CVE-2010-4020

NameCVE-2010-4020
DescriptionMIT Kerberos 5 (aka krb5) 1.8.x through 1.8.3 does not reject RC4 key-derivation checksums, which might allow remote authenticated users to forge a (1) AD-SIGNEDPATH or (2) AD-KDC-ISSUED signature, and possibly gain privileges, by leveraging the small key space that results from certain one-byte stream-cipher operations.
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 severitylow
Debian Bugs605553

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
krb5 (PTS)stretch1.15-1+deb9u1fixed
stretch (security)1.15-1+deb9u2fixed
buster, buster (security)1.17-3+deb10u1fixed
bullseye, sid1.18.3-5fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
krb5sourcelenny(not affected)
krb5source(unstable)1.8.3+dfsg-3605553

Notes

[lenny] - krb5 <not-affected> (Only affects krb5 >= 1.8)

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