CVE-2023-27043

NameCVE-2023-27043
DescriptionThe email module of Python through 3.11.3 incorrectly parses e-mail addresses that contain a special character. The wrong portion of an RFC2822 header is identified as the value of the addr-spec. In some applications, an attacker can bypass a protection mechanism in which application access is granted only after verifying receipt of e-mail to a specific domain (e.g., only @company.example.com addresses may be used for signup). This occurs in email/_parseaddr.py in recent versions of Python.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs1059298, 1059299

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
python2.7 (PTS)buster2.7.16-2+deb10u1vulnerable
buster (security)2.7.16-2+deb10u3vulnerable
bullseye2.7.18-8+deb11u1vulnerable
python3.10 (PTS)sid3.10.13-1vulnerable
python3.11 (PTS)bookworm3.11.2-6vulnerable
trixie3.11.8-1vulnerable
sid3.11.8-2vulnerable
python3.12 (PTS)trixie3.12.2-1vulnerable
sid3.12.2-2vulnerable
python3.7 (PTS)buster3.7.3-2+deb10u3vulnerable
buster (security)3.7.3-2+deb10u6vulnerable
python3.9 (PTS)bullseye3.9.2-1vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
python2.7source(unstable)(unfixed)
python3.10source(unstable)(unfixed)
python3.11source(unstable)(unfixed)1059298
python3.12source(unstable)(unfixed)1059299
python3.7source(unstable)(unfixed)
python3.9source(unstable)(unfixed)

Notes

[bookworm] - python3.11 <postponed> (Minor issue, wait until upstream has decided whether to backport to older branches)
[bullseye] - python3.9 <postponed> (Minor issue, wait until upstream has decided whether to backport to older branches)
[buster] - python3.7 <postponed> (Minor issue)
[bullseye] - python2.7 <ignored> (Unsupported in Bullseye, only included to build a few applications)
[buster] - python2.7 <postponed> (Minor issue)
https://github.com/python/cpython/issues/102988

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