CVE-2010-0435: Null Pointer Dereference
First published: Thu Mar 04 2010(Updated: )
Gleb Napatov found a bug in KVM that can be used to crash the host on Intel machines. If emulator is tricked into emulating mov to/from DR instruction it causes NULL pointer dereference on VMX since kvm_x86_ops->(set|get)_dr are not initialized. Recently this is not exploitable from guest userspace, but malicious guest kernel can trigger it easily.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/linux-2.6 | ||
| debian/user-mode-linux | ||
| Red Hat Enterprise Virtualization | =2.2 | |
| Red Hat KVM | =83 |
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Reference Links
- https://rhn.redhat.com/errata/RHSA-2010-0627.html
- https://rhn.redhat.com/errata/RHSA-2010-0622.html
- https://bugzilla.redhat.com/show_bug.cgi?id=570528
- http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00000.html
- http://secunia.com/advisories/42778
- http://www.vupen.com/english/advisories/2011/0012
- https://launchpad.net/bugs/cve/CVE-2010-0435
- https://security-tracker.debian.org/tracker/CVE-2010-0435
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-0435
- https://nvd.nist.gov/vuln/detail/CVE-2010-0435
- https://ubuntu.com/security/CVE-2010-0435
Frequently Asked Questions
What is the severity of CVE-2010-0435?
CVE-2010-0435 has a high severity rating as it can lead to crashes on Intel host machines.
How do I fix CVE-2010-0435?
To fix CVE-2010-0435, users should update their KVM and Linux packages to the latest versions provided by their distribution.
Which versions are affected by CVE-2010-0435?
CVE-2010-0435 affects certain versions of Linux kernel and KVM, specifically those prior to the patches that address this vulnerability.
Can CVE-2010-0435 be exploited from a guest user space?
No, CVE-2010-0435 is not currently exploitable from guest user space according to recent assessments.
Who discovered the CVE-2010-0435 vulnerability?
The bug associated with CVE-2010-0435 was discovered by Gleb Napatov.
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