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Vulnerability CVE-2021-3682
Published: 2021-08-05
Description: |
A flaw was found in the USB redirector device emulation of QEMU in versions prior to 6.1.0-rc2. It occurs when dropping packets during a bulk transfer from a SPICE client due to the packet queue being full. A malicious SPICE client could use this flaw to make QEMU call free() with faked heap chunk metadata, resulting in a crash of QEMU or potential code execution with the privileges of the QEMU process on the host. |
Type:
CWE-763
CVSS2 => (AV:N/AC:L/Au:S/C:P/I:P/A:P)
CVSS Base Score |
Impact Subscore |
Exploitability Subscore |
6.5/10 |
6.4/10 |
8/10 |
Exploit range |
Attack complexity |
Authentication |
Remote |
Low |
Single time |
Confidentiality impact |
Integrity impact |
Availability impact |
Partial |
Partial |
Partial |
References: |
https://bugzilla.redhat.com/show_bug.cgi?id=1989651
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