CVE-2012-5375

Public Exploit

Description

The CRC32C feature in the Btrfs implementation in the Linux kernel before 3.8-rc1 allows local users to cause a denial of service (prevention of file creation) by leveraging the ability to write to a directory important to the victim, and creating a file with a crafted name that is associated with a specific CRC32C hash value.

Category

4.0
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 0.08%
Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.kernel.org/pub/linux/kernel/v3.x/testing/patch-3.8-rc1.bz2 patch
http://crypto.junod.info/2012/12/13/hash-dos-and-btrfs/
https://github.com/torvalds/linux/commit/9c52057c698fb96f8f07e7a4bcf4801a092bda89 patch exploit
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=9c52057c698fb96f8f07e7a4bcf4801a092bda89
http://www.ubuntu.com/usn/USN-1944-1 vendor advisory
http://www.ubuntu.com/usn/USN-1945-1 vendor advisory
http://www.ubuntu.com/usn/USN-2017-1 vendor advisory
http://www.ubuntu.com/usn/USN-1947-1 vendor advisory
http://openwall.com/lists/oss-security/2012/12/13/20 mailing list
http://www.ubuntu.com/usn/USN-1946-1 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2012-5375?
CVE-2012-5375 has been scored as a medium severity vulnerability.
How to fix CVE-2012-5375?
To fix CVE-2012-5375, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2012-5375 being actively exploited in the wild?
It is possible that CVE-2012-5375 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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