| Name | CVE-2023-27043 |
| Description | The 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-3966-1, DLA-3980-1 |
| Debian Bugs | 1059298, 1059299, 1072179 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| pypy3 (PTS) | bullseye | 7.3.5+dfsg-2+deb11u2 | vulnerable |
| bullseye (security) | 7.3.5+dfsg-2+deb11u4 | fixed |
| bookworm | 7.3.11+dfsg-2+deb12u2 | vulnerable |
| sid, trixie | 7.3.17+dfsg-3 | fixed |
| python2.7 (PTS) | bullseye | 2.7.18-8+deb11u1 | vulnerable |
| python3.11 (PTS) | bookworm | 3.11.2-6+deb12u4 | vulnerable |
| bookworm (security) | 3.11.2-6+deb12u3 | vulnerable |
| python3.12 (PTS) | sid, trixie | 3.12.8-3 | fixed |
| python3.9 (PTS) | bullseye | 3.9.2-1 | vulnerable |
| bullseye (security) | 3.9.2-1+deb11u2 | fixed |
The information below is based on the following data on fixed versions.
Notes
[bookworm] - python3.11 <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)
[bookworm] - pypy3 <postponed> (Minor issue, wait until upstream has decided whether to backport to older branches)
[buster] - pypy3 <postponed> (Minor issue)
https://github.com/python/cpython/issues/102988
https://github.com/python/cpython/commit/15068242bd4405475f70a81805a8895ca309a310 (v3.12.6)
https://github.com/python/cpython/commit/bc4a703a934a59657ecd018320ef990bc5542803 (v3.11.10)
https://github.com/python/cpython/commit/2a9273a0e4466e2f057f9ce6fe98cd8ce570331b (v3.10.15)
https://github.com/python/cpython/commit/ee953f2b8fc12ee9b8209ab60a2f06c603e5a624 (v3.9.20)