DescriptionIn PolicyKit (aka polkit) 0.115, the "start time" protection mechanism can be bypassed because fork() is not atomic, and therefore authorization decisions are improperly cached. This is related to lack of uid checking in polkitbackend/polkitbackendinteractiveauthority.c.
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 (attack range: local)
Debian Bugs918985

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
policykit-1 (PTS)jessie0.105-15~deb8u2vulnerable
jessie (security)0.105-15~deb8u4fixed
stretch (security), stretch0.105-18+deb9u1vulnerable
buster, sid0.105-25fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs


[stretch] - policykit-1 <no-dsa> (Minor issue, kernel mitigation will land in next 4.9.x rebase)
Issue can be mitigated in kernel with (landed in 4.9.150)

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