CVE - CVE-2016-2856

CVE-ID
CVE-2016-2856	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
BID:84601 URL:http://www.securityfocus.com/bid/84601 CONFIRM:http://anonscm.debian.org/cgit/pkg-glibc/glibc.git/commit/?h=jessie&id=09f7764882a81e13e7b5d87d715412283a6ce403 CONFIRM:http://anonscm.debian.org/cgit/pkg-glibc/glibc.git/commit/?h=jessie&id=11475c083282c1582c4dd72eecfcb2b7d308c958 CONFIRM:http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-2856.html MISC:http://www.halfdog.net/Security/2015/PtChownArbitraryPtsAccessViaUserNamespace/ MLIST:[oss-security] 20160223 Access to /dev/pts devices via pt_chown and user namespaces URL:http://www.openwall.com/lists/oss-security/2016/02/23/3 MLIST:[oss-security] 20160306 Re: Access to /dev/pts devices via pt_chown and user namespaces URL:http://www.openwall.com/lists/oss-security/2016/03/07/2 UBUNTU:USN-2985-1 URL:http://www.ubuntu.com/usn/USN-2985-1 UBUNTU:USN-2985-2 URL:http://www.ubuntu.com/usn/USN-2985-2
Assigning CNA
MITRE Corporation
Date Record Created
20160306	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20160306)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
This is an record on the CVE List, which provides common identifiers for publicly known cybersecurity vulnerabilities.
Search CVE Using Keywords: You can also search by reference using the CVE Reference Maps.
For More Information: CVE Request Web Form (select "Other" from dropdown)