CVE-2022-48566

Advisory

Python 3.6.13, 3.7.10, 3.8.7, 3.9.1 and 3.10.0a3 include a fix for CVE-2022-48566: Observable Timing Discrepancy vulnerability in compare_digest in Lib/hmac.py. The fix includes constant-time-defeating optimizations were possible in the accumulator variable in hmac.compare_digest.
https://bugs.python.org/issue40791

Affected package

Affected versions

Fixed versions

Vulnerability changelog

An issue was discovered in compare_digest in Lib/hmac.py in Python through 3.9.1. Constant-time-defeating optimisations were possible in the accumulator variable in hmac.compare_digest. See CVE-2022-48566.


MISC:https://bugs.python.org/issue40791: https://bugs.python.org/issue40791

Resources

• https://bugs.python.org/issue40791
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-48566
• https://lists.debian.org/debian-lts-announce/2023/09/msg00022.html
• https://security.netapp.com/advisory/ntap-20231006-0013/
• https://lists.debian.org/debian-lts-announce/2023/10/msg00017.html