PT-2016-3144 · Linux+2 · Linux Kernel+2

Published 2016-05-13 · Updated 2023-01-17 · CVE-2016-9754

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 prior to 4.6.1

Description The issue is related to the ring buffer resize function in the kernel's profiling subsystem, which mishandles certain integer calculations. This can be exploited by local users to gain privileges by writing to the /sys/kernel/debug/tracing/buffer size kb file. The vulnerability is caused by an integer overflow or cyclic shift, allowing a local attacker to elevate their privileges.

Recommendations For Linux kernel versions prior to 4.6.1, update to version 4.6.1 or later to resolve the issue. As a temporary workaround, consider restricting access to the /sys/kernel/debug/tracing/buffer size kb file to minimize the risk of exploitation.

Exploit

Fix

Integer Overflow

Weakness Enumeration

CWE-190

Related Identifiers

ALT-PU-2016-1570

ALT-PU-2016-1572

BDU:2017-01659

CVE-2016-9754

USN-3422-1

USN-3422-2

Affected Products

Alt Linux

Linux Kernel

Ubuntu

References · 42

• 🔥 http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=59643d1535eb220668692a5359de22545af579f6 · Exploit
• https://github.com/torvalds/linux/commit/59643d1535eb220668692a5359de22545af579f6 · Vendor Advisory
• https://ubuntu.com/security/CVE-2016-10044 · Vendor Advisory
• https://ubuntu.com/security/CVE-2016-9754 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2016-9754 · Vendor Advisory
• https://ubuntu.com/security/CVE-2016-9604 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2016-9754 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2016-9754 · Security Note
• https://ubuntu.com/security/notices/USN-3422-2 · Vendor Advisory
• https://ubuntu.com/security/CVE-2016-9178 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2016-9754 · Security Note
• https://ubuntu.com/security/CVE-2017-5970 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-1000251 · Vendor Advisory
• https://bdu.fstec.ru/vul/2017-01659 · Security Note
• https://ubuntu.com/security/CVE-2016-7097 · Vendor Advisory