CVE-2021-20251

NameCVE-2021-20251
DescriptionA flaw was found in samba. A race condition in the password lockout code may lead to the risk of brute force attacks being successful if special conditions are met.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, 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 PackageReleaseVersionStatus
samba (PTS)buster2:4.9.5+dfsg-5+deb10u3vulnerable
buster (security)2:4.9.5+dfsg-5+deb10u4vulnerable
bullseye (security), bullseye2:4.13.13+dfsg-1~deb11u5vulnerable
bookworm, bookworm (security)2:4.17.12+dfsg-0+deb12u1fixed
trixie2:4.19.5+dfsg-1fixed
sid2:4.19.5+dfsg-2fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
sambasourceexperimental2:4.17.1+dfsg-1
sambasource(unstable)2:4.17.2+dfsg-3

Notes

[bullseye] - samba <ignored> (Domain controller functionality is EOLed, see DSA DSA-5477-1)
https://bugzilla.samba.org/show_bug.cgi?id=14611
https://gitlab.com/samba-team/samba/-/merge_requests/2708

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