CVE-2016-2856
Description
pt_chown in the glibc package before 2.19-18+deb8u4 on Debian jessie; the elibc package before 2.15-0ubuntu10.14 on Ubuntu 12.04 LTS and before 2.19-0ubuntu6.8 on Ubuntu 14.04 LTS; and the glibc package before 2.21-0ubuntu4.2 on Ubuntu 15.10 and before 2.23-0ubuntu1 on Ubuntu 16.04 LTS and 16.10 lacks a namespace check associated with file-descriptor passing, which allows local users to capture keystrokes and spoof data, and possibly gain privileges, via pts read and write operations, related to debian/sysdeps/linux.mk. NOTE: this is not considered a vulnerability in the upstream GNU C Library because the upstream documentation has a clear security recommendation against the --enable-pt_chown option.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
7cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*+ 2 more
- cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
9- anonscm.debian.org/cgit/pkg-glibc/glibc.git/commit/nvd
- anonscm.debian.org/cgit/pkg-glibc/glibc.git/commit/nvd
- people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-2856.htmlnvd
- www.halfdog.net/Security/2015/PtChownArbitraryPtsAccessViaUserNamespace/nvd
- www.openwall.com/lists/oss-security/2016/02/23/3nvd
- www.openwall.com/lists/oss-security/2016/03/07/2nvd
- www.securityfocus.com/bid/84601nvd
- www.ubuntu.com/usn/USN-2985-1nvd
- www.ubuntu.com/usn/USN-2985-2nvd
News mentions
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