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CVE-2014-3215

Status Candidate

Overview

seunshare in policycoreutils 2.2.5 is owned by root with 4755 permissions, and executes programs in a way that changes the relationship between the setuid system call and the getresuid saved set-user-ID value, which makes it easier for local users to gain privileges by leveraging a program that mistakenly expected that it could permanently drop privileges.

Related Files

Red Hat Security Advisory 2015-0864-01
Posted Apr 21, 2015
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2015-0864-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. A flaw was found in the way seunshare, a utility for running executables under a different security context, used the capng_lock functionality of the libcap-ng library. The subsequent invocation of suid root binaries that relied on the fact that the setuid() system call, among others, also sets the saved set-user-ID when dropping the binaries' process privileges, could allow a local, unprivileged user to potentially escalate their privileges on the system. Note: the fix for this issue is the kernel part of the overall fix, and introduces the PR_SET_NO_NEW_PRIVS functionality and the related SELinux exec transitions support.

tags | advisory, kernel, local, root
systems | linux, redhat
advisories | CVE-2014-3215, CVE-2014-3690, CVE-2014-7825, CVE-2014-7826, CVE-2014-8171, CVE-2014-8884, CVE-2014-9529, CVE-2014-9584, CVE-2015-1421
MD5 | cb34cce50ff282a4708151c4579de7c9
Mandriva Linux Security Advisory 2015-156
Posted Mar 30, 2015
Authored by Mandriva | Site mandriva.com

Mandriva Linux Security Advisory 2015-156 - capng_lock() in libcap-ng before 0.7.4 sets securebits in an attempt to prevent regaining capabilities using setuid-root programs. This allows a user to run setuid programs, such as seunshare from policycoreutils, as uid 0 but without capabilities, which is potentially dangerous.

tags | advisory, root
systems | linux, mandriva
advisories | CVE-2014-3215
MD5 | 210615058d6da4d916b72b9aa1440ea7
Gentoo Linux Security Advisory 201412-44
Posted Dec 29, 2014
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201412-44 - A vulnerability in policycoreutils could lead to local privilege escalation. Versions prior to 2.2.5-r4 are affected.

tags | advisory, local
systems | linux, gentoo
advisories | CVE-2014-3215
MD5 | 0d8070d2e0011d91d2caec2cfd2ebbeb
Mandriva Linux Security Advisory 2014-117
Posted Jun 12, 2014
Authored by Mandriva | Site mandriva.com

Mandriva Linux Security Advisory 2014-117 - capng_lock() in libcap-ng before 0.7.4 sets securebits in an attempt to prevent regaining capabilities using setuid-root programs. This allows a user to run setuid programs, such as seunshare from policycoreutils, as uid 0 but without capabilities, which is potentially dangerous.

tags | advisory, root
systems | linux, mandriva
advisories | CVE-2014-3215
MD5 | 1386b3e50aceea3aa7590f91dc3a428e
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