CVE-2013-1797: Use After Free
First published: Fri Mar 01 2013(Updated: )
Description of the problem: There is a potential use after free issue with the handling of MSR_KVM_SYSTEM_TIME. If the guest specifies a GPA in a movable or removable memory such as frame buffers then KVM might continue to write to that address even after it's removed via KVM_SET_USER_MEMORY_REGION. KVM pins the page in memory so it's unlikely to cause an issue, but if the user space component re-purposes the memory previously used for the guest, then the guest will be able to corrupt that memory. Acknowledgements: Red Hat would like to thank Andrew Honig of Google for reporting this issue.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | <=3.8.4 | |
| Linux Kernel | =3.8.0 | |
| Linux Kernel | =3.8.1 | |
| Linux Kernel | =3.8.2 | |
| Linux Kernel | =3.8.3 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.133-1 6.12.22-1 |
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Reference Links
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=0b79459b482e85cb7426aa7da683a9f2c97aeae1
- http://lists.opensuse.org/opensuse-security-announce/2013-05/msg00018.html
- http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.html
- http://lists.opensuse.org/opensuse-security-announce/2013-07/msg00018.html
- http://rhn.redhat.com/errata/RHSA-2013-0727.html
- http://rhn.redhat.com/errata/RHSA-2013-0744.html
- http://rhn.redhat.com/errata/RHSA-2013-0746.html
- http://rhn.redhat.com/errata/RHSA-2013-0928.html
- http://rhn.redhat.com/errata/RHSA-2013-1026.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2013:176
- http://www.openwall.com/lists/oss-security/2013/03/20/9
- http://www.ubuntu.com/usn/USN-1809-1
- http://www.ubuntu.com/usn/USN-1812-1
- http://www.ubuntu.com/usn/USN-1813-1
- https://bugzilla.redhat.com/show_bug.cgi?id=917013
- https://github.com/torvalds/linux/commit/0b79459b482e85cb7426aa7da683a9f2c97aeae1
- https://launchpad.net/bugs/cve/CVE-2013-1797
- https://git.kernel.org/cgit/virt/kvm/kvm.git/commit/?id=0b79459b482e85cb7426aa7da683a9f2c97aeae1
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=923967
- https://rhn.redhat.com/errata/RHSA-2013-0727.html
- https://rhn.redhat.com/errata/RHSA-2013-0744.html
- https://rhn.redhat.com/errata/RHSA-2013-0746.html
- https://rhn.redhat.com/errata/RHSA-2013-0928.html
- https://rhn.redhat.com/errata/RHSA-2013-1026.html
- https://www.openwall.com/lists/oss-security/2013/03/20/9
- https://security-tracker.debian.org/tracker/CVE-2013-1797
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-1797
- https://nvd.nist.gov/vuln/detail/CVE-2013-1797
- https://ubuntu.com/security/CVE-2013-1797
Frequently Asked Questions
What is the severity of CVE-2013-1797?
CVE-2013-1797 is classified as a high-severity vulnerability due to its potential for exploitation in KVM environments.
How do I fix CVE-2013-1797?
To fix CVE-2013-1797, update your Linux kernel to a version greater than 3.8.4 or apply the relevant patches.
Which versions of Linux Kernel are affected by CVE-2013-1797?
CVE-2013-1797 affects Linux kernel versions prior to 3.8.4, including 3.8.0, 3.8.1, 3.8.2, and 3.8.3.
Can CVE-2013-1797 be exploited remotely?
CVE-2013-1797 has the potential for exploitation in a virtualized environment, which may allow for remote attacks.
What systems are primarily impacted by CVE-2013-1797?
CVE-2013-1797 primarily impacts systems using KVM virtualization on affected Linux kernel versions.
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