Home / vulnerabilities Secunia Security Advisory 44248
Posted on 23 April 2011
Source : packetstormsecurity.org Link
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TITLE:
Linux Kernel Denial of Service and Privilege Escalation
Vulnerabilities
SECUNIA ADVISORY ID:
SA44248
VERIFY ADVISORY:
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http://secunia.com/advisories/44248/
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RELEASE DATE:
2011-04-23
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http://secunia.com/advisories/44248/
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DESCRIPTION:
Some vulnerabilities have been reported in the Linux Kernel, which
can be exploited by malicious, local users to cause a DoS (Denial of
Service) and potentially gain escalated privileges.
1) Integer overflow errors within the "agp_generic_insert_memory()"
and "agp_generic_remove_memory()" function in
drivers/char/agp/generic.c can be exploited to cause a buffer
overflow via e.g. specially crafted AGPIOC_BIND and AGPIOC_UNBIND
IOCTLs.
2) The implementation of the AGPIOC_RESERVE and AGPIOC_ALLOCATE
IOCTLs does not properly handle and track memory allocations, which
can be exploited to cause an OOM (Out Of Memory) situation.
Successful exploitation requires access to the "/dev/agpgart" device
(usually group "video").
SOLUTION:
Restrict access to trusted users only.
PROVIDED AND/OR DISCOVERED BY:
Vasiliy Kulikov
ORIGINAL ADVISORY:
https://lkml.org/lkml/2011/4/14/293
https://lkml.org/lkml/2011/4/14/294
OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/
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