QEMU image security bypass
| qemu-image-security-bypass (44269) |  Medium Risk |
Description:
QEMU could allow a local attacker to bypass security restrictions caused by an error when modifying removable media. By changing an image header to specify another format, a local attacker on a guest instance could exploit this vulnerability to read arbitrary files on the host.
*CVSS:
| Base Score: | 2.1 |
| Access Vector: | Local |
| Access Complexity: | Low |
| Authentication: | None |
| Confidentiality Impact: | Partial |
| Integrity Impact: | None |
| Availability Impact: | None |
| Temporal Score: | 1.6 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Bypass Security
Remedy:
Refer to the QEMU Web site for patch, upgrade or suggested workaround information. See References.
For other distributions:
Apply the appropriate update for your system. See References.
References:
- QEMU Web site: QEMU.
- BID-30604: QEMU Security Bypass Vulnerability
- CVE-2008-1945: QEMU 0.9.0 does not properly handle changes to removable media, which allows guest OS users to read arbitrary files on the host OS by using the diskformat: parameter in the -usbdevice option to modify the disk-image header to identify a different format, a related issue to CVE-2008-2004.
- DSA-1799: qemu -- several vulnerabilities
- MDVSA-2008:162: qemu
- RHSA-2008-0892: Important: xen security and bug fix update
- SA32063: Xen DomU HVM Disk Format Security Bypass
- SECTRACK ID: 1020959: Xen Qemu Removable Media Code Bug Discloses Host Hypervisor Files to Local Users
- SUSE-SR:2009:008: SUSE Security Summary Report
- USN-776-1: KVM vulnerabilities
- USN-776-2: KVM regression
Platforms Affected:
- Canonical Ubuntu 8.04 LTS
- Canonical Ubuntu 8.10
- Debian Debian Linux 4.0
- Debian Debian Linux 5.0
- Fabrice Bellard QEMU
- MandrakeSoft Mandrake Linux 2008.0 X86_64
- MandrakeSoft Mandrake Linux 2008.0
- MandrakeSoft Mandrake Linux 2008.1 X86_64
- MandrakeSoft Mandrake Linux 2008.1
- RedHat Enterprise Linux 5 Client
- RedHat Enterprise Linux 5
- RedHat RHEL Desktop Multi OS 5 Client
- RedHat RHEL Virtualization 5 Server
Reported:
Aug 07, 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.