CVE-2014-2851: Use After Free
First published: Fri Apr 11 2014(Updated: )
A flaw was found in the way ping_init_sock() function handled group_info struct reference counter. Since group_info refcounter is only incremented but never decremented in this codepath, it could lead to refcounter overflow and possibly to use-after-free issue later. An unprivileged local user could use this flaw to crash the system or, potentially, escalate their privileges on the system. Upstream patch proposal: <a href="https://lkml.org/lkml/2014/4/10/736">https://lkml.org/lkml/2014/4/10/736</a>
Credit: cve@mitre.org cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux kernel | >=3.0<3.2.60 | |
| Linux kernel | >=3.3<3.4.92 | |
| Linux kernel | >=3.5<3.10.41 | |
| Linux kernel | >=3.11<3.12.19 | |
| Linux kernel | >=3.13<3.14.5 | |
| Linux kernel | =3.0-rc1 | |
| Debian | =7.0 | |
| Linux kernel | <=3.14.1 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.123-1 6.1.128-1 6.12.17-1 |
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Reference Links
- http://secunia.com/advisories/59386
- http://secunia.com/advisories/59599
- http://www.debian.org/security/2014/dsa-2926
- http://www.openwall.com/lists/oss-security/2014/04/11/4
- http://www.securityfocus.com/bid/66779
- http://www.securitytracker.com/id/1030769
- https://bugzilla.redhat.com/show_bug.cgi?id=1086730
- https://git.kernel.org/cgit/linux/kernel/git/davem/net.git/commit/?id=b04c46190219a4f845e46a459e3102137b7f6cac
- https://lkml.org/lkml/2014/4/10/736
- https://launchpad.net/bugs/cve/CVE-2014-2851
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1087420
- https://rhn.redhat.com/errata/RHSA-2014-0557.html
- https://rhn.redhat.com/errata/RHSA-2014-0786.html
- https://rhn.redhat.com/errata/RHSA-2014-0981.html
- https://rhn.redhat.com/errata/RHSA-2014-1101.html
- https://cyseclabs.com/page?n=02012016
- https://security-tracker.debian.org/tracker/CVE-2014-2851
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2851
- https://nvd.nist.gov/vuln/detail/CVE-2014-2851
- https://ubuntu.com/security/CVE-2014-2851
Frequently Asked Questions
What is the severity of CVE-2014-2851?
CVE-2014-2851 is classified as a medium severity vulnerability due to potential use-after-free issues.
How do I fix CVE-2014-2851?
To fix CVE-2014-2851, update your Linux kernel to version 5.10.223-1 or later.
What systems are affected by CVE-2014-2851?
CVE-2014-2851 affects numerous Linux kernel versions from 3.0 up to 3.14.1.
Can CVE-2014-2851 be exploited remotely?
CVE-2014-2851 requires local access, so it cannot be exploited remotely by an attacker.
Is there a known attack vector for CVE-2014-2851?
The attack vector for CVE-2014-2851 involves unprivileged local users exploiting the vulnerability to cause a denial of service.
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