CVE-2017-7889

NameCVE-2017-7889
DescriptionThe mm subsystem in the Linux kernel through 4.10.10 does not properly enforce the CONFIG_STRICT_DEVMEM protection mechanism, which allows local users to read or write to kernel memory locations in the first megabyte (and bypass slab-allocation access restrictions) via an application that opens the /dev/mem file, related to arch/x86/mm/init.c and drivers/char/mem.c.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
ReferencesDSA-3945-1
NVD severityhigh (attack range: local)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)wheezy3.2.78-1vulnerable
wheezy (security)3.2.89-2vulnerable
jessie3.16.43-2+deb8u2vulnerable
jessie (security)3.16.43-2+deb8u3fixed
stretch4.9.30-2+deb9u2fixed
stretch (security)4.9.30-2+deb9u3fixed
buster, sid4.12.6-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsource(unstable)4.9.25-1high
linuxsourcejessie3.16.43-2+deb8u3highDSA-3945-1

Notes

Fixed by: https://git.kernel.org/linus/a4866aa812518ed1a37d8ea0c881dc946409de94 (v4.11-rc7)

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