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.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2013-4154 from the MITRE CVE dictionary dictionary and NIST NVD.
Not vulnerable. This issue did not affect the versions of libvirt as shipped with Red Hat Enterprise Linux 5 and Red Hat Enterprise Linux 6.
NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.
| Base Score | 3.3 |
|---|---|
| Base Metrics | AV:A/AC:L/Au:N/C:N/I:N/A:P |
| Access Vector | Adjacent Network |
| Access Complexity | Low |
| Authentication | None |
| Confidentiality Impact | None |
| Integrity Impact | None |
| Availability Impact | Partial |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 6 | libvirt | Not affected |
| Red Hat Enterprise Linux 5 | libvirt | Not affected |
Vulmon