CVE-2021-23192

NameCVE-2021-23192
DescriptionA flaw was found in the way samba implemented DCE/RPC. If a client to a Samba server sent a very large DCE/RPC request, and chose to fragment it, an attacker could replace later fragments with their own data, bypassing the signature requirements.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDSA-5003-1

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
sambasourcestretch(not affected)
sambasourcebuster(not affected)
sambasourcebullseye2:4.13.13+dfsg-1~deb11u2DSA-5003-1
sambasource(unstable)2:4.13.14+dfsg-1

Notes

[buster] - samba <not-affected> (Vulnerable code introduced later)
[stretch] - samba <not-affected> (Vulnerable code introduced later)
https://bugzilla.samba.org/show_bug.cgi?id=14875
https://www.samba.org/samba/security/CVE-2021-23192.html

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