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libvirt Security Bypass and Denial of Service Vulnerabilities

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Release Date:  2011-03-10    Last Update:  2011-04-05    Views:  2,137

Secunia Advisory SA43670

Where:

From local network

Impact:

Security Bypass, DoS

Solution Status:

Vendor Patch

Software:

CVE Reference(s):

Description


A security issue and a vulnerability have been reported in libvirt, which can be exploited by malicious people to bypass certain security restrictions and cause a DoS (Denial of Service).

1) The libvirt "virNodeDeviceDettach()", "virNodeDeviceReset()", "virDomainRevertToSnapshot()", and "virDomainSnapshotDelete()" API calls are not properly enforcing read-only connections, which can be exploited to e.g. crash the host server.

2) The error reporting mechanism in libvirtd is not thread safe, which can be exploited to cause a crash by triggering errors in multiple threads at the same time.


Solution:
Update to version 0.9.0.

Provided and/or discovered by:
Red Hat

Original Advisory:
libvirt:
http://www.libvirt.org/news.html

Red Hat:
https://bugzilla.redhat.com/show_bug.cgi?id=683650
https://bugzilla.redhat.com/show_bug.cgi?id=693391

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: libvirt Security Bypass and Denial of Service Vulnerabilities

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