| Name | CVE-2020-36242 |
| Description | In the cryptography package before 3.3.2 for Python, certain sequences of update calls to symmetrically encrypt multi-GB values could result in an integer overflow and buffer overflow, as demonstrated by the Fernet class. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
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, buster (lts) | 2.6.1-3+deb10u5 | fixed |
| buster (security) | 2.6.1-3+deb10u4 | fixed |
| bullseye | 3.3.2-1 | fixed |
| bullseye (security) | 3.3.2-1+deb11u1 | fixed |
| bookworm | 38.0.4-3+deb12u1 | fixed |
| bookworm (security) | 38.0.4-3~deb12u1 | fixed |
| sid, trixie | 43.0.0-1 | fixed |
The information below is based on the following data on fixed versions.
Notes
[buster] - python-cryptography <no-dsa> (Minor issue)
[stretch] - python-cryptography <not-affected> (Vulnerable code introduced later)
https://github.com/pyca/cryptography/issues/5615
[buster] - python-cryptography <not-affected> (Vulnerable code introduced later)
[jessie] - python-cryptography <not-affected> (Vulnerable code introduced later)
Introduced by: https://github.com/pyca/cryptography/commit/f90ba1808ee9bd9a13c5673b776484644f29d7ba (3.1)