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OpenBSD "vga" Privilege Escalation Vulnerability
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Secunia Advisory:
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SA23608
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Release Date:
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2007-01-04
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Last Update:
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2007-01-18
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Popularity:
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8,207 views
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Critical:
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Less critical
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Impact:
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Privilege escalation
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Where:
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Local system
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Solution Status:
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Vendor Patch
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| OS: | OpenBSD 3.x
OpenBSD 4.0
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Subscribe:
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Instant alerts on relevant vulnerabilities 
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| | CVE reference: | CVE-2007-0085
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Description:
A vulnerability has been reported in OpenBSD, which can be exploited by malicious, local users to gain escalated privileges.
The vulnerability is caused due to an input validation error in sys/dev/pci/vga_pci.c of "vga" (VGA graphics driver for wscons), which can be exploited to gain escalated privileges.
Successful exploitation may allow to gain root privileges, but requires that the kernel is compiled with "option PCIAGP" (by default only available for i386) and that the device is not AGP compatible.
The vulnerability is reported in OpenBSD 3.9 and 4.0. Other versions may also be affected.
Solution:
Apply patch.
OpenBSD 3.9:
ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.9/i386/017_agp.patch
OpenBSD 4.0:
ftp://ftp.openbsd.org/pub/OpenBSD/patches/4.0/i386/007_agp.patch
Provided and/or discovered by:
Reported by the vendor.
Changelog:
2007-01-18: Added CVE reference.
Original Advisory:
http://www.openbsd.org/errata.html#agp
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About this Secunia Advisory
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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7th Oct, 2008
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