PT-2016-3621 · Linux+1 · Linux Kernel+1

Wade Mealing · Published 2015-06-09 · Updated 2016-05-06 · CVE-2015-4178

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 4.0.5

Description The issue is related to the fs pin implementation in the Linux kernel, which does not ensure the internal consistency of a certain list data structure. This allows local users with user-namespace root access to cause a denial of service, resulting in a system crash, by leveraging an MNT DETACH umount2 system call. The issue is related to the fs/fs pin.c and include/linux/fs pin.h files.

Recommendations For Linux kernel versions prior to 4.0.5, update to version 4.0.5 or later to resolve the issue.

Exploit

Fix

Related Identifiers

ALT-PU-2015-1505

ALT-PU-2015-1849

CVE-2015-4178

MGASA-2015-0386

MGASA-2015-0390

MGASA-2016-0015

Affected Products

Alt Linux

Linux Kernel

References · 136

• 🔥 https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/local/overlayfs_priv_esc.rb · Exploit
• 🔥 https://github.com/fi01/CVE-2015-3636 · Exploit
• 🔥 https://github.com/android-rooting-tools/libpingpong_exploit · Exploit
• 🔥 https://github.com/a7vinx/CVE-2015-3636 · Exploit
• 🔥 https://github.com/askk/libping_unhash_exploit_POC · Exploit
• 🔥 https://github.com/hhj4ck/CVE-2016-2067 · Exploit
• 🔥 https://github.com/elit3pwner/CVE-2015-1328-GoldenEye · Exploit
• 🔥 https://github.com/x1ns4n3/CVE-2015-1328-GoldenEye · Exploit
• 🔥 https://github.com/0x1ns4n3/CVE-2015-1328-GoldenEye · Exploit
• 🔥 https://github.com/betalphafai/CVE-2015-0568 · Exploit
• 🔥 https://github.com/betalphafai/cve-2015-3636_crash · Exploit
• https://github.com/torvalds/linux/commit/820f9f147dcce2602eefd9b575bbbd9ea14f0953 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6787 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-8019 · Security Note
• http://openwall.com/lists/oss-security/2015/05/29/5 · Patch