Linux Kernel mq_open mnt_count double decrement denial of service
| kernel-double-decrement-dos (25302) |  Low Risk |
Description:
Linux Kernel is vulnerable to a denial of service, caused by an unspecified vulnerability in the mq_open system call that could cause mnt_count value to be decremented twice. A local attacker could exploit this vulnerability by making multiple calls to the mntput function to cause a kernel panic.
Platforms Affected:
- Canonical, Ubuntu 4.10
- Canonical, Ubuntu 5.04
- Canonical, Ubuntu 5.10
- Debian, Debian Linux 3.1
- Linux, Kernel 2.6.9
- MandrakeSoft, Mandrake Linux 2006 X86_64
- MandrakeSoft, Mandrake Linux 2006
- RedHat, Enterprise Linux 3 ES
- RedHat, Enterprise Linux 4 WS
- RedHat, Enterprise Linux 4 Desktop
- RedHat, Enterprise Linux 4 AS
- RedHat, Enterprise Linux 4 ES
- SuSE, SuSE Linux 10.0
- SuSE, SuSE Linux 9.2
Remedy:
Upgrade to the latest stable version of Linux Kernel (2.6.15.6 or later), available from The Linux Kernel Archives. See References.
For Debian GNU/Linux:
Refer to DSA-1017-1 for patch, upgrade, or suggested workaround information. See References.
For Red Hat Linux:
Refer to RHSA-2006:0101-9 for upgrade information. See References.
For SUSE Linux:
Refer to SUSE Security Announcement SUSE-SA:2006:006 for upgrade information. See References.
For Mandrivalinux:
Refer to Mandriva Security Advisory MDKSA-2006:040 for upgrade information. See References.
For Ubuntu:
Refer to USN-244-1 for upgrade information. See References.
For other distributions:
Contact your vendor for upgrade information.
Consequences:
Denial of Service
References:
- Red Hat Bugzilla Bug 169130, CVE-2005-3356 double decrement of mqueue_mnt->mnt_count in sys_mq_open at https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=169130.
- The Linux Kernel Archives Web site, The Linux Kernel Archives at http://www.kernel.org.
- BID-16283: Linux Kernel mq_open System Call Unspecified Denial of Service Vulnerability
- CVE-2005-3356: The mq_open system call in Linux kernel 2.6.9, in certain situations, can decrement a counter twice (double decrement) as a result of multiple calls to the mntput function when the dentry_open function call fails, which allows local users to cause a denial of service (panic) via unspecified attack vectors.
- DSA-1017: kernel-source-2.6.8 -- several vulnerabilities
- MDKSA-2006:040: Updated kernel packages fix multiple vulnerabilities
- RHSA-2006-0101: kernel security update
- SUSE-SA:2006:006: kernel remote denial of service attack
- USN-244-1: Linux kernel vulnerabilities
Reported:
Sep 23, 2005
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