PT-2016-1519 · Gnu+1 · Glibc+1

Martin Carpenter · Published 2016-03-13 · Updated 2016-11-28 · CVE-2016-2856

Positive Technologies (AI Summary)

CVSS v3.1

8.4

High

Base vector

AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions glibc versions prior to 2.19-18+deb8u4 on Debian jessie glibc versions prior to 2.15-0ubuntu10.14 on Ubuntu 12.04 LTS glibc versions prior to 2.19-0ubuntu6.8 on Ubuntu 14.04 LTS glibc versions prior to 2.21-0ubuntu4.2 on Ubuntu 15.10 glibc versions prior to 2.23-0ubuntu1 on Ubuntu 16.04 LTS and 16.10

Description The issue is related to the pt chown function in the glibc package, which lacks a namespace check associated with file-descriptor passing. This allows local users to capture keystrokes and spoof data, and possibly gain privileges, via pts read and write operations. The problem is related to debian/sysdeps/linux.mk.

Recommendations For glibc versions prior to 2.19-18+deb8u4 on Debian jessie, update to version 2.19-18+deb8u4 or later. For glibc versions prior to 2.15-0ubuntu10.14 on Ubuntu 12.04 LTS, update to version 2.15-0ubuntu10.14 or later. For glibc versions prior to 2.19-0ubuntu6.8 on Ubuntu 14.04 LTS, update to version 2.19-0ubuntu6.8 or later. For glibc versions prior to 2.21-0ubuntu4.2 on Ubuntu 15.10, update to version 2.21-0ubuntu4.2 or later. For glibc versions prior to 2.23-0ubuntu1 on Ubuntu 16.04 LTS and 16.10, update to version 2.23-0ubuntu1 or later.

Exploit

Fix

Weakness Enumeration

CWE-264

Related Identifiers

BDU:2016-00820

CVE-2016-2856

USN-2985-1

USN-2985-2

Affected Products

Ubuntu

Glibc

References · 35

• 🔥 https://exploit-db.com/exploits/41760 · Exploit
• https://security-tracker.debian.org/tracker/CVE-2016-2856 · Vendor Advisory
• https://bdu.fstec.ru/vul/2016-00820 · Security Note
• https://ubuntu.com/security/CVE-2015-5277 · Vendor Advisory
• https://ubuntu.com/security/CVE-2014-9761 · Vendor Advisory
• https://osv.dev/vulnerability/USN-2985-1 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-2985-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2016-2856 · Security Note
• https://ubuntu.com/security/CVE-2014-8121 · Vendor Advisory
• https://ubuntu.com/security/CVE-2015-8776 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2016-2856 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2016-2856 · Vendor Advisory
• https://ubuntu.com/security/CVE-2016-2856 · Vendor Advisory
• https://ubuntu.com/security/CVE-2016-3075 · Vendor Advisory
• https://ubuntu.com/security/CVE-2015-8777 · Vendor Advisory