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TITLE:
Linux Kernel "irda_getsockopt()" Integer Underflow Weakness

SECUNIA ADVISORY ID:
SA42684

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/42684/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=42684

RELEASE DATE:
2010-12-24

DISCUSS ADVISORY:
http://secunia.com/advisories/42684/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
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http://secunia.com/advisories/42684/

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https://ca.secunia.com/?page=viewadvisory&vuln_id=42684

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DESCRIPTION:
Dan Rosenberg has reported a weakness in the Linux Kernel, which can
be exploited by malicious, local users to disclose system
information.

The weakness is caused due to an integer underflow within the
"irda_getsockopt()" function in net/irda/af_irda.c and can be
exploited to e.g. disclose kernel memory via a specially crafted
"IRLMP_ENUMDEVICES" getsockopt.

SOLUTION:
Restrict access to trusted users only.

PROVIDED AND/OR DISCOVERED BY:
Dan Rosenberg

ORIGINAL ADVISORY:
http://www.spinics.net/lists/netdev/msg150842.html

OTHER REFERENCES:
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http://secunia.com/products/corporate/EVM/

DEEP LINKS:
Further details available in Customer Area:
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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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