mirror of
https://github.com/rustsec/advisory-db.git
synced 2026-07-21 00:57:09 -04:00
Update gh-pages
This commit is contained in:
273
advisories/RUSTSEC-2026-0201.html
Normal file
273
advisories/RUSTSEC-2026-0201.html
Normal file
@@ -0,0 +1,273 @@
|
||||
<!DOCTYPE html>
|
||||
|
||||
<meta name="viewport" content="width=device-width, initial-scale=1.0">
|
||||
<meta charset="utf-8">
|
||||
|
||||
<meta name="author" content="Rust Project Developers">
|
||||
<meta name="description" content="Security advisory database for Rust crates published through https://crates.io">
|
||||
<title>RUSTSEC-2026-0201: fulgur: Non-painting replaced elements amplify to thousands of blank PDF pages (denial of service) › RustSec Advisory Database</title>
|
||||
|
||||
<link href="//fonts.googleapis.com/css?family=Source+Sans+Pro:300,400,300italic,400italic" rel="stylesheet">
|
||||
<link href="/css/basic.css" rel="stylesheet">
|
||||
<link href="/css/highlight.css" rel="stylesheet">
|
||||
<link href="/css/index.css" rel="stylesheet">
|
||||
|
||||
<script src="/js/index.js" defer></script>
|
||||
<script src="/js/search.js" defer></script>
|
||||
|
||||
<header>
|
||||
<div class="header-top">
|
||||
<h1><a href="/">
|
||||
<picture>
|
||||
<source srcset="/img/rustsec-logo-light.svg" media="(prefers-color-scheme: light)">
|
||||
<img src="/img/rustsec-logo-dark.svg" alt="RustSec logo" class="logo-image">
|
||||
</picture>
|
||||
</a></h1>
|
||||
|
||||
<div class="search">
|
||||
<form onsubmit="return searchform();">
|
||||
<input type="search" id="search-term"
|
||||
placeholder="Look up package or ID..." required
|
||||
size="20">
|
||||
</form>
|
||||
</div>
|
||||
|
||||
</div>
|
||||
<nav>
|
||||
<div>
|
||||
<a href="/">About</a>
|
||||
<a href="/advisories/">Advisories</a>
|
||||
<a href="/contributing.html">Report Vulnerabilities</a>
|
||||
</div>
|
||||
<div>
|
||||
<a href="https://rust-lang.zulipchat.com/login/#narrow/stream/146229-wg-secure-code/" title="Zulip" aria-label="Zulip"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" style="height:1em;fill:currentColor"><path d="M473.09 122.97c0 22.69-10.19 42.85-25.72 55.08L296.61 312.69c-2.8 2.4-6.44-1.47-4.42-4.7l55.3-110.72c1.55-3.1-.46-6.91-3.64-6.91H129.36c-33.22 0-60.4-30.32-60.4-67.37 0-37.06 27.18-67.37 60.4-67.37h283.33c33.22-.02 60.4 30.3 60.4 67.35zM129.36 506.05h283.33c33.22 0 60.4-30.32 60.4-67.37 0-37.06-27.18-67.37-60.4-67.37H198.2c-3.18 0-5.19-3.81-3.64-6.91l55.3-110.72c2.02-3.23-1.62-7.1-4.42-4.7L94.68 383.6c-15.53 12.22-25.72 32.39-25.72 55.08 0 37.05 27.18 67.37 60.4 67.37zm522.5-124.15l124.78-179.6v-1.56H663.52v-48.98h190.09v34.21L731.55 363.24v1.56h124.01v48.98h-203.7V381.9zm338.98-230.14V302.6c0 45.09 17.1 68.03 47.43 68.03 31.1 0 48.2-21.77 48.2-68.03V151.76h59.09V298.7c0 80.86-40.82 119.34-109.24 119.34-66.09 0-104.96-36.54-104.96-120.12V151.76h59.48zm244.91 0h59.48v212.25h104.18v49.76h-163.66V151.76zm297 0v262.01h-59.48V151.76h59.48zm90.18 3.5c18.27-3.11 43.93-5.44 80.08-5.44 36.54 0 62.59 7 80.08 20.99 16.72 13.22 27.99 34.99 27.99 60.64 0 25.66-8.55 47.43-24.1 62.2-20.21 19.05-50.15 27.6-85.13 27.6-7.77 0-14.77-.39-20.21-1.17v93.69h-58.7V155.26zm58.7 118.96c5.05 1.17 11.27 1.55 19.83 1.55 31.49 0 50.92-15.94 50.92-42.76 0-24.1-16.72-38.49-46.26-38.49-12.05 0-20.21 1.17-24.49 2.33v77.37z"/></svg></a>
|
||||
<a href="https://twitter.com/RustSec/" title="Twitter" aria-label="Twitter"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" style="height:1em;fill:currentColor"><path d="M459.37 151.716c.325 4.548.325 9.097.325 13.645 0 138.72-105.583 298.558-298.558 298.558-59.452 0-114.68-17.219-161.137-47.106 8.447.974 16.568 1.299 25.34 1.299 49.055 0 94.213-16.568 130.274-44.832-46.132-.975-84.792-31.188-98.112-72.772 6.498.974 12.995 1.624 19.818 1.624 9.421 0 18.843-1.3 27.614-3.573-48.081-9.747-84.143-51.98-84.143-102.985v-1.299c13.969 7.797 30.214 12.67 47.431 13.319-28.264-18.843-46.781-51.005-46.781-87.391 0-19.492 5.197-37.36 14.294-52.954 51.655 63.675 129.3 105.258 216.365 109.807-1.624-7.797-2.599-15.918-2.599-24.04 0-57.828 46.782-104.934 104.934-104.934 30.213 0 57.502 12.67 76.67 33.137 23.715-4.548 46.456-13.32 66.599-25.34-7.798 24.366-24.366 44.833-46.132 57.827 21.117-2.273 41.584-8.122 60.426-16.243-14.292 20.791-32.161 39.308-52.628 54.253z"/></svg></a>
|
||||
<a href="https://github.com/RustSec/" title="GitHub" aria-label="GitHub"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 496 512" style="height:1em;fill:currentColor"><path d="M165.9 397.4c0 2-2.3 3.6-5.2 3.6-3.3.3-5.6-1.3-5.6-3.6 0-2 2.3-3.6 5.2-3.6 3-.3 5.6 1.3 5.6 3.6zm-31.1-4.5c-.7 2 1.3 4.3 4.3 4.9 2.6 1 5.6 0 6.2-2s-1.3-4.3-4.3-5.2c-2.6-.7-5.5.3-6.2 2.3zm44.2-1.7c-2.9.7-4.9 2.6-4.6 4.9.3 2 2.9 3.3 5.9 2.6 2.9-.7 4.9-2.6 4.6-4.6-.3-1.9-3-3.2-5.9-2.9zM244.8 8C106.1 8 0 113.3 0 252c0 110.9 69.8 205.8 169.5 239.2 12.8 2.3 17.3-5.6 17.3-12.1 0-6.2-.3-40.4-.3-61.4 0 0-70 15-84.7-29.8 0 0-11.4-29.1-27.8-36.6 0 0-22.9-15.7 1.6-15.4 0 0 24.9 2 38.6 25.8 21.9 38.6 58.6 27.5 72.9 20.9 2.3-16 8.8-27.1 16-33.7-55.9-6.2-112.3-14.3-112.3-110.5 0-27.5 7.6-41.3 23.6-58.9-2.6-6.5-11.1-33.3 2.6-67.9 20.9-6.5 69 27 69 27 20-5.6 41.5-8.5 62.8-8.5s42.8 2.9 62.8 8.5c0 0 48.1-33.6 69-27 13.7 34.7 5.2 61.4 2.6 67.9 16 17.7 25.8 31.5 25.8 58.9 0 96.5-58.9 104.2-114.8 110.5 9.2 7.9 17 22.9 17 46.4 0 33.7-.3 75.4-.3 83.6 0 6.5 4.6 14.4 17.3 12.1C428.2 457.8 496 362.9 496 252 496 113.3 383.5 8 244.8 8zM97.2 352.9c-1.3 1-1 3.3.7 5.2 1.6 1.6 3.9 2.3 5.2 1 1.3-1 1-3.3-.7-5.2-1.6-1.6-3.9-2.3-5.2-1zm-10.8-8.1c-.7 1.3.3 2.9 2.3 3.9 1.6 1 3.6.7 4.3-.7.7-1.3-.3-2.9-2.3-3.9-2-.6-3.6-.3-4.3.7zm32.4 35.6c-1.6 1.3-1 4.3 1.3 6.2 2.3 2.3 5.2 2.6 6.5 1 1.3-1.3.7-4.3-1.3-6.2-2.2-2.3-5.2-2.6-6.5-1zm-11.4-14.7c-1.6 1-1.6 3.6 0 5.9 1.6 2.3 4.3 3.3 5.6 2.3 1.6-1.3 1.6-3.9 0-6.2-1.4-2.3-4-3.3-5.6-2z"/></svg></a>
|
||||
<a href="/feed.xml" title="Atom Feed" aria-label="Atom Feed"><svg xmlns="http://www.w3.org/2000/svg" style="height:1em" viewBox="0 0 8 8">
|
||||
<circle class="symbol" cx="2" cy="6" r="1" />
|
||||
<path class="symbol" d="m 1,4 a 3,3 0 0 1 3,3 h 1 a 4,4 0 0 0 -4,-4 z" />
|
||||
<path class="symbol" d="m 1,2 a 5,5 0 0 1 5,5 h 1 a 6,6 0 0 0 -6,-6 z" />
|
||||
</svg></a>
|
||||
</div>
|
||||
</nav>
|
||||
</header>
|
||||
|
||||
<main class="advisory">
|
||||
<article>
|
||||
|
||||
<span class="floating-menu">
|
||||
<a href="https://github.com/RustSec/advisory-db/commits/main/crates/fulgur/RUSTSEC-2026-0201.md">History</a> ⋅
|
||||
<a href="https://github.com/RustSec/advisory-db/edit/main/crates/fulgur/RUSTSEC-2026-0201.md">Edit</a> ⋅
|
||||
<a href="https://api.osv.dev/v1/vulns/RUSTSEC-2026-0201">JSON (OSV)</a>
|
||||
</span>
|
||||
|
||||
|
||||
<header>
|
||||
<h1>
|
||||
|
||||
RUSTSEC-2026-0201
|
||||
|
||||
</h1>
|
||||
<span class="subtitle"><p>Non-painting replaced elements amplify to thousands of blank PDF pages (denial of service)</p>
|
||||
</span>
|
||||
</header>
|
||||
|
||||
|
||||
|
||||
<dl>
|
||||
<dt id="reported">Reported</dt>
|
||||
<dd>
|
||||
<time datetime="2026-07-05">
|
||||
July 5, 2026
|
||||
</time>
|
||||
</dd>
|
||||
|
||||
<dt id="issued">Issued</dt>
|
||||
<dd>
|
||||
<time datetime="2026-07-04">
|
||||
July 4, 2026
|
||||
</time>
|
||||
|
||||
</dd>
|
||||
|
||||
<dt id="package">Package</dt>
|
||||
<dd>
|
||||
|
||||
|
||||
<a href="/packages/fulgur.html">fulgur</a>
|
||||
|
||||
(<a href="https://crates.io/crates/fulgur">crates.io</a>)
|
||||
|
||||
|
||||
|
||||
</dd>
|
||||
|
||||
<dt id="type">Type</dt>
|
||||
<dd>
|
||||
|
||||
Vulnerability
|
||||
|
||||
</dd>
|
||||
|
||||
|
||||
<dt id="categories">Categories</dt>
|
||||
<dd>
|
||||
<ul>
|
||||
|
||||
<li><a href="/categories/denial-of-service.html">denial-of-service</a></li>
|
||||
|
||||
</ul>
|
||||
</dd>
|
||||
|
||||
|
||||
|
||||
<dt id="keywords">Keywords</dt>
|
||||
<dd>
|
||||
|
||||
<a href="/keywords/dos.html">#dos</a>
|
||||
|
||||
<a href="/keywords/pagination.html">#pagination</a>
|
||||
|
||||
<a href="/keywords/pdf.html">#pdf</a>
|
||||
|
||||
</dd>
|
||||
|
||||
|
||||
|
||||
<dt id="aliases">Aliases</dt>
|
||||
<dd>
|
||||
<ul>
|
||||
|
||||
<li>
|
||||
|
||||
<a href="https://github.com/advisories/GHSA-4rf6-qx84-q9fv">GHSA-4rf6-qx84-q9fv</a>
|
||||
|
||||
</li>
|
||||
|
||||
</ul>
|
||||
</dd>
|
||||
|
||||
|
||||
|
||||
<dt id="details">References</dt>
|
||||
<dd>
|
||||
<ul>
|
||||
|
||||
<li>
|
||||
<a href="https://github.com/fulgur-rs/fulgur/security/advisories/GHSA-4rf6-qx84-q9fv">
|
||||
https://github.com/fulgur-rs/fulgur/security/advisories/GHSA-4rf6-qx84-q9fv
|
||||
</a>
|
||||
</li>
|
||||
|
||||
|
||||
</ul>
|
||||
</dd>
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
<dt id="cvss_score">CVSS Score</dt>
|
||||
<dd>7.5 <span class="tag high">
|
||||
HIGH
|
||||
</span></dd>
|
||||
|
||||
<dt id="cvss_details">CVSS Details</dt>
|
||||
<dd>
|
||||
<dl>
|
||||
|
||||
<dt>Attack Vector</dt>
|
||||
<dd>Network</dd>
|
||||
|
||||
<dt>Attack Complexity</dt>
|
||||
<dd>Low</dd>
|
||||
|
||||
<dt>Privileges Required</dt>
|
||||
<dd>None</dd>
|
||||
|
||||
<dt>User Interaction</dt>
|
||||
<dd>None</dd>
|
||||
|
||||
<dt>Scope</dt>
|
||||
<dd>Unchanged</dd>
|
||||
|
||||
<dt>Confidentiality Impact</dt>
|
||||
<dd>None</dd>
|
||||
|
||||
<dt>Integrity Impact</dt>
|
||||
<dd>None</dd>
|
||||
|
||||
<dt>Availability Impact</dt>
|
||||
<dd>High</dd>
|
||||
|
||||
</dl>
|
||||
</dd>
|
||||
|
||||
<dt id="cvss">CVSS Vector</dt>
|
||||
|
||||
|
||||
<dd><a href="https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H">CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H</a></dd>
|
||||
|
||||
|
||||
|
||||
|
||||
<dt id="patched">Patched</dt>
|
||||
<dd>
|
||||
|
||||
<ul>
|
||||
|
||||
<li><code>>=0.26.0</code></li>
|
||||
|
||||
</ul>
|
||||
|
||||
</dd>
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
</dl>
|
||||
|
||||
|
||||
|
||||
|
||||
<h3 id="description">Description</h3>
|
||||
<p><code>fulgur</code> converts untrusted HTML/CSS into PDF, commonly on a server that
|
||||
processes input supplied by many tenants. In versions prior to 0.26.0, a
|
||||
childless box that resolves to a pathologically tall height was amplified into
|
||||
thousands of blank PDF pages, even when it produces no visible output.</p>
|
||||
<p>The childless-collapse defense that would normally collapse such a box was gated
|
||||
by a tag-only "replaced content" check, so any non-painting replaced element
|
||||
bypassed it, including an unresolved <code>src</code> (the common offline-first case), a
|
||||
<code>visibility:hidden</code> image, an undecodable image format, and an empty <code><svg></code>. A
|
||||
trailing-sibling variant of the same gap was also open.</p>
|
||||
<p>A few bytes of HTML therefore amplified into roughly <code>MAX_PAGES</code> (10,000) blank
|
||||
pages; the renderer allocates and runs a per-page loop over them, producing CPU
|
||||
and memory exhaustion. An attacker able to submit HTML to a fulgur-based
|
||||
conversion service can trigger this with a trivially small payload, denying
|
||||
service to the host and any co-tenants.</p>
|
||||
<p>Fixed in 0.26.0: the tag-only gate was removed so that any pathologically tall
|
||||
childless box collapses regardless of whether it is a replaced element, closing
|
||||
the missing-<code>src</code>, <code>visibility:hidden</code>, undecodable-format, and empty-<code><svg></code>
|
||||
vectors along with the trailing-sibling variant.</p>
|
||||
<p>Versions prior to 0.19.0 additionally lacked any page-count cap, allowing an
|
||||
unbounded (rather than 10,000-page) variant of this amplification; that earlier
|
||||
variant is tracked separately as GHSA-j5cx-ph8g-95v3.</p>
|
||||
<h2>Attack Vector rationale</h2>
|
||||
<p><code>fulgur</code> performs no network I/O of its own; it renders HTML/CSS handed to it by
|
||||
the embedding application. This advisory scores the crate independent of any
|
||||
specific adopting program, so per the CVSS v3.1 User Guide §3.7 the Attack
|
||||
Vector is assessed as Network for the reasonable worst-case deployment — a
|
||||
network-facing service that renders untrusted HTML without user interaction. A
|
||||
concrete system that receives the HTML in one component and passes it to fulgur
|
||||
in a separate component may assess a lower environmental Attack Vector (Local,
|
||||
per §3.10).</p>
|
||||
|
||||
|
||||
<p id="license" class="license">Advisory available under <a href="https://spdx.org/licenses/CC0-1.0.html">CC0-1.0</a>
|
||||
license.
|
||||
|
||||
|
||||
</p>
|
||||
</article>
|
||||
</main>
|
||||
@@ -89,6 +89,25 @@
|
||||
</time>
|
||||
|
||||
|
||||
<h3>
|
||||
|
||||
<span class="tag high">HIGH</span>
|
||||
|
||||
<a href="/advisories/RUSTSEC-2026-0201.html">
|
||||
RUSTSEC-2026-0201: Vulnerability in fulgur
|
||||
</a>
|
||||
</h3>
|
||||
<span><p>Non-painting replaced elements amplify to thousands of blank PDF pages (denial of service)</p>
|
||||
</span>
|
||||
|
||||
</li>
|
||||
|
||||
<li>
|
||||
<time datetime="2026-07-04">
|
||||
July 4, 2026
|
||||
</time>
|
||||
|
||||
|
||||
<h3>
|
||||
|
||||
<span class="tag high">HIGH</span>
|
||||
|
||||
@@ -91,6 +91,25 @@
|
||||
</time>
|
||||
|
||||
|
||||
<h3>
|
||||
|
||||
<span class="tag high">HIGH</span>
|
||||
|
||||
<a href="/advisories/RUSTSEC-2026-0201.html">
|
||||
RUSTSEC-2026-0201: Vulnerability in fulgur
|
||||
</a>
|
||||
</h3>
|
||||
<span><p>Non-painting replaced elements amplify to thousands of blank PDF pages (denial of service)</p>
|
||||
</span>
|
||||
|
||||
</li>
|
||||
|
||||
<li>
|
||||
<time datetime="2026-07-04">
|
||||
July 4, 2026
|
||||
</time>
|
||||
|
||||
|
||||
<h3>
|
||||
|
||||
<span class="tag high">HIGH</span>
|
||||
|
||||
216
feed.xml
216
feed.xml
@@ -239,6 +239,222 @@ in <code>split_hash</code> or <code>verify</code>.</p
|
||||
license.
|
||||
|
||||
|
||||
</p>
|
||||
</article></content></entry><entry><title>RUSTSEC-2026-0201: Vulnerability in fulgur</title><id>https://rustsec.org/advisories/RUSTSEC-2026-0201.html</id><updated>2026-07-04T12:00:00+00:00</updated><category term="denial-of-service"/><link href="https://rustsec.org/advisories/RUSTSEC-2026-0201.html" rel="alternate" type="text/html" title="RUSTSEC-2026-0201: Vulnerability in fulgur"/><published>2026-07-04T12:00:00+00:00</published><summary xml:lang="en">Non-painting replaced elements amplify to thousands of blank PDF pages (denial of service)</summary><content xml:lang="en" type="html"> <article>
|
||||
|
||||
<span class="floating-menu">
|
||||
<a href="https://github.com/RustSec/advisory-db/commits/main/crates/fulgur/RUSTSEC-2026-0201.md">History</a> ⋅
|
||||
<a href="https://github.com/RustSec/advisory-db/edit/main/crates/fulgur/RUSTSEC-2026-0201.md">Edit</a> ⋅
|
||||
<a href="https://api.osv.dev/v1/vulns/RUSTSEC-2026-0201">JSON (OSV)</a>
|
||||
</span>
|
||||
|
||||
|
||||
<header>
|
||||
<h1>
|
||||
|
||||
RUSTSEC-2026-0201
|
||||
|
||||
</h1>
|
||||
<span class="subtitle"><p>Non-painting replaced elements amplify to thousands of blank PDF pages (denial of service)</p>
|
||||
</span>
|
||||
</header>
|
||||
|
||||
|
||||
|
||||
<dl>
|
||||
<dt id="reported">Reported</dt>
|
||||
<dd>
|
||||
<time datetime="2026-07-05">
|
||||
July 5, 2026
|
||||
</time>
|
||||
</dd>
|
||||
|
||||
<dt id="issued">Issued</dt>
|
||||
<dd>
|
||||
<time datetime="2026-07-04">
|
||||
July 4, 2026
|
||||
</time>
|
||||
|
||||
</dd>
|
||||
|
||||
<dt id="package">Package</dt>
|
||||
<dd>
|
||||
|
||||
|
||||
<a href="/packages/fulgur.html">fulgur</a>
|
||||
|
||||
(<a href="https://crates.io/crates/fulgur">crates.io</a>)
|
||||
|
||||
|
||||
|
||||
</dd>
|
||||
|
||||
<dt id="type">Type</dt>
|
||||
<dd>
|
||||
|
||||
Vulnerability
|
||||
|
||||
</dd>
|
||||
|
||||
|
||||
<dt id="categories">Categories</dt>
|
||||
<dd>
|
||||
<ul>
|
||||
|
||||
<li><a href="/categories/denial-of-service.html">denial-of-service</a></li>
|
||||
|
||||
</ul>
|
||||
</dd>
|
||||
|
||||
|
||||
|
||||
<dt id="keywords">Keywords</dt>
|
||||
<dd>
|
||||
|
||||
<a href="/keywords/dos.html">#dos</a>
|
||||
|
||||
<a href="/keywords/pagination.html">#pagination</a>
|
||||
|
||||
<a href="/keywords/pdf.html">#pdf</a>
|
||||
|
||||
</dd>
|
||||
|
||||
|
||||
|
||||
<dt id="aliases">Aliases</dt>
|
||||
<dd>
|
||||
<ul>
|
||||
|
||||
<li>
|
||||
|
||||
<a href="https://github.com/advisories/GHSA-4rf6-qx84-q9fv">GHSA-4rf6-qx84-q9fv</a>
|
||||
|
||||
</li>
|
||||
|
||||
</ul>
|
||||
</dd>
|
||||
|
||||
|
||||
|
||||
<dt id="details">References</dt>
|
||||
<dd>
|
||||
<ul>
|
||||
|
||||
<li>
|
||||
<a href="https://github.com/fulgur-rs/fulgur/security/advisories/GHSA-4rf6-qx84-q9fv">
|
||||
https://github.com/fulgur-rs/fulgur/security/advisories/GHSA-4rf6-qx84-q9fv
|
||||
</a>
|
||||
</li>
|
||||
|
||||
|
||||
</ul>
|
||||
</dd>
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
<dt id="cvss_score">CVSS Score</dt>
|
||||
<dd>7.5 <span class="tag high">
|
||||
HIGH
|
||||
</span></dd>
|
||||
|
||||
<dt id="cvss_details">CVSS Details</dt>
|
||||
<dd>
|
||||
<dl>
|
||||
|
||||
<dt>Attack Vector</dt>
|
||||
<dd>Network</dd>
|
||||
|
||||
<dt>Attack Complexity</dt>
|
||||
<dd>Low</dd>
|
||||
|
||||
<dt>Privileges Required</dt>
|
||||
<dd>None</dd>
|
||||
|
||||
<dt>User Interaction</dt>
|
||||
<dd>None</dd>
|
||||
|
||||
<dt>Scope</dt>
|
||||
<dd>Unchanged</dd>
|
||||
|
||||
<dt>Confidentiality Impact</dt>
|
||||
<dd>None</dd>
|
||||
|
||||
<dt>Integrity Impact</dt>
|
||||
<dd>None</dd>
|
||||
|
||||
<dt>Availability Impact</dt>
|
||||
<dd>High</dd>
|
||||
|
||||
</dl>
|
||||
</dd>
|
||||
|
||||
<dt id="cvss">CVSS Vector</dt>
|
||||
|
||||
|
||||
<dd><a href="https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H">CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H</a></dd>
|
||||
|
||||
|
||||
|
||||
|
||||
<dt id="patched">Patched</dt>
|
||||
<dd>
|
||||
|
||||
<ul>
|
||||
|
||||
<li><code>&#62;=0.26.0</code></li>
|
||||
|
||||
</ul>
|
||||
|
||||
</dd>
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
</dl>
|
||||
|
||||
|
||||
|
||||
|
||||
<h3 id="description">Description</h3>
|
||||
<p><code>fulgur</code> converts untrusted HTML/CSS into PDF, commonly on a server that
|
||||
processes input supplied by many tenants. In versions prior to 0.26.0, a
|
||||
childless box that resolves to a pathologically tall height was amplified into
|
||||
thousands of blank PDF pages, even when it produces no visible output.</p>
|
||||
<p>The childless-collapse defense that would normally collapse such a box was gated
|
||||
by a tag-only &quot;replaced content&quot; check, so any non-painting replaced element
|
||||
bypassed it, including an unresolved <code>src</code> (the common offline-first case), a
|
||||
<code>visibility:hidden</code> image, an undecodable image format, and an empty <code>&lt;svg&gt;</code>. A
|
||||
trailing-sibling variant of the same gap was also open.</p>
|
||||
<p>A few bytes of HTML therefore amplified into roughly <code>MAX_PAGES</code> (10,000) blank
|
||||
pages; the renderer allocates and runs a per-page loop over them, producing CPU
|
||||
and memory exhaustion. An attacker able to submit HTML to a fulgur-based
|
||||
conversion service can trigger this with a trivially small payload, denying
|
||||
service to the host and any co-tenants.</p>
|
||||
<p>Fixed in 0.26.0: the tag-only gate was removed so that any pathologically tall
|
||||
childless box collapses regardless of whether it is a replaced element, closing
|
||||
the missing-<code>src</code>, <code>visibility:hidden</code>, undecodable-format, and empty-<code>&lt;svg&gt;</code>
|
||||
vectors along with the trailing-sibling variant.</p>
|
||||
<p>Versions prior to 0.19.0 additionally lacked any page-count cap, allowing an
|
||||
unbounded (rather than 10,000-page) variant of this amplification; that earlier
|
||||
variant is tracked separately as GHSA-j5cx-ph8g-95v3.</p>
|
||||
<h2>Attack Vector rationale</h2>
|
||||
<p><code>fulgur</code> performs no network I/O of its own; it renders HTML/CSS handed to it by
|
||||
the embedding application. This advisory scores the crate independent of any
|
||||
specific adopting program, so per the CVSS v3.1 User Guide §3.7 the Attack
|
||||
Vector is assessed as Network for the reasonable worst-case deployment — a
|
||||
network-facing service that renders untrusted HTML without user interaction. A
|
||||
concrete system that receives the HTML in one component and passes it to fulgur
|
||||
in a separate component may assess a lower environmental Attack Vector (Local,
|
||||
per §3.10).</p>
|
||||
|
||||
|
||||
<p id="license" class="license">Advisory available under <a href="https://spdx.org/licenses/CC0-1.0.html">CC0-1.0</a>
|
||||
license.
|
||||
|
||||
|
||||
</p>
|
||||
</article></content></entry><entry><title>RUSTSEC-2026-0200: Vulnerability in fulgur</title><id>https://rustsec.org/advisories/RUSTSEC-2026-0200.html</id><updated>2026-07-04T12:00:00+00:00</updated><category term="denial-of-service"/><link href="https://rustsec.org/advisories/RUSTSEC-2026-0200.html" rel="alternate" type="text/html" title="RUSTSEC-2026-0200: Vulnerability in fulgur"/><published>2026-07-04T12:00:00+00:00</published><summary xml:lang="en">Unbounded page slicing from attacker-controlled CSS height causes denial of service</summary><content xml:lang="en" type="html"> <article>
|
||||
|
||||
|
||||
File diff suppressed because one or more lines are too long
@@ -72,6 +72,25 @@
|
||||
</time>
|
||||
|
||||
|
||||
<h3>
|
||||
|
||||
<span class="tag high">HIGH</span>
|
||||
|
||||
<a href="/advisories/RUSTSEC-2026-0201.html">
|
||||
RUSTSEC-2026-0201: Vulnerability in fulgur
|
||||
</a>
|
||||
</h3>
|
||||
<span><p>Non-painting replaced elements amplify to thousands of blank PDF pages (denial of service)</p>
|
||||
</span>
|
||||
|
||||
</li>
|
||||
|
||||
<li>
|
||||
<time datetime="2026-07-04">
|
||||
July 4, 2026
|
||||
</time>
|
||||
|
||||
|
||||
<h3>
|
||||
|
||||
<span class="tag high">HIGH</span>
|
||||
|
||||
@@ -72,6 +72,25 @@
|
||||
</time>
|
||||
|
||||
|
||||
<h3>
|
||||
|
||||
<span class="tag high">HIGH</span>
|
||||
|
||||
<a href="/advisories/RUSTSEC-2026-0201.html">
|
||||
RUSTSEC-2026-0201: Vulnerability in fulgur
|
||||
</a>
|
||||
</h3>
|
||||
<span><p>Non-painting replaced elements amplify to thousands of blank PDF pages (denial of service)</p>
|
||||
</span>
|
||||
|
||||
</li>
|
||||
|
||||
<li>
|
||||
<time datetime="2026-07-04">
|
||||
July 4, 2026
|
||||
</time>
|
||||
|
||||
|
||||
<h3>
|
||||
|
||||
<span class="tag high">HIGH</span>
|
||||
|
||||
@@ -72,6 +72,25 @@
|
||||
</time>
|
||||
|
||||
|
||||
<h3>
|
||||
|
||||
<span class="tag high">HIGH</span>
|
||||
|
||||
<a href="/advisories/RUSTSEC-2026-0201.html">
|
||||
RUSTSEC-2026-0201: Vulnerability in fulgur
|
||||
</a>
|
||||
</h3>
|
||||
<span><p>Non-painting replaced elements amplify to thousands of blank PDF pages (denial of service)</p>
|
||||
</span>
|
||||
|
||||
</li>
|
||||
|
||||
<li>
|
||||
<time datetime="2026-07-04">
|
||||
July 4, 2026
|
||||
</time>
|
||||
|
||||
|
||||
<h3>
|
||||
|
||||
<span class="tag high">HIGH</span>
|
||||
|
||||
@@ -72,6 +72,25 @@
|
||||
</time>
|
||||
|
||||
|
||||
<h3>
|
||||
|
||||
<span class="tag high">HIGH</span>
|
||||
|
||||
<a href="/advisories/RUSTSEC-2026-0201.html">
|
||||
RUSTSEC-2026-0201: Vulnerability in fulgur
|
||||
</a>
|
||||
</h3>
|
||||
<span><p>Non-painting replaced elements amplify to thousands of blank PDF pages (denial of service)</p>
|
||||
</span>
|
||||
|
||||
</li>
|
||||
|
||||
<li>
|
||||
<time datetime="2026-07-04">
|
||||
July 4, 2026
|
||||
</time>
|
||||
|
||||
|
||||
<h3>
|
||||
|
||||
<span class="tag high">HIGH</span>
|
||||
|
||||
@@ -1,4 +1,76 @@
|
||||
[
|
||||
{
|
||||
"id": "RUSTSEC-2026-0201",
|
||||
"modified": "2026-07-04T20:19:28Z",
|
||||
"published": "2026-07-05T12:00:00Z",
|
||||
"aliases": [
|
||||
"GHSA-4rf6-qx84-q9fv"
|
||||
],
|
||||
"related": [],
|
||||
"summary": "Non-painting replaced elements amplify to thousands of blank PDF pages (denial of service)",
|
||||
"details": "`fulgur` converts untrusted HTML/CSS into PDF, commonly on a server that\nprocesses input supplied by many tenants. In versions prior to 0.26.0, a\nchildless box that resolves to a pathologically tall height was amplified into\nthousands of blank PDF pages, even when it produces no visible output.\n\nThe childless-collapse defense that would normally collapse such a box was gated\nby a tag-only \"replaced content\" check, so any non-painting replaced element\nbypassed it, including an unresolved `src` (the common offline-first case), a\n`visibility:hidden` image, an undecodable image format, and an empty `<svg>`. A\ntrailing-sibling variant of the same gap was also open.\n\nA few bytes of HTML therefore amplified into roughly `MAX_PAGES` (10,000) blank\npages; the renderer allocates and runs a per-page loop over them, producing CPU\nand memory exhaustion. An attacker able to submit HTML to a fulgur-based\nconversion service can trigger this with a trivially small payload, denying\nservice to the host and any co-tenants.\n\nFixed in 0.26.0: the tag-only gate was removed so that any pathologically tall\nchildless box collapses regardless of whether it is a replaced element, closing\nthe missing-`src`, `visibility:hidden`, undecodable-format, and empty-`<svg>`\nvectors along with the trailing-sibling variant.\n\nVersions prior to 0.19.0 additionally lacked any page-count cap, allowing an\nunbounded (rather than 10,000-page) variant of this amplification; that earlier\nvariant is tracked separately as GHSA-j5cx-ph8g-95v3.\n\n## Attack Vector rationale\n\n`fulgur` performs no network I/O of its own; it renders HTML/CSS handed to it by\nthe embedding application. This advisory scores the crate independent of any\nspecific adopting program, so per the CVSS v3.1 User Guide §3.7 the Attack\nVector is assessed as Network for the reasonable worst-case deployment — a\nnetwork-facing service that renders untrusted HTML without user interaction. A\nconcrete system that receives the HTML in one component and passes it to fulgur\nin a separate component may assess a lower environmental Attack Vector (Local,\nper §3.10).",
|
||||
"severity": [
|
||||
{
|
||||
"type": "CVSS_V3",
|
||||
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
|
||||
}
|
||||
],
|
||||
"affected": [
|
||||
{
|
||||
"package": {
|
||||
"ecosystem": "crates.io",
|
||||
"name": "fulgur",
|
||||
"purl": "pkg:cargo/fulgur"
|
||||
},
|
||||
"ecosystem_specific": {
|
||||
"affects": {
|
||||
"arch": [],
|
||||
"os": [],
|
||||
"functions": []
|
||||
},
|
||||
"affected_functions": null
|
||||
},
|
||||
"database_specific": {
|
||||
"categories": [
|
||||
"denial-of-service"
|
||||
],
|
||||
"cvss": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
|
||||
"informational": null
|
||||
},
|
||||
"ranges": [
|
||||
{
|
||||
"type": "SEMVER",
|
||||
"events": [
|
||||
{
|
||||
"introduced": "0.0.0-0"
|
||||
},
|
||||
{
|
||||
"fixed": "0.26.0"
|
||||
}
|
||||
]
|
||||
}
|
||||
],
|
||||
"versions": []
|
||||
}
|
||||
],
|
||||
"references": [
|
||||
{
|
||||
"type": "PACKAGE",
|
||||
"url": "https://crates.io/crates/fulgur"
|
||||
},
|
||||
{
|
||||
"type": "ADVISORY",
|
||||
"url": "https://rustsec.org/advisories/RUSTSEC-2026-0201.html"
|
||||
},
|
||||
{
|
||||
"type": "ADVISORY",
|
||||
"url": "https://github.com/fulgur-rs/fulgur/security/advisories/GHSA-4rf6-qx84-q9fv"
|
||||
}
|
||||
],
|
||||
"database_specific": {
|
||||
"license": "CC0-1.0"
|
||||
}
|
||||
},
|
||||
{
|
||||
"id": "RUSTSEC-2026-0200",
|
||||
"modified": "2026-07-04T19:39:58Z",
|
||||
|
||||
@@ -1526,7 +1526,7 @@
|
||||
|
||||
<li><a href="/packages/fulgur.html">fulgur</a>
|
||||
|
||||
(1)
|
||||
(2)
|
||||
|
||||
</li>
|
||||
|
||||
|
||||
Reference in New Issue
Block a user