CVE-2021-37750

NameCVE-2021-37750
DescriptionThe Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.18.5 and 1.19.x before 1.19.3 has a NULL pointer dereference in kdc/do_tgs_req.c via a FAST inner body that lacks a server field.
SourceCVE (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 severitymedium
Debian Bugs992607

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
krb5 (PTS)stretch1.15-1+deb9u1vulnerable
stretch (security)1.15-1+deb9u2vulnerable
buster1.17-3+deb10u1vulnerable
buster (security)1.17-3+deb10u2vulnerable
bullseye1.18.3-6vulnerable
bookworm, sid1.18.3-7fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
krb5source(unstable)1.18.3-7992607

Notes

[bullseye] - krb5 <no-dsa> (Minor issue)
[buster] - krb5 <no-dsa> (Minor issue)
https://github.com/krb5/krb5/commit/d775c95af7606a51bf79547a94fa52ddd1cb7f49

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