CVE-2010-4529

Integer underflow in the irda_getsockopt function in net/irda/af_irda.c in the Linux kernel before 2.6.37 on platforms other than x86 allows local users to obtain potentially sensitive information from kernel heap memory via an IRLMP_ENUMDEVICES getsockopt call.

Weakness

The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.

Affected Software

References

• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=fdac1e0697356ac212259f2147aa60c72e334861
• http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00002.html
• http://openwall.com/lists/oss-security/2010/12/23/1
• http://openwall.com/lists/oss-security/2011/01/03/1
• http://secunia.com/advisories/42684
• http://secunia.com/advisories/43291
• http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.37
• http://www.securityfocus.com/bid/45556
• http://www.spinics.net/lists/netdev/msg150842.html
• http://www.vupen.com/english/advisories/2011/0375