PT-2016-4069 · Linux+1 · Linux Kernel+1

Ulrich Obergfell · Published 2015-11-10 · Updated 2016-11-28 · CVE-2015-8953

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 4.2.6

Description The issue is related to an incorrect cleanup code path in the fs/overlayfs/copy up.c file, which can cause a denial of service due to a dentry reference leak. This occurs when local users perform filesystem operations on a large file in a lower overlayfs layer.

Recommendations For Linux kernel versions prior to 4.2.6, update to version 4.2.6 or later to resolve the issue.

Exploit

Fix

DoS

Weakness Enumeration

CWE-399

Related Identifiers

ALT-PU-2015-1968

ALT-PU-2016-1485

CVE-2015-8953

Affected Products

Alt Linux

Linux Kernel

References · 108

• 🔥 https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/local/overlayfs_priv_esc.rb · Exploit
• 🔥 https://github.com/xairy/kernel-exploits/tree/master/CVE-2016-2384 · Exploit
• 🔥 https://github.com/Kagami/docker_cve-2015-2925 · Exploit
• 🔥 https://github.com/whu-enjoy/CVE-2015-8660 · Exploit
• 🔥 http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ab79efab0a0ba01a74df782eb7fa44b044dae8b5 · Exploit
• 🔥 http://openwall.com/lists/oss-security/2016/08/23/9 · Exploit
• https://github.com/torvalds/linux/commit/ab79efab0a0ba01a74df782eb7fa44b044dae8b5 · Patch
• https://ubuntu.com/security/CVE-2015-8953 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-6937 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2015-8953 · Vendor Advisory
• https://bdu.fstec.ru/vul/2016-00545 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2069 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2925 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-8963 · Security Note
• https://cve.org/CVERecord?id=CVE-2015-8953 · Security Note