CVE-2023-3347

NameCVE-2023-3347
DescriptionA vulnerability was found in Samba's SMB2 packet signing mechanism. The SMB2 packet signing is not enforced if an admin configured "server signing = required" or for SMB2 connections to Domain Controllers where SMB2 packet signing is mandatory. This flaw allows an attacker to perform attacks, such as a man-in-the-middle attack, by intercepting the network traffic and modifying the SMB2 messages between client and server, affecting the integrity of the data.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDSA-5477-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
samba (PTS)buster2:4.9.5+dfsg-5+deb10u3fixed
buster (security)2:4.9.5+dfsg-5+deb10u5fixed
bullseye2:4.13.13+dfsg-1~deb11u5fixed
bullseye (security)2:4.13.13+dfsg-1~deb11u6fixed
bookworm, bookworm (security)2:4.17.12+dfsg-0+deb12u1fixed
trixie2:4.19.5+dfsg-1fixed
sid2:4.19.6+dfsg-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
sambasourcebuster(not affected)
sambasourcebullseye(not affected)
sambasourcebookworm2:4.17.10+dfsg-0+deb12u1DSA-5477-1
sambasource(unstable)2:4.18.5+dfsg-1

Notes

[bullseye] - samba <not-affected> (Vulnerable code not present)
[buster] - samba <not-affected> (Vulnerable code not present)
https://www.samba.org/samba/security/CVE-2023-3347.html

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