CVE-2012-3375

MEDIUM

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.

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=13d518074a952d33d47c428419693f63389547e9

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/13d518074a952d33d47c428419693f63389547e9

Details

Source: MITRE

Published: 2012-10-03

Updated: 2013-08-17

Risk Information

CVSS v2.0

Base Score: 4.9

Vector: (AV:L/AC:L/Au:N/C:N/I:N/A:C)

Impact Score: 6.9

Exploitability Score: 3.9

Severity: MEDIUM