CVE-2020-36846
IO::Compress::Brotli versions prior to 0.007 for Perl have an integer overflow in the bundled Brotli C library
In short
A flaw in the Brotli compression library used by IO::Compress::Brotli allows an attacker to crash a script by sending specially crafted compressed data larger than 2 GB. This affects versions before 0.007 and can impact any application using this module to decompress untrusted data.
Technical detail
An integer overflow in the bundled Brotli C library (pre-1.0.8) permits denial of service via oversized decompression requests in one-shot mode. The attack requires attacker-controlled input and triggers a buffer overflow when processing chunks exceeding 2 GiB, causing application crash. Mitigation includes upgrading to version 0.007+ or switching to streaming decompression with size limits.
Summary generated and translated by AI from the official description.
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 prior to version 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. It is recommended to update your IO::Compress::Brotli module to 0.007 or later. If one cannot update, we recommend to use the "streaming" API as opposed to the "one-shot" API, and impose chunk size limits.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
TIMLEGGE · IO::Compress::BrotliWant to know if your infrastructure is exposed to this?
Talk to TrueHacking →References
https://github.com/advisories/GHSA-5v8v-66v8-mwm7https://github.com/google/brotli/commit/223d80cfbec8fd346e32906c732c8ede21f0cea6https://github.com/google/brotli/pull/826https://github.com/timlegge/perl-IO-Compress-Brotli/blob/8b44c83b23bb4658179e1494af4b725a1bc476bc/Changes#L52https://nvd.nist.gov/vuln/detail/CVE-2020-8927