CVE-2021-31800

Name	CVE-2021-31800
Description	Multiple path traversal vulnerabilities exist in smbserver.py in Impacket through 0.9.22. An attacker that connects to a running smbserver instance can list and write to arbitrary files via ../ directory traversal. This could potentially be abused to achieve arbitrary code execution by replacing /etc/shadow or an SSH authorized key.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severity	high
Debian Bugs	988141

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
impacket (PTS)	stretch	0.9.15-1	vulnerable
	buster	0.9.15-5	vulnerable
	bullseye, sid	0.9.22-2	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
impacket	source	(unstable)	0.9.22-2			988141

Notes

[buster] - impacket <no-dsa> (Minor issue)
[stretch] - impacket <no-dsa> (Minor issue)
https://github.com/SecureAuthCorp/impacket/commit/49c643bf66620646884ed141c94e5fdd85bcdd2f