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CVE-2015-7799

Published: 19 October 2015

The 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.

From the Ubuntu Security Team

郭永刚 discovered that the ppp implementation in the Linux kernel did not ensure that certain slot numbers are valid. A local attacker with the privilege to call ioctl() on /dev/ppp could cause a denial of service (system crash).

Notes

AuthorNote
tyhicks
/dev/ppp is only writable by root in Ubuntu
jdstrand
android kernels (flo, goldfish, grouper, maguro, mako and manta) are
not supported on the Ubuntu Touch 14.10 and earlier preview kernels
linux-lts-saucy no longer receives official support
linux-lts-quantal no longer receives official support
Priority

Negligible

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
upstream
Released (4.4~rc1)
Patches:
Introduced by

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

Fixed by 0baa57d8dc32db78369d8b5176ef56c5e2e18ab3
Introduced by

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

Fixed by 4ab42d78e37a294ac7bc56901d563c642e03c4ae
linux-armadaxp
Launchpad, Ubuntu, Debian
upstream
Released (4.4~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-aws
Launchpad, Ubuntu, Debian
upstream
Released (4.4~rc1)
linux-ec2
Launchpad, Ubuntu, Debian
upstream
Released (4.4~rc1)
linux-flo
Launchpad, Ubuntu, Debian
upstream
Released (4.4~rc1)
linux-fsl-imx51
Launchpad, Ubuntu, Debian
upstream
Released (4.4~rc1)
linux-gke
Launchpad, Ubuntu, Debian
upstream
Released (4.4~rc1)
linux-goldfish
Launchpad, Ubuntu, Debian
upstream
Released (4.4~rc1)
linux-grouper
Launchpad, Ubuntu, Debian
upstream
Released (4.4~rc1)
linux-hwe
Launchpad, Ubuntu, Debian
upstream
Released (4.4~rc1)
linux-hwe-edge
Launchpad, Ubuntu, Debian
upstream
Released (4.4~rc1)
linux-linaro-omap
Launchpad, Ubuntu, Debian
upstream
Released (4.4~rc1)
linux-linaro-shared
Launchpad, Ubuntu, Debian
upstream
Released (4.4~rc1)
linux-linaro-vexpress
Launchpad, Ubuntu, Debian
upstream
Released (4.4~rc1)
linux-lts-quantal
Launchpad, Ubuntu, Debian
upstream
Released (4.4~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-lts-raring
Launchpad, Ubuntu, Debian
upstream
Released (4.4~rc1)
linux-lts-saucy
Launchpad, Ubuntu, Debian
upstream
Released (4.4~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian
upstream
Released (4.4~rc1)
linux-lts-utopic
Launchpad, Ubuntu, Debian
upstream
Released (4.4~rc1)
linux-lts-vivid
Launchpad, Ubuntu, Debian
upstream
Released (4.4~rc1)
linux-lts-wily
Launchpad, Ubuntu, Debian
upstream
Released (4.4~rc1)
linux-lts-xenial
Launchpad, Ubuntu, Debian
upstream
Released (4.4~rc1)
linux-maguro
Launchpad, Ubuntu, Debian
upstream
Released (4.4~rc1)
linux-mako
Launchpad, Ubuntu, Debian
upstream
Released (4.4~rc1)
linux-manta
Launchpad, Ubuntu, Debian
upstream
Released (4.4~rc1)
linux-mvl-dove
Launchpad, Ubuntu, Debian
upstream
Released (4.4~rc1)
linux-qcm-msm
Launchpad, Ubuntu, Debian
upstream
Released (4.4~rc1)
linux-raspi2
Launchpad, Ubuntu, Debian
upstream
Released (4.4~rc1)
linux-snapdragon
Launchpad, Ubuntu, Debian
upstream
Released (4.4~rc1)
linux-ti-omap4
Launchpad, Ubuntu, Debian
upstream
Released (4.4~rc1)