PT-2016-3620 · Linux+1 · Linux Kernel+1

Wade Mealing · Published 2015-06-09 · Updated 2016-05-06 · CVE-2015-4177

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 collect mounts function in fs/namespace.c, which does not properly handle the case when it executes after a path has been unmounted. This allows local users with user-namespace root access to cause a denial of service, resulting in a system crash, by making an MNT DETACH umount2 system call.

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-2015-4177

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/cd4a40174b71acd021877341684d8bb1dc8ea4ae · 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
• https://advisories.mageia.org/MGASA-2015-0386.html · Security Note