CVE-2019-12760

Name	CVE-2019-12760
Description	A deserialization vulnerability exists in the way parso through 0.4.0 handles grammar parsing from the cache. Cache loading relies on pickle and, provided that an evil pickle can be written to a cache grammar file and that its parsing can be triggered, this flaw leads to Arbitrary Code Execution. NOTE: This is disputed because "the cache directory is not under control of the attacker in any common configuration.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	930356

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
parso (PTS)	buster	0.3.1-1	vulnerable
	bullseye	0.8.1-1	fixed
	sid, trixie, bookworm	0.8.3-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
parso	source	(unstable)	0.5.1-0.1	unimportant		930356

Notes

https://gist.github.com/dhondta/f71ae7e5c4234f8edfd2f12503a5dcc7
https://github.com/davidhalter/parso/issues/75
Not considered a security issue by upstream