SB2009110601 - Security restrictions bypass in Linux kernel
Published: November 6, 2009
Security Bulletin ID
SB2009110601
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Security restrictions bypass (CVE-ID: CVE-2009-3725)
The vulnerability allows a local user to execute arbitrary code.
The connector layer in the Linux kernel before 2.6.31.5 does not require the CAP_SYS_ADMIN capability for certain interaction with the (1) uvesafb, (2) pohmelfs, (3) dst, or (4) dm subsystem, which allows local users to bypass intended access restrictions and gain privileges via calls to functions in these subsystems.
Remediation
Install update from vendor's website.
References
- http://marc.info/?l=linux-kernel&m=125449888416314&w=2
- http://marc.info/?l=oss-security&m=125715484511380&w=2
- http://marc.info/?l=oss-security&m=125716192622235&w=2
- http://patchwork.kernel.org/patch/51382/
- http://patchwork.kernel.org/patch/51383/
- http://patchwork.kernel.org/patch/51384/
- http://patchwork.kernel.org/patch/51387/
- http://secunia.com/advisories/37113
- http://secunia.com/advisories/38905
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.31.5
- http://www.securityfocus.com/bid/36834
- http://www.ubuntu.com/usn/usn-864-1
- http://xorl.wordpress.com/2009/10/31/linux-kernel-multiple-capabilities-missing-checks/