CVE-2020-36846
A buffer overflow, as described in CVE-2020-8927, exists in the embedded Brotli library.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.63%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.63% probability · 48th percentile
- CISA KEV
- Not listed
- Source
- 9b29abf9-4ab0-4765-b253-1875cd9b441e
References
- https://github.com/advisories/GHSA-5v8v-66v8-mwm7
- https://github.com/google/brotli/commit/223d80cfbec8fd346e32906c732c8ede21f0cea6
- https://github.com/google/brotli/pull/826
- https://github.com/timlegge/perl-IO-Compress-Brotli/blob/8b44c83b23bb4658179e1494af4b725a1bc476bc/Changes#L52
- https://nvd.nist.gov/vuln/detail/CVE-2020-8927
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.