CVE-2010-4343

drivers/scsi/bfa/bfa_core.c in the Linux kernel before 2.6.35 does not initialize a certain port data structure, which allows local users to cause a denial of service (system crash) via read operations on an fc_host statistics file.

Weakness

The product does not initialize or incorrectly initializes a resource, which might leave the resource in an unexpected state when it is accessed or used.

Affected Software

Potential Mitigations

• Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
• For example, in Java, if the programmer does not explicitly initialize a variable, then the code could produce a compile-time error (if the variable is local) or automatically initialize the variable to the default value for the variable’s type. In Perl, if explicit initialization is not performed, then a default value of undef is assigned, which is interpreted as 0, false, or an equivalent value depending on the context in which the variable is accessed.

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/26.html
• https://cwe.mitre.org/data/definitions/29.html

References

• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=7873ca4e4401f0ecd8868bf1543113467e6bae61
• http://secunia.com/advisories/42884
• http://secunia.com/advisories/46397
• http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.35
• http://www.openwall.com/lists/oss-security/2010/12/08/3
• http://www.openwall.com/lists/oss-security/2010/12/09/15
• http://www.redhat.com/support/errata/RHSA-2011-0017.html
• http://www.securityfocus.com/archive/1/520102/100/0/threaded
• http://www.securityfocus.com/bid/45262
• http://www.spinics.net/lists/linux-scsi/msg43772.html
• http://www.vmware.com/security/advisories/VMSA-2011-0012.html
• https://bugzilla.redhat.com/show_bug.cgi?id=661182