CVEvulnerability
CVE-2016-2856
8.4 HIGH
Official page ↗
- Status
- Modified
- Published
- 2016-03-14
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.0 ([email protected])
- 8.4 HIGH — CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 7.2 HIGH — AV:L/AC:L/Au:N/C:C/I:C/A:C
- Weaknesses
- CWE-264
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.
Affected configurations
• canonical ubuntu linux 12.04
• canonical ubuntu linux 14.04
• canonical ubuntu linux 15.10
• debian debian linux 8.0
Related
Weakness · not in database (1)
References
- http://anonscm.debian.org/cgit/pkg-glibc/glibc.git/commit/?h=jessie&id=09f7764882a81e13e7b5d87d715412283a6ce403 anonscm.debian.org
- http://anonscm.debian.org/cgit/pkg-glibc/glibc.git/commit/?h=jessie&id=11475c083282c1582c4dd72eecfcb2b7d308c958 anonscm.debian.org
- http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-2856.html people.canonical.com
- http://www.halfdog.net/Security/2015/PtChownArbitraryPtsAccessViaUserNamespace/ www.halfdog.net
- http://www.openwall.com/lists/oss-security/2016/02/23/3 www.openwall.com
- http://www.openwall.com/lists/oss-security/2016/03/07/2 www.openwall.com
- http://www.securityfocus.com/bid/84601 www.securityfocus.com
- http://www.ubuntu.com/usn/USN-2985-1 www.ubuntu.com
- http://www.ubuntu.com/usn/USN-2985-2 www.ubuntu.com
- http://anonscm.debian.org/cgit/pkg-glibc/glibc.git/commit/?h=jessie&id=09f7764882a81e13e7b5d87d715412283a6ce403 anonscm.debian.org
- http://anonscm.debian.org/cgit/pkg-glibc/glibc.git/commit/?h=jessie&id=11475c083282c1582c4dd72eecfcb2b7d308c958 anonscm.debian.org
- http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-2856.html people.canonical.com
- http://www.halfdog.net/Security/2015/PtChownArbitraryPtsAccessViaUserNamespace/ www.halfdog.net
- http://www.openwall.com/lists/oss-security/2016/02/23/3 www.openwall.com
- http://www.openwall.com/lists/oss-security/2016/03/07/2 www.openwall.com
- http://www.securityfocus.com/bid/84601 www.securityfocus.com
- http://www.ubuntu.com/usn/USN-2985-1 www.ubuntu.com
- http://www.ubuntu.com/usn/USN-2985-2 www.ubuntu.com