CVE-2021-29488

Name	CVE-2021-29488
Description	SABnzbd is an open source binary newsreader. A vulnerability was discovered in SABnzbd that could trick the `filesystem.renamer()` function into writing downloaded files outside the configured Download Folder via malicious PAR2 files. A patch was released as part of SABnzbd 3.2.1RC1. As a workaround, limit downloads to NZBs without PAR2 files, deny write permissions to the SABnzbd process outside areas it must access to perform its job, or update to a fixed version.
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
sabnzbdplus (PTS)	buster/contrib	2.3.6+dfsg-1+deb10u2	fixed
	bullseye/contrib	3.1.1+dfsg-2+deb11u1	fixed
	bookworm/contrib	3.7.1+dfsg-2	fixed
	trixie/contrib, sid/contrib	4.2.3+dfsg-1	fixed

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

Package	Type	Release	Fixed Version	Urgency
sabnzbdplus	source	stretch	(unfixed)	end-of-life
sabnzbdplus	source	buster	2.3.6+dfsg-1+deb10u2
sabnzbdplus	source	bullseye	3.1.1+dfsg-2+deb11u1
sabnzbdplus	source	(unstable)	3.2.1+dfsg-1

Notes

[stretch] - sabnzbdplus <end-of-life> (Minor issue; contrib not supported)
https://github.com/sabnzbd/sabnzbd/security/advisories/GHSA-jwj3-wrvf-v3rp
https://github.com/sabnzbd/sabnzbd/commit/3766ba54026eaa520dbee5b57a2f33d4954fb98b