REDHAT-BUG-646725: Medium severity red hat linux vulnerability
Description of problem: Calling ETHTOOLGRXCLSRLALL with a large rulecnt will allocate kernel heap without clearing it. For the one driver (niu) that implements it, it will leave the unused portion of heap unchanged and copy the full contents back to userspace.
This is different from CVE-2010-2478, but was introduced at the same time (0853ad66, 2.6.27-rc1).
Upstream commit: http://git.kernel.org/linus/ae6df5f96a51818d6376da5307d773baeece4014
Acknowledgements:
Red Hat would like to thank Kees Cook for reporting this issue.
Affected Software
Event History
Frequently Asked Questions
What is the severity of REDHAT-BUG-646725?
The severity of REDHAT-BUG-646725 is considered high due to potential exposure of sensitive information.
How do I fix REDHAT-BUG-646725?
To fix REDHAT-BUG-646725, you should update the affected Linux kernel to the latest version that addresses this vulnerability.
Which versions of Red Hat Linux are affected by REDHAT-BUG-646725?
Red Hat Linux kernel versions from 2.6.27-rc1 and later are affected by REDHAT-BUG-646725.
What type of vulnerability is REDHAT-BUG-646725?
REDHAT-BUG-646725 is a heap memory allocation vulnerability that can lead to information disclosure.
Is there a workaround for REDHAT-BUG-646725?
Currently, the recommended action is to apply the available kernel updates since there are no effective workarounds to mitigate REDHAT-BUG-646725.