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CVE-2015-2830

Published: 03 April 2015

arch/x86/kernel/entry_64.S in the Linux kernel before 3.19.2 does not prevent the TS_COMPAT flag from reaching a user-mode task, which might allow local users to bypass the seccomp or audit protection mechanism via a crafted application that uses the (1) fork or (2) close system call, as demonstrated by an attack against seccomp before 3.16.

From the Ubuntu security team

A privilege escalation was discovered in the fork syscall via the int80 entry on 64 bit kernels with 32 bit emulation support. An unprivileged local attacker could exploit this flaw to increase their privileges on the system.

Priority

Medium

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc3)
Patches:
Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Fixed by 956421fbb74c3a6261903f3836c0740187cf038b
linux-armadaxp
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc3)
This package is not directly supported by the Ubuntu Security Team
linux-aws
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc3)
linux-ec2
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc3)
linux-flo
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc3)
linux-fsl-imx51
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc3)
linux-gke
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc3)
linux-goldfish
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc3)
linux-grouper
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc3)
linux-hwe
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc3)
linux-hwe-edge
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc3)
linux-linaro-omap
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc3)
linux-linaro-shared
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc3)
linux-linaro-vexpress
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc3)
linux-lts-quantal
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc3)
This package is not directly supported by the Ubuntu Security Team
linux-lts-raring
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc3)
linux-lts-saucy
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc3)
This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc3)
linux-lts-utopic
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc3)
linux-lts-vivid
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc3)
linux-lts-wily
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc3)
linux-lts-xenial
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc3)
linux-maguro
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc3)
linux-mako
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc3)
linux-manta
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc3)
linux-mvl-dove
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc3)
linux-qcm-msm
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc3)
linux-raspi2
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc3)
linux-snapdragon
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc3)
linux-ti-omap4
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc3)