Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Qemu | Qemu | < 6.1.0 |
| Redhat | Enterprise Linux | 8.0 |
| Debian | Debian Linux | 9.0 |
Related Weaknesses (CWE)
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1989651Issue TrackingPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/09/msg00000.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.htmlMailing ListThird Party Advisory
- https://security.gentoo.org/glsa/202208-27Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210902-0006/Third Party Advisory
- https://www.debian.org/security/2021/dsa-4980Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1989651Issue TrackingPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/09/msg00000.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.htmlMailing ListThird Party Advisory
- https://security.gentoo.org/glsa/202208-27Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210902-0006/Third Party Advisory
- https://www.debian.org/security/2021/dsa-4980Third Party Advisory
FAQ
What is CVE-2021-3682?
CVE-2021-3682 is a vulnerability with a CVSS score of 8.5 (HIGH). 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...
How severe is CVE-2021-3682?
CVE-2021-3682 has been rated HIGH with a CVSS base score of 8.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-3682?
Check the references section above for vendor advisories and patch information. Affected products include: Qemu Qemu, Redhat Enterprise Linux, Debian Debian Linux.