CVE-2024-11477

Name	CVE-2024-11477
Description	7-Zip Zstandard Decompression Integer Underflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of 7-Zip. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation. The specific flaw exists within the implementation of Zstandard decompression. The issue results from the lack of proper validation of user-supplied data, which can result in an integer underflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-24346.
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)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
7zip (PTS)	bookworm	22.01+dfsg-8+deb12u1	fixed
	trixie	24.09+dfsg-8	fixed
	forky, sid	25.01+dfsg-2	fixed
p7zip (PTS)	bookworm, bullseye	16.02+dfsg-8	fixed
	forky, trixie	16.02+transitional.1	fixed

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

Package	Type	Release	Fixed Version
7zip	source	bookworm	(not affected)
7zip	source	(unstable)	24.07+dfsg-1
p7zip	source	(unstable)	(not affected)

Notes

[bookworm] - 7zip <not-affected> (Vulnerable code introduced in 24.01)
- p7zip <not-affected> (Vulnerable code not present)
https://www.zerodayinitiative.com/advisories/ZDI-24-1532/