QEMU and KVM protocol_client_msg() denial of service
| qemu-kvm-protocolclientmsg-dos (47561) |  Low Risk |
Description:
QEMU and KVM (Kernel-based Virtual Machine) are vulnerable to a denial of service, caused by an infinite loop within the protocol_client_msg() function. By sending a specially-crafted message to the host, a remote attacker could exploit this vulnerability to cause the server to enter into an infinite loop resulting in a denial of service.
*CVSS:
| Base Score: | 5 |
| Access Vector: | Network |
| Access Complexity: | Low |
| Authentication: | None |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Partial |
| Temporal Score: | 3.7 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
Remedy:
For KVM:
Upgrade to the latest version of KVM (81 or later), available from the KVM Download Web page. See References.
For QEMU:
Refer to the QEMU SVN repository for patch, upgrade or suggested workaround information. See References.
References:
- CORE-2008-1210: Qemu and KVM VNC server remote DoS.
- KVM Download Web page: KVM.
- KVM Web page: Kernel Based Virtual Machine.
- QEMU SVN repository: QEMU.
- QEMU Web page: QEMU.
- BID-32910: QEMU and KVM VNC Server Remote Denial of Service Vulnerability
- CVE-2008-2382: The protocol_client_msg function in vnc.c in the VNC server in (1) Qemu 0.9.1 and earlier and (2) KVM kvm-79 and earlier allows remote attackers to cause a denial of service (infinite loop) via a certain message.
- MDVSA-2009:008: qemu
- MDVSA-2009:009: kvm
- MDVSA-2009:010: qemu
- SA33293: QEMU VNC "protocol_client_msg()" Denial of Service
- SA33303: KVM VNC "protocol_client_msg()" Denial of Service
- SA33350: Fedora update for kvm
- SECTRACK ID: 1021488: Qemu VNC Server Bug in protocol_client_msg() Lets Remote Users Deny Service
- SECTRACK ID: 1021489: KVM VNC Server Bug in protocol_client_msg() Lets Remote Users Deny Service
- SUSE-SR:2009:002: SUSE Security Summary Report
- SUSE-SR:2009:008: SUSE Security Summary Report
- USN-703-1: xterm vulnerabilities
- USN-776-1: KVM vulnerabilities
- USN-776-2: KVM regression
- VUPEN/ADV-2008-3488: QEMU VNC protocol_client_msg() Denial of Service Vulnerability
- VUPEN/ADV-2008-3489: KVM VNC protocol_client_msg() Denial of Service Vulnerability
Platforms Affected:
- Canonical Ubuntu 6.06 LTS
- Canonical Ubuntu 7.10
- Canonical Ubuntu 8.04 LTS
- Canonical Ubuntu 8.10
- Fabrice Bellard QEMU 0.6.1
- Fabrice Bellard QEMU 0.8.2
- Fabrice Bellard QEMU 0.9.0
- Fabrice Bellard QEMU 0.9.1
- KVM Qumranet KVM 36
- KVM Qumranet KVM 79
- KVM Qumranet KVM (Kernel-based Virtual Machine)
- MandrakeSoft Mandrake Linux 2008.0
- MandrakeSoft Mandrake Linux 2008.0 X86_64
- MandrakeSoft Mandrake Linux 2008.1 X86_64
- MandrakeSoft Mandrake Linux 2008.1
- Mandriva Linux 2009.0
- Mandriva Linux 2009.0 X86_64
Reported:
Dec 22, 2008
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.