CVE-2021-40524

Name	CVE-2021-40524
Description	In Pure-FTPd before 1.0.50, an incorrect max_filesize quota mechanism in the server allows attackers to upload files of unbounded size, which may lead to denial of service or a server hang. This occurs because a certain greater-than-zero test does not anticipate an initial -1 value. (Versions 1.0.23 through 1.0.49 are affected.)
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	993810

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
pure-ftpd (PTS)	bullseye	1.0.49-4.1	vulnerable
	bookworm	1.0.50-2.1	fixed
	forky, sid, trixie	1.0.50-2.2	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
pure-ftpd	source	(unstable)	1.0.50-1			993810

Notes

[bullseye] - pure-ftpd <no-dsa> (Minor issue)
[buster] - pure-ftpd <no-dsa> (Minor issue)
[stretch] - pure-ftpd <no-dsa> (Minor issue)
https://github.com/jedisct1/pure-ftpd/pull/158