NameCVE-2011-4407 in Software Properties before does not validate the server certificate when downloading PPA GPG key fingerprints, which allows man-in-the-middle (MITM) attackers to spoof GPG keys for a package repository.
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
software-properties (PTS)bullseye0.96.20.2-2.1fixed
sid, trixie0.99.30-4.1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
software-propertiessourcelenny(not affected)
software-propertiessourcesqueeze(not affected)


[squeeze] - software-properties <not-affected> (Vulnerable code not present)
[lenny] - software-properties <not-affected> (Vulnerable code not present)

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