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advisory-db/crates/base64/RUSTSEC-2017-0004.md
Tony Arcieri ac125ee29a Translate database into V3 advisory format (#420)
As proposed in #240 and tracked in #414, this PR translates all
advisories into the new "V3" advisory format, which is based on Markdown
with leading TOML front matter.

This format makes it easier to see rendered Markdown syntax
descriptions, whether rendered by an IDE or GitHub. This should help
with both crafting advisories initially as well as review, and ideally
encourages more lengthy descriptions.

Support for this format shipped in `cargo-audit` v0.12.0 on
May 6th, 2020.
2020-10-01 18:29:11 -07:00

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[advisory]
id = "RUSTSEC-2017-0004"
package = "base64"
aliases = ["CVE-2017-1000430"]
date = "2017-05-03"
keywords = ["memory-corruption"]
url = "https://github.com/alicemaz/rust-base64/commit/24ead980daf11ba563e4fb2516187a56a71ad319"

[versions]
patched = [">= 0.5.2"]

Integer overflow leads to heap-based buffer overflow in encode_config_buf

Affected versions of this crate suffered from an integer overflow bug when calculating the size of a buffer to use when encoding base64 using the encode_config_buf and encode_config functions. If the input string was large, this would cause a buffer to be allocated that was too small. Since this function writes to the buffer using unsafe code, it would allow an attacker to write beyond the buffer, causing memory corruption and possibly the execution of arbitrary code.

This flaw was corrected by using checked arithmetic to calculate the size of the buffer.