CVE-2012-0207: Divide by Zero
First published: Tue Jan 10 2012(Updated: )
Commit 5b7c84066733c5dfb0e4016d939757b38de189e4 ('ipv4: correct IGMP behavior on v3 query during v2-compatibility mode') added yet another case for query parsing, which can result in max_delay = 0. Substitute a value of 1, as in the usual v3 case. <a href="http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=654876">http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=654876</a> code added in 2.6.36-rc8. Upstream commit: <a href="http://git.kernel.org/linus/a8c1f65c79cbbb2f7da782d4c9d15639a9b94b27">http://git.kernel.org/linus/a8c1f65c79cbbb2f7da782d4c9d15639a9b94b27</a> Acknowledgements: Red Hat would like to thank Simon McVittie for reporting this issue.
Credit: security@debian.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/linux-2.6 | ||
| Linux Kernel | <3.0.17 | |
| Linux Kernel | >=3.1<3.1.9 | |
| Linux Kernel | >=3.2<3.2.1 | |
| Red Hat Enterprise Linux Server EUS | =5.6 |
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Reference Links
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=654876
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a8c1f65c79cbbb2f7da782d4c9d15639a9b94b27
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.1
- http://www.openwall.com/lists/oss-security/2012/01/10/5
- https://bugzilla.redhat.com/show_bug.cgi?id=772867
- https://github.com/torvalds/linux/commit/25c413ad0029ea86008234be28aee33456e53e5b
- https://github.com/torvalds/linux/commit/a8c1f65c79cbbb2f7da782d4c9d15639a9b94b27
- https://launchpad.net/bugs/cve/CVE-2012-0207
- http://git.kernel.org/linus/a8c1f65c79cbbb2f7da782d4c9d15639a9b94b27
- http://womble.decadent.org.uk/blog/igmp-denial-of-service-in-linux-cve-2012-0207.html
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=782684
- https://rhn.redhat.com/errata/RHSA-2012-0107.html
- https://rhn.redhat.com/errata/RHSA-2012-0168.html
- https://rhn.redhat.com/errata/RHSA-2012-0333.html
- https://rhn.redhat.com/errata/RHSA-2012-0350.html
- https://rhn.redhat.com/errata/RHSA-2012-0422.html
- https://security-tracker.debian.org/tracker/CVE-2012-0207
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a8c1f65c79cbbb2f7da782d4c9d15639a9b94b27
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0207
- https://nvd.nist.gov/vuln/detail/CVE-2012-0207
- https://ubuntu.com/security/CVE-2012-0207
Frequently Asked Questions
What is the severity of CVE-2012-0207?
CVE-2012-0207 has a medium severity level classified due to potential impacts on networking functionality.
How do I fix CVE-2012-0207?
To fix CVE-2012-0207, update to a version of the Linux kernel that is patched for this vulnerability.
What systems are affected by CVE-2012-0207?
CVE-2012-0207 affects certain versions of the Linux kernel and Red Hat Enterprise Linux EUS 5.6.
What are the implications of CVE-2012-0207?
The implications of CVE-2012-0207 involve potential disruption in Internet Group Management Protocol (IGMP) query handling.
Is there a public exploit available for CVE-2012-0207?
As of now, there have been no public exploits reported for CVE-2012-0207.
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