vulnwire
8.4high

CVE-2016-28561 exploit

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 be…

Published 10 y ago · modified 4 mo ago · JSON

CVSS
8.4
v3.0 · NVD
CISA KEV
No
not known exploited
EPSS
1.0%
percentile 64%
Public exploits
1
Exploit-DB

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.

Exploit prediction (EPSS)

1.03% probability of exploitation in the next 30 days, higher than 64% of all scored CVEs.

Exploits and detections

  • EDB-41760 Ubuntu < 15.10 - PT Chown Arbitrary PTs Access Via User Namespace Privilege Escalation · local · 2016-02-22

CVSS scores

Assigned byVersionScoreVector
NVD3.08.4CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD2.07.2AV:L/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-264 Permissions, Privileges, and Access Controls

References

  • halfdog.net /Security/2015/PtChownArbitraryPtsAccessViaUserNamespace/ · x_refsource_MISC, x_transferred
  • anonscm.debian.org /cgit/pkg-glibc/glibc.git/commit/?h=jessie&id=11475c083282c1582c4dd72eecfcb2b7d308c958 · x_refsource_CONFIRM, x_transferred
  • openwall.com /lists/oss-security/2016/03/07/2 · mailing-list, x_refsource_MLIST, x_transferred
  • securityfocus.com /bid/84601 · vdb-entry, x_refsource_BID, x_transferred
  • ubuntu.com /usn/USN-2985-2 · vendor-advisory, x_refsource_UBUNTU, x_transferred
  • people.canonical.com /~ubuntu-security/cve/2016/CVE-2016-2856.html · x_refsource_CONFIRM, x_transferred
  • anonscm.debian.org /cgit/pkg-glibc/glibc.git/commit/?h=jessie&id=09f7764882a81e13e7b5d87d715412283a6ce403 · x_refsource_CONFIRM, x_transferred
  • openwall.com /lists/oss-security/2016/02/23/3 · mailing-list, x_refsource_MLIST, x_transferred
  • ubuntu.com /usn/USN-2985-1 · vendor-advisory, x_refsource_UBUNTU, x_transferred

Sources

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.