CVE-2019-6133

NameCVE-2019-6133
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 advisories/code/issues, web search, more)
ReferencesDLA-1644-1, DLA-1799-1
Debian Bugs918985

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)buster4.19.249-2fixed
buster (security)4.19.260-1fixed
bullseye5.10.140-1fixed
bullseye (security)5.10.149-2fixed
bookworm6.0.10-1fixed
sid6.0.10-2fixed
policykit-1 (PTS)buster, buster (security)0.105-25+deb10u1fixed
bullseye (security), bullseye0.105-31+deb11u1fixed
bookworm, sid122-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsourcejessie3.16.68-1DLA-1799-1
linuxsourcestretch4.9.161-1
linuxsource(unstable)4.19.16-1
policykit-1sourcejessie0.105-15~deb8u4DLA-1644-1
policykit-1source(unstable)0.105-25918985

Notes

[stretch] - policykit-1 <no-dsa> (Minor issue, kernel mitigation will land in next 4.9.x rebase)
https://bugs.chromium.org/p/project-zero/issues/detail?id=1692
https://gitlab.freedesktop.org/polkit/polkit/merge_requests/19
https://gitlab.freedesktop.org/polkit/polkit/commit/c898fdf4b1aafaa04f8ada9d73d77c8bb76e2f81
Issue can be mitigated in kernel with
https://git.kernel.org/linus/7b55851367136b1efd84d98fea81ba57a98304cf (landed in 4.9.150)

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