It was found that the QEMU's websocket frame decoder processed incoming frames without limiting resources used to process the header and the payload. An attacker able to access a guest's VNC console could use this flaw to trigger a denial of service on the host by exhausting all available memory and CPU.
Find out more about CVE-2015-1779 from the MITRE CVE dictionary dictionary and NIST NVD.
This issue did not affect the kvm and qemu-kvm packages as shipped with Red Hat Enterprise Linux 5 and 6.
| Base Score | 5.7 |
|---|---|
| Base Metrics | AV:A/AC:M/Au:N/C:N/I:N/A:C |
| Access Vector | Adjacent Network |
| Access Complexity | Medium |
| Authentication | None |
| Confidentiality Impact | None |
| Integrity Impact | None |
| Availability Impact | Complete |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Enterprise Linux 7 (qemu-kvm) | RHSA-2015:1943 | 2015-10-27 |
| Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts (qemu-kvm-rhev) | RHSA-2015:1931 | 2015-10-26 |
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7 | qemu-kvm-rhev | Will not fix |
| Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) | qemu-kvm-rhev | Will not fix |
| Red Hat Enterprise Linux OpenStack Platform 4.0 | qemu-kvm-rhev | Not affected |
| Red Hat Enterprise Linux 6 | qemu-kvm | Not affected |
| Red Hat Enterprise Linux 5 | kvm | Not affected |
Vulmon