PT-2018-6786 · Linux+1 · Linux Kernel+1

Published 2017-09-14 · Updated 2019-10-03 · CVE-2017-18261

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 4.13

Description: The issue allows local users to cause a denial of service, specifically infinite recursion, under certain circumstances. This can be achieved by writing to a file under /sys/kernel/debug, and a scenario involving debugfs, ftrace, PREEMPT TRACER, and FUNCTION GRAPH TRACER has been demonstrated.

Recommendations: For versions prior to 4.13, update to version 4.13 or later to resolve the issue. As a temporary workaround, consider restricting access to the /sys/kernel/debug directory to minimize the risk of exploitation.

Fix

DoS

Infinite Loop

Weakness Enumeration

CWE-835

Related Identifiers

ALT-PU-2017-2206

ALT-PU-2018-1991

CVE-2017-18261

Affected Products

Alt Linux

Linux Kernel

References · 9

• https://github.com/torvalds/linux/commit/adb4f11e0a8f4e29900adb2b7af28b6bbd5c1fa4 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2017-18261 · Security Note
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=adb4f11e0a8f4e29900adb2b7af28b6bbd5c1fa4 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-18261 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2017-18261 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2017-18261 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2017-18261 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2017-18261 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2017-18261 · Vendor Advisory