DescriptionThe Debian xscreensaver 5.42+dfsg1-1 package for XScreenSaver has cap_net_raw enabled for the /usr/libexec/xscreensaver/sonar file, which allows local users to gain privileges because this is arguably incompatible with the design of the Mesa 3D Graphics library dependency.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs987149

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
xscreensaver (PTS)buster5.42+dfsg1-1fixed
sid, trixie6.08+dfsg1-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
xscreensaversourcestretch(not affected)
xscreensaversourcebuster(not affected)


[buster] - xscreensaver <not-affected> (Vulnerability introduced later)
[stretch] - xscreensaver <not-affected> (Vulnerability introduced later)
Fixed upstream in 6.00 (no public version control):
Only in 5.44+dfsg1-1 net_raw capability was added to sonar executable via postinst
and so exposing the vulnerability.

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