CVE-2021-3682
HIGH severity · CVSS 8.5 · CWE-763
8.5CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityHigh
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)3%
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://bugzilla.redhat.com/show_bug.cgi?id=1989651 ↗
Additional information
- NVD record
- https://bugzilla.redhat.com/show_bug.cgi?id=1989651Patch
- https://lists.debian.org/debian-lts-announce/2021/09/msg00000.htmlAdvisory
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.htmlAdvisory
- https://security.gentoo.org/glsa/202208-27Advisory
- https://security.netapp.com/advisory/ntap-20210902-0006/Advisory
- https://www.debian.org/security/2021/dsa-4980Advisory