CVE-2020-36242

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)	buster	2.6.1-3+deb10u2	vulnerable
	buster (security)	2.6.1-3+deb10u4	vulnerable
	bullseye	3.3.2-1	fixed
	bookworm	38.0.4-3	fixed
	bookworm (security)	38.0.4-3~deb12u1	fixed
	trixie	41.0.7-4	fixed
	sid	42.0.5-2	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
python-cryptography	source	stretch	(not affected)
python-cryptography	source	(unstable)	3.3.2-1

Notes

[buster] - python-cryptography <no-dsa> (Minor issue)
[stretch] - python-cryptography <not-affected> (Vulnerable code introduced later)
https://github.com/pyca/cryptography/issues/5615