| Name | CVE-2023-23931 |
| Description | cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. In affected versions `Cipher.update_into` would accept Python objects which implement the buffer protocol, but provide only immutable buffers. This would allow immutable objects (such as `bytes`) to be mutated, thus violating fundamental rules of Python and resulting in corrupted output. This now correctly raises an exception. This issue has been present since `update_into` was originally introduced in cryptography 1.8. |
| 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-3331-1, DLA-3331-2 |
| Debian Bugs | 1031049 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| python-cryptography (PTS) | jessie | 0.6.1-1+deb8u1 | fixed |
| stretch | 1.7.1-3+deb9u2 | fixed |
| buster | 2.6.1-3+deb10u2 | vulnerable |
| buster (security) | 2.6.1-3+deb10u4 | fixed |
| bullseye | 3.3.2-1 | vulnerable |
| bookworm | 38.0.4-3 | fixed |
| bookworm (security) | 38.0.4-3~deb12u1 | vulnerable |
| sid, trixie | 42.0.5-2 | fixed |
The information below is based on the following data on fixed versions.
Notes
[bullseye] - python-cryptography <no-dsa> (Minor issue)
https://github.com/pyca/cryptography/security/advisories/GHSA-w7pp-m8wf-vj6r
https://github.com/pyca/cryptography/commit/9fbf84efc861668755ab645530ec7be9cf3c6696
[stretch] - python-cryptography <not-affected> (The vulnerable code was introduced later)
[jessie] - python-cryptography <not-affected> (The vulnerable code was introduced later)