CVE-2015-7799

NameCVE-2015-7799
DescriptionThe slhc_init function in drivers/net/slip/slhc.c in the Linux kernel through 4.2.3 does not ensure that certain slot numbers are valid, which allows local users to cause a denial of service (NULL pointer dereference and system crash) via a crafted PPPIOCSMAXCID ioctl call.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-360-1, DSA-3426-1
NVD severitymedium (attack range: local)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)wheezy3.2.78-1fixed
wheezy (security)3.2.93-1fixed
jessie3.16.43-2+deb8u2fixed
jessie (security)3.16.43-2+deb8u5fixed
stretch4.9.51-1fixed
stretch (security)4.9.30-2+deb9u5fixed
buster, sid4.13.4-2fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsource(unstable)4.2.6-2medium
linuxsourcejessie3.16.7-ckt20-1+deb8u1mediumDSA-3426-1
linuxsourcewheezy3.2.73-2+deb7u1mediumDSA-3426-1
linux-2.6source(unstable)(unfixed)medium
linux-2.6sourcesqueeze2.6.32-48squeeze17mediumDLA-360-1

Notes

https://code.google.com/p/android/issues/detail?id=187973
DoS, requires access to /dev/ppp which is root-only by default
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0baa57d8dc32db78369d8b5176ef56c5e2e18ab3
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4ab42d78e37a294ac7bc56901d563c642e03c4ae

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