VDB
PYSEC-2020-29
PYSEC-2020-29
PUBLISHED
CVSS 9.300000190734863 CRITICAL
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. It is recommended to update your Brotli library to 1.0.8 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.
Risk Scores
CVSS v4.0
9.300000190734863
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| PyPI | brotli | 0, 0.5.2, 0.6.0 |
Timeline
- Sep 15, 2020 CVE Published
- Sep 4, 2025 CVE Updated
- May 1, 2026 Distribution Patch
- May 1, 2026 Security Advisory
References
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00108.html url
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MMBKACMLSRX7JJSKBTR35UOEP2WFR6QP/ url
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WW62OZEY2GHJL4JCOLJRBSRETXDHMWRK/ url
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/M4VCDOJGL6BK3HB4XRD2WETBPYX2ITF6/ url
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/J4E265WKWKYMK2RYYSIXBEGZTDY5IQE6/ url
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/W23CUADGMVMQQNFKHPHXVP7RPZJZNN6I/ url
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/356JOYTWW4BWSZ42SEFLV7NYHL3S3AEH/ url
- https://github.com/google/brotli/releases/tag/v1.0.9 fix
- https://usn.ubuntu.com/4568-1/ advisory
- https://lists.debian.org/debian-lts-announce/2020/12/msg00003.html advisory
- https://www.debian.org/security/2020/dsa-4801 advisory