Linux kernel sys_utimensat() denial of service
| linux-kernel-sysutimensat-dos (42342) |  Low Risk |
Description:
Linux kernel is vulnerable to a denial of service, caused by improper permissions checking by the sys_utimensat() function. By invoking the function with both times set to UTIME_NOW or UTIME_NOW and UTIME_OMIT, a local attacker could exploit this vulnerability to cause the kernel to crash.
*CVSS:
| Base Score: | 2.1 |
| Access Vector: | Local |
| Access Complexity: | Low |
| Authentication: | None |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Partial |
| Temporal Score: | 1.6 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
Remedy:
Upgrade to the latest version of Linux kernel (2.6.25.3 or later), available from the Linux Kernel Archives Web site. See References.
References:
- The Linux Kernel Archives Web site: The Linux Kernel Archives.
- The Linux Kernel Archives Web site: ChangeLog-2.6.25.3.
- BID-29134: Linux Kernel 'sys_utimensat' Local Denial of Service Vulnerability
- CVE-2008-2148: The utimensat system call (sys_utimensat) in Linux kernel 2.6.22 and other versions before 2.6.25.3 does not check file permissions when certain UTIME_NOW and UTIME_OMIT combinations are used, which allows local users to modify file times of arbitrary files, possibly leading to a denial of service.
- MDVSA-2008:167: kernel
- RHSA-2008-0585: Important: kernel security and bug fix update
- SA30241: Linux Kernel Multiple Vulnerabilities
- SUSE-SA:2008:030: Linux kernel security update
- USN-625-1: Linux kernel vulnerabilities
- VUPEN/ADV-2008-1543: Linux Kernel Denial of Service and Security Bypass Vulnerabilities
Platforms Affected:
- Canonical Ubuntu 6.06 LTS
- Canonical Ubuntu 7.04
- Canonical Ubuntu 7.10
- Canonical Ubuntu 8.04 LTS
- Linux Kernel 2.6.22
- Linux Kernel 2.6.22.1
- Linux Kernel 2.6.22.10
- Linux Kernel 2.6.22.11
- Linux Kernel 2.6.22.12
- Linux Kernel 2.6.22.13
- Linux Kernel 2.6.22.14
- Linux Kernel 2.6.22.15
- Linux Kernel 2.6.22.16
- Linux Kernel 2.6.22.17
- Linux Kernel 2.6.22.18
- Linux Kernel 2.6.22.19
- Linux Kernel 2.6.22.2
- Linux Kernel 2.6.22.20
- Linux Kernel 2.6.22.21
- Linux Kernel 2.6.22.3
- Linux Kernel 2.6.22.4
- Linux Kernel 2.6.22.5
- Linux Kernel 2.6.22.6
- Linux Kernel 2.6.22.7
- Linux Kernel 2.6.22.8
- Linux Kernel 2.6.22.9
- Linux Kernel 2.6.23
- Linux Kernel 2.6.23.2
- Linux Kernel 2.6.23.5
- Linux Kernel 2.6.23.6
- Linux Kernel 2.6.23.7
- Linux Kernel 2.6.24 rc3
- Linux Kernel 2.6.24 rc2
- MandrakeSoft Mandrake Linux 2008.1 X86_64
- MandrakeSoft Mandrake Linux 2008.1
- Novell OpenSUSE 10.2
- Novell OpenSUSE 10.3
- RedHat Enterprise Linux 4 WS
- RedHat Linux Advanced Workstation 2.1 Itanium
Reported:
May 09, 2008
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.