CVE-2014-9529: Race Condition
First published: Wed Jan 07 2015(Updated: )
It was reported [1] that the Linux kernel suffered from a flaw when doing key garbage collection. The patch [1] describes the issue as: """ When a key is being garbage collected, it's key->user would get put before the ->destroy() callback is called, where the key is removed from it's respective tracking structures. This leaves a key hanging in a semi-invalid state which leaves a window open for a different task to try an access key->user. An example is find_keyring_by_name() which would dereference key->user for a key that is in the process of being garbage collected (where key->user was freed but ->destroy() wasn't called yet - so it's still present in the linked list). """ An unprivileged local user could use this flaw to crash the system. [1] <a href="http://marc.info/?l=linux-kernel&m=141986398232547&w=2">http://marc.info/?l=linux-kernel&m=141986398232547&w=2</a>
Credit: cve@mitre.org cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | <3.2.67 | |
| Linux Kernel | >=3.3<3.4.107 | |
| Linux Kernel | >=3.5<3.10.67 | |
| Linux Kernel | >=3.11<=3.12.37 | |
| Linux Kernel | >=3.13<=3.14.31 | |
| Linux Kernel | >=3.15<3.16.35 | |
| Linux Kernel | >=3.17<3.18.5 | |
| Red Hat Enterprise Linux Desktop | =6.0 | |
| Red Hat Enterprise Linux Desktop | =7.0 | |
| Red Hat Enterprise Linux Server | =6.0 | |
| Red Hat Enterprise Linux Server | =7.0 | |
| Red Hat Enterprise Linux Server | =6.6 | |
| Red Hat Enterprise Linux Server | =7.3 | |
| Red Hat Enterprise Linux Server | =7.4 | |
| Red Hat Enterprise Linux Server | =7.6 | |
| Red Hat Enterprise Linux Server | =7.7 | |
| Red Hat Enterprise Linux Server | =6.6 | |
| Red Hat Enterprise Linux Server | =7.1 | |
| Red Hat Enterprise Linux Server | =7.2 | |
| Red Hat Enterprise Linux Server | =7.3 | |
| Red Hat Enterprise Linux Server | =7.4 | |
| Red Hat Enterprise Linux Server | =7.5 | |
| Red Hat Enterprise Linux Server | =7.6 | |
| Red Hat Enterprise Linux Server | =7.7 | |
| Red Hat Enterprise Linux Server | =6.6 | |
| Red Hat Enterprise Linux Server | =7.3 | |
| Red Hat Enterprise Linux Server | =7.6 | |
| Red Hat Enterprise Linux Server | =7.7 | |
| Red Hat Enterprise Linux Workstation | =6.0 | |
| Red Hat Enterprise Linux Workstation | =7.0 | |
| openSUSE | =13.1 | |
| Red Hat Fedora | =20 | |
| Red Hat Fedora | =21 | |
| Debian Linux | =7.0 | |
| Debian Linux | =8.0 | |
| Ubuntu | =10.04 | |
| Ubuntu | =12.04 | |
| Ubuntu | =14.04 | |
| Ubuntu | =14.10 | |
| Linux Kernel | <=3.18.2 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.128-1 6.12.20-1 6.12.21-1 |
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Reference Links
- http://www.openwall.com/lists/oss-security/2015/01/06/10
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a3a8784454692dd72e5d5d34dcdab17b4420e74c
- https://bugzilla.redhat.com/show_bug.cgi?id=1179813
- https://github.com/torvalds/linux/commit/a3a8784454692dd72e5d5d34dcdab17b4420e74c
- http://www.ubuntu.com/usn/USN-2511-1
- http://www.ubuntu.com/usn/USN-2512-1
- http://www.ubuntu.com/usn/USN-2515-1
- http://www.ubuntu.com/usn/USN-2516-1
- http://www.ubuntu.com/usn/USN-2517-1
- http://www.ubuntu.com/usn/USN-2518-1
- http://www.debian.org/security/2015/dsa-3128
- http://www.ubuntu.com/usn/USN-2513-1
- http://www.ubuntu.com/usn/USN-2514-1
- http://www.mandriva.com/security/advisories?name=MDVSA-2015:058
- http://lists.fedoraproject.org/pipermail/package-announce/2015-January/147973.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-January/147864.html
- http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00009.html
- http://www.securityfocus.com/bid/71880
- http://www.securitytracker.com/id/1036763
- https://exchange.xforce.ibmcloud.com/vulnerabilities/99641
- http://rhn.redhat.com/errata/RHSA-2015-0864.html
- http://rhn.redhat.com/errata/RHSA-2015-1137.html
- http://rhn.redhat.com/errata/RHSA-2015-1138.html
- https://launchpad.net/bugs/cve/CVE-2014-9529
- http://marc.info/?l=linux-kernel&m=141986398232547&w=2
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1179853
- https://rhn.redhat.com/errata/RHSA-2015-0864.html
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/security/keys/gc.c?id=a3a8784454692dd72e5d5d34dcdab17b4420e74c
- https://rhn.redhat.com/errata/RHSA-2015-1139.html
- https://rhn.redhat.com/errata/RHSA-2015-1138.html
- https://rhn.redhat.com/errata/RHSA-2015-1137.html
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a3a8784454692dd72e5d5d34dcdab17b4420e74c
- http://marc.info/?l=linux-kernel&m=142047362307894&w=2
- https://security-tracker.debian.org/tracker/CVE-2014-9529
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-9529
- https://nvd.nist.gov/vuln/detail/CVE-2014-9529
- https://ubuntu.com/security/CVE-2014-9529
Frequently Asked Questions
What is the severity of CVE-2014-9529?
CVE-2014-9529 has a medium severity rating due to its potential impact on system integrity during key garbage collection.
How do I fix CVE-2014-9529?
To fix CVE-2014-9529, update to a patched version of the Linux kernel, specifically version 5.10.223-1 or later.
Which versions of the Linux kernel are affected by CVE-2014-9529?
CVE-2014-9529 affects Linux kernel versions up to 3.18.2, including various version ranges between 3.2.67 and 3.18.x.
Is CVE-2014-9529 specific to any Linux distributions?
Yes, CVE-2014-9529 impacts multiple distributions including Red Hat, Debian, and Ubuntu with specific version ranges.
What are the potential consequences of CVE-2014-9529 if left unpatched?
If CVE-2014-9529 is left unpatched, it may allow unauthorized access to sensitive information or system compromise during key management operations.
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