PyPI: brotli
CVE-2020-8927
Safety vulnerability ID: SFTY-20200915-78403
Safety legacy ID: pyup.io-42299
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 Brotli library to 1.0.8 or later. If one cannot update, it is recommended to use the "streaming" API as opposed to the "one-shot" API, and impose chunk size limits.
Overview
Integer overflow in the bundled Brotli C library
Advisory
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 Brotli library to 1.0.8 or later. If one cannot update, it is recommended to use the "streaming" API as opposed to the "one-shot" API, and impose chunk size limits.
How to Fix
Mitigation and Workarounds
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Vulnerable Functions
Functions linked to known vulnerabilities.
References
- https://getsafety.com/vulnerabilities/SFTY-20200915-78403/CVE-2020-8927
- https://nvd.nist.gov/vuln/detail/CVE-2020-8927
- https://github.com/google/brotli/releases/tag/v1.0.9
- https://lists.debian.org/debian-lts-announce/2020/12/msg00003.html
- https://www.debian.org/security/2020/dsa-4801
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00108.html
- https://github.com/bitemyapp/brotli2-rs/issues/45
- https://rustsec.org/advisories/RUSTSEC-2021-0131.html
- https://rustsec.org/advisories/RUSTSEC-2021-0132.html
- https://github.com/github/advisory-database/issues/785
- https://github.com/google/brotli/commit/223d80cfbec8fd346e32906c732c8ede21f0cea6
- https://usn.ubuntu.com/4568-1
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZXEQ3GQVELA2T4HNZG7VPMS2HDVXMJRG
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WW62OZEY2GHJL4JCOLJRBSRETXDHMWRK
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/W23CUADGMVMQQNFKHPHXVP7RPZJZNN6I
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MQLM7ABVCYJLF6JRPF3M3EBXW63GNC27
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MMBKACMLSRX7JJSKBTR35UOEP2WFR6QP
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/M4VCDOJGL6BK3HB4XRD2WETBPYX2ITF6
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/J4E265WKWKYMK2RYYSIXBEGZTDY5IQE6
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4TOGTZ2ZWDH662ZNFFSZVL3M5AJXV6JF
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/356JOYTWW4BWSZ42SEFLV7NYHL3S3AEH
- https://github.com/pypa/advisory-database/tree/main/vulns/brotli/PYSEC-2020-29.yaml
- https://github.com/google/brotli/releases/tag/v1.0.8
- https://github.com/advisories/GHSA-5v8v-66v8-mwm7
Verified by Safety
Our Cybersecurity Intelligence Team reviewed this vulnerability. We combine public data with our own research to find issues not yet reported to public sources.
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