Vulnerability Description
The epoll_ctl system call in fs/eventpoll.c in the Linux kernel before 3.2.24 does not properly handle ELOOP errors in EPOLL_CTL_ADD operations, which allows local users to cause a denial of service (file-descriptor consumption and system crash) via a crafted application that attempts to create a circular epoll dependency. NOTE: this vulnerability exists because of an incorrect fix for CVE-2011-1083.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 3.2.23 |
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=
- http://secunia.com/advisories/51164
- http://ubuntu.com/usn/usn-1529-1
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.24
- http://www.openwall.com/lists/oss-security/2012/07/04/2
- http://www.securitytracker.com/id?1027237
- https://bugzilla.redhat.com/show_bug.cgi?id=837502
- https://downloads.avaya.com/css/P8/documents/100165733
- https://github.com/torvalds/linux/commit/13d518074a952d33d47c428419693f63389547eExploit
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=
- http://secunia.com/advisories/51164
- http://ubuntu.com/usn/usn-1529-1
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.24
- http://www.openwall.com/lists/oss-security/2012/07/04/2
- http://www.securitytracker.com/id?1027237
FAQ
What is CVE-2012-3375?
CVE-2012-3375 is a vulnerability with a CVSS score of 4.9 (MEDIUM). The epoll_ctl system call in fs/eventpoll.c in the Linux kernel before 3.2.24 does not properly handle ELOOP errors in EPOLL_CTL_ADD operations, which allows local users to cause a denial of service (...
How severe is CVE-2012-3375?
CVE-2012-3375 has been rated MEDIUM with a CVSS base score of 4.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2012-3375?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.