Use-after-free in Linux kernel - CVE-2014-0203
Published: June 23, 2014 / Updated: August 10, 2020
Vulnerability identifier: #VU41532
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2014-0203
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local authenticated user to perform a denial of service (DoS) attack.
The __do_follow_link function in fs/namei.c in the Linux kernel before 2.6.33 does not properly handle the last pathname component during use of certain filesystems, which allows local users to cause a denial of service (incorrect free operations and system crash) via an open system call.
How to mitigate CVE-2014-0203
Install update from vendor's website.
Sources
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=86acdca1b63e6890540fa19495cfc708beff3d8b
- http://linux.oracle.com/errata/ELSA-2014-0771.html
- http://linux.oracle.com/errata/ELSA-2014-3043.html
- http://mirror.linux.org.au/linux/kernel/v2.6/ChangeLog-2.6.33
- http://secunia.com/advisories/59262
- http://secunia.com/advisories/59309
- http://secunia.com/advisories/59406
- http://secunia.com/advisories/59560
- http://www.securityfocus.com/bid/68125
- https://bugzilla.redhat.com/show_bug.cgi?id=1094363
- https://github.com/torvalds/linux/commit/86acdca1b63e6890540fa19495cfc708beff3d8b