Integer overflow in the bundled Brotli C library
A buffer overflow exists in the Brotli library versions prior to 1.0.8 where an attacker controlling the input length of a "one-shot" decompression request to a script can trigger a crash, which happens when copying over chunks of data larger than 2 GiB. An updated version of `brotli-sys` has not been released. If one cannot update the C library, its authors recommend to use the "streaming" API as opposed to the "one-shot" API, and impose chunk size limits. In Rust the issue can be mitigated by migrating to the `brotli` crate, which provides a Rust implementation of Brotli compression and decompression that is not affected by this issue.
describes (2)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2020-36846US | — | — | ||
A buffer overflow, as described in CVE-2020-8927, exists in the embedded Brotli library. Versions of IO::Compress::Brotli prior to 0.007 included a version of the brotli library p… | ||||
| CVE-2020-8927US | medium6.5 | — | ||
A buffer overflow exists in the Brotli library versions prior to 1.0.8 where an attacker controlling the input length of a "one-shot" decompression request to a script can trigger… | ||||
references
External citations — patches, advisories, analysis.
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