OpenBSD VGA graphics driver for wscons privilege escalation
| openbsd-vga-privilege-escalation (31276) |  High Risk |
Description:
OpenBSD could allow a local attacker to gain elevated privileges, caused by the improper validation in the VGA graphics driver for wscons. If the kernel contains the PCIAGP option and the device is not compatible with AGP, a local attacker could exploit this vulnerability to gain root privileges on the vulnerable system.
*CVSS:
| Base Score: | 5.6 |
| Access Vector: | Local |
| Access Complexity: | High |
| Authentication: | Not Required |
| Confidentiality Impact: | Complete |
| Integrity Impact: | Complete |
| Availability Impact: | Complete |
| Temporal Score: | 4.6 |
| Exploitability: | Functional |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Gain Privileges
Remedy:
For OpenBSD version 4.0:
Apply the patch for this vulnerability (007_vga.patch), as listed in the OpenBSD 4.0 errata. See References.
For OpenBSD version 3.9:
Apply the patch for this vulnerability (017_vga.patch), as listed in the OpenBSD 3.9 errata. See References.
References:
- OpenBSD 3.9 errata: 017: SECURITY FIX: January 3, 2007 .
- OpenBSD 4.0 errata: 007: SECURITY FIX: January 3, 2007 .
- CVE-2007-0085: Unspecified vulnerability in sys/dev/pci/vga_pci.c in the VGA graphics driver for wscons in OpenBSD 3.9 and 4.0, when the kernel is compiled with the PCIAGP option and a non-AGP device is being used, allows local users to gain privileges via unspecified vectors, possibly related to agp_ioctl NULL pointer reference.
- OSVDB ID: 32574: OpenBSD sys/dev/pci/vga_pci.c VGA Driver for wscons Local Privilege Escalation
- SA23608: OpenBSD "vga" Privilege Escalation Vulnerability
- SECTRACK ID: 1017468: OpenBSD Kernel Input Validation Flaw in vga() Lets Local Users Gain Root Privileges
Platforms Affected:
- OpenBSD OpenBSD 3.9
- OpenBSD OpenBSD 4.0
Reported:
Jan 03, 2007
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 the author/distributor (IBM Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.
For corrections or additions please email xforce@iss.net
* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
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.