CVE-2013-4154

Severity: medium (CVSS 4.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2013-09-30 · updated 2026-06-16

Description

The qemuAgentCommand function in libvirt before 1.1.1, when a guest agent is not configured, allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via vectors related to "agent based cpu (un)plug," as demonstrated by the "virsh vcpucount foobar --guest" command.

Affected products

libvirt: through 1.1.0; 1.0.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.0.5 (+1)

References

http://libvirt.org/git/?p=libvirt.git%3Ba=commitdiff%3Bh=96518d4316b711c72205117f8d5c967d5127bbb6
http://libvirt.org/news.html
http://openwall.com/lists/oss-security/2013/07/19/12
https://bugzilla.redhat.com/show_bug.cgi?id=984821
https://bugzilla.redhat.com/show_bug.cgi?id=986386
http://libvirt.org/git/?p=libvirt.git%3Ba=commitdiff%3Bh=96518d4316b711c72205117f8d5c967d5127bbb6
http://libvirt.org/news.html
http://openwall.com/lists/oss-security/2013/07/19/12
https://bugzilla.redhat.com/show_bug.cgi?id=984821
https://bugzilla.redhat.com/show_bug.cgi?id=986386

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