PT-2020-6708 · Qemu+4 · Qemu+4
Alexander Bulekov
+1
·
Published
2020-12-17
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Updated
2022-08-31
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CVE-2020-35506
CVSS v2.0
6.8
Medium
| Vector | AV:L/AC:L/Au:S/C:C/I:C/A:C |
Name of the Vulnerable Software and Affected Versions
QEMU versions prior to 6.0.0
Description
The issue is related to a use-after-free vulnerability in the am53c974 SCSI host bus adapter emulation of QEMU. This vulnerability can be exploited to gain access to confidential data, compromise data integrity, and cause a denial of service. A privileged guest user can crash the QEMU process on the host, potentially leading to code execution with the privileges of the QEMU process. The vulnerability is triggered during the handling of the 'Information Transfer' command (CMD TI).
Recommendations
For versions prior to 6.0.0, update to version 6.0.0 or later to resolve the issue. As a temporary workaround, consider restricting access to the am53c974 SCSI host bus adapter emulation to minimize the risk of exploitation. Avoid using the 'Information Transfer' command (CMD TI) in the affected QEMU process until the issue is resolved.
Fix
DoS
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Astra Linux
Debian
Qemu
Suse