Linux kernel fcntl_setlk() and close() denial of service
| linux-kernel-fcntlsetlk-dos (42242) |  Low Risk |
Description:
Linux kernel is vulnerable to a denial of service, caused by an error while preventing a race condition in the SMP system between the fcntl_setlk() and close() calls. A local attacker could exploit this vulnerability to gain reordered access to the descriptor table and file_lock structure of an inode and cause the kernel to crash.
Platforms Affected:
- Canonical, Ubuntu 6.06 LTS
- Canonical, Ubuntu 7.04
- Canonical, Ubuntu 7.10
- Canonical, Ubuntu 8.04 LTS
- Debian, Debian Linux 4.0
- Linux, Kernel 2.6.11.10
- Linux, Kernel 2.6.11.12
- Linux, Kernel 2.6.11.4
- Linux, Kernel 2.6.11.5
- Linux, Kernel 2.6.11.6
- Linux, Kernel 2.6.11.7
- Linux, Kernel 2.6.11.8
- Linux, Kernel 2.6.11.9
- Linux, Kernel 2.6.15
- Linux, Kernel 2.6.18
- Linux, Kernel 2.6.20
- Linux, Kernel 2.6.20.1
- Linux, Kernel 2.6.20.11
- Linux, Kernel 2.6.20.13
- Linux, Kernel 2.6.20.2
- Linux, Kernel 2.6.20.3
- Linux, Kernel 2.6.21 rc6
- Linux, Kernel 2.6.21
- Linux, Kernel 2.6.21 rc7
- Linux, Kernel 2.6.21 rc5
- Linux, Kernel 2.6.21 rc4
- Linux, Kernel 2.6.21 rc3
- Linux, Kernel 2.6.23.1
- Linux, Kernel 2.6.23.14
- Linux, Kernel 2.6.23.9
- Linux, Kernel 2.6.24 rc2
- MandrakeSoft, Mandrake Linux 2007.1
- MandrakeSoft, Mandrake Linux 2007.1 X86_64
- MandrakeSoft, Mandrake Linux 2008.0 X86_64
- MandrakeSoft, Mandrake Linux 2008.0
- MandrakeSoft, Mandrake Linux 2008.1 X86_64
- MandrakeSoft, Mandrake Linux 2008.1
- MandrakeSoft, Mandrake Linux Corporate Server 3.0 X86_64
- MandrakeSoft, Mandrake Linux Corporate Server 3.0
- MandrakeSoft, Mandrake Linux Corporate Server 4.0
- MandrakeSoft, Mandrake Linux Corporate Server 4.0 X86_64
- MandrakeSoft, Mandrake Multi Network Firewall 2.0
- Novell, OpenSUSE 10.2
- Novell, OpenSUSE 10.3
- Novell, SLE SDK 10 SP1
- Novell, SLE SDK 10 SP2
- Novell, SUSE Linux Enterprise 10 SP1 DEBUGINFO
- Novell, SUSE Linux Enterprise 10 SP2 DEBUGINFO
- Novell, SUSE Linux Enterprise Desktop 10 SP1
- Novell, SUSE Linux Enterprise Desktop 10 SP2
- Novell, SUSE Linux Enterprise Server 10 SP1
- Novell, SUSE Linux Enterprise Server 10 SP2
- RedHat, Enterprise Linux 3 AS
- RedHat, Enterprise Linux 3 Desktop
- RedHat, Enterprise Linux 3 ES
- RedHat, Enterprise Linux 3 WS
- RedHat, Enterprise Linux 4 Desktop
- RedHat, Enterprise Linux 4 AS
- RedHat, Enterprise Linux 4 ES
- RedHat, Enterprise Linux 4 WS
- RedHat, Enterprise Linux 5
- RedHat, Enterprise Linux 5 Client
Remedy:
Upgrade to the latest version of Linux kernel (2.6.25.2 or later), available from the The Linux Kernel Archives Web site. See References.
Consequences:
Denial of Service
References:
- The Linux Kernel Archives Web site, ChangeLog-2.6.25.2 at http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.25.2.
- The Linux Kernel Archives Web site, The Linux Kernel Archives at http://kernel.org/.
- ASA-2008-203: kernel security and bug fix update (RHSA-2008-0211)
- ASA-2008-225: kernel security and bug fix update (RHSA-2008-0237)
- BID-29076: Linux Kernel 'fcntl_setlk()' SMP Ordering Local Denial of Service Vulnerability
- CVE-2008-1669: Linux kernel before 2.6.25.2 does not apply a certain protection mechanism for fcntl functionality, which allows local users to (1) execute code in parallel or (2) exploit a race condition to obtain re-ordered access to the descriptor table.
- DSA-1575: linux-2.6 -- denial of service
- MDVSA-2008:104: Updated kernel packages fix vulnerabilities
- MDVSA-2008:105: Updated kernel packages fix vulnerabilities
- MDVSA-2008:167: kernel
- RHSA-2008-0211: Important: kernel security and bug fix update
- RHSA-2008-0233: Important: kernel security and bug fix update
- RHSA-2008-0237: Important: kernel security and bug fix update
- SA30101: Linux Kernel "fcntl_setlk()" SMP Reordered Access Vulnerability
- SA30108: Linux Kernel Multiple Vulnerabilities
- SA31246: VMware ESX Server update for Samba and vmnix
- SECTRACK ID: 1019974: Linux Kernel fcntl_setlk() Race Condition May Let Local Users Gain Elevated Privileges
- SUSE-SA:2008:030: Linux kernel security update
- SUSE-SA:2008:032: SUSE Linux Enterprise 10 SP1 Linux kernel
- SUSE-SA:2008:035: Linux kernel update
- SUSE-SA:2008:038: Linux kernel security update
- USN-614-1: Linux kernel vulnerabilities
- USN-618-1: Linux kernel vulnerabilities
- VUPEN/ADV-2008-1451: Linux Kernel fcntl_setlk() and close() Race Prevention Vulnerability
- VUPEN/ADV-2008-1452: Linux Kernel Privilege Escalation and Denial of Service Vulnerabilities
- VUPEN/ADV-2008-2222: VMware ESX Server Security Update Fixes Multiple Vulnerabilities
Reported:
May 06, 2008
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