PT-2018-3520 · Linux+2 · Linux Kernel+2

Po-Ning Tseng + 1 · Published 2018-07-26 · Updated 2020-06-10 · CVE-2018-14611

Positive Technologies (AI Summary)

CVSS v2.0

7.1

High

Base vector

AV:N/AC:M/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions: Linux kernel versions prior to 4.17.10

Description: The issue is related to a use-after-free error in the try merge free space() function of the Linux kernel, specifically when mounting a crafted btrfs image. This occurs due to a lack of chunk type flag checks in btrfs check chunk valid in fs/btrfs/volumes.c. Exploitation of this issue may allow an attacker to cause a denial of service.

Recommendations: For Linux kernel versions prior to 4.17.10, update to version 4.17.10 or later to resolve the issue. As a temporary workaround, consider restricting the mounting of btrfs images from untrusted sources to minimize the risk of exploitation.

Exploit

Fix

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

ALT-PU-2018-2092

ALT-PU-2018-2094

ALT-PU-2019-1433

BDU:2020-03261

CVE-2018-14611

DLA-1715-1

DLA-2241-1

DLA-2241-2

USN-3932-1

USN-3932-2

USN-4094-1

USN-4118-1

Affected Products

Alt Linux

Linux Kernel

Ubuntu

References · 109

• 🔥 https://bugzilla.kernel.org/show_bug.cgi?id=199839 · Exploit
• https://osv.dev/vulnerability/USN-4094-1 · Vendor Advisory
• https://usn.ubuntu.com/4094-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-13093 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-14614 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-7222 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-20511 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-13631 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-15220 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2018-14611 · Vendor Advisory
• https://osv.dev/vulnerability/USN-3932-1 · Vendor Advisory
• https://bdu.fstec.ru/vul/2020-03261 · Security Note
• https://usn.ubuntu.com/4118-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-15214 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-9506 · Vendor Advisory