CVE-2020-36846criticalCWE-1395

CVE-2020-36846: critical vulnerability in TIMLEGGE IO::Compress::Brotli

IO::Compress::Brotli versions prior to 0.007 for Perl have an integer overflow in the bundled Brotli C library

Published

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28Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 9.8epss 0.7%
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::Brotli