PT-2016-5242 · Linux+2 · Linux Kernel+2

Halfdog · Published 2016-05-02 · Updated 2022-03-22 · CVE-2016-2854

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel versions 3.x through 4.x

Description The issue concerns the aufs module in the Linux kernel, which fails to properly maintain POSIX ACL xattr data. This allows local users to gain privileges by exploiting a group-writable setgid directory.

Recommendations For Linux kernel versions 3.x through 4.x, consider restricting access to group-writable setgid directories to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Improper Privilege Management

Weakness Enumeration

CWE-269

Related Identifiers

ALT-PU-2019-1437

ALT-PU-2019-1506

ALT-PU-2020-1198

ALT-PU-2020-1501

ALT-PU-2020-2410

ALT-PU-2020-2433

ALT-PU-2021-1870

CVE-2016-2854

USN-5343-1

Affected Products

Alt Linux

Linux Kernel

Ubuntu

References · 58

• 🔥 https://exploit-db.com/exploits/41761 · Exploit
• 🔥 http://openwall.com/lists/oss-security/2016/02/24/9 · Exploit
• 🔥 http://halfdog.net/Security/2016/AufsPrivilegeEscalationInUserNamespaces · Exploit
• https://ubuntu.com/security/CVE-2021-3564 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-23134 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-26555 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-39648 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-33034 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-3612 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-0129 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2016-2854 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-25670 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-3573 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-12655 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-25672 · Vendor Advisory