CVE-2021-20181
HIGH severity · CVSS 7.5 · CWE-367
7.5CVSS HIGH
Summary
A race condition flaw was found in the 9pfs server implementation of QEMU up to and including 5.2.0. This flaw allows a malicious 9p client to cause a use-after-free error, potentially escalating their privileges on the system. The highest threat from this vulnerability is to confidentiality, integrity as well as system availability.
Impact & exploitability
Attack vectorLocal
Attack complexityHigh
Privileges requiredHigh
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:H/PR:H/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=1927007 ↗
Additional information
- NVD record
- https://bugzilla.redhat.com/show_bug.cgi?id=1927007Patch
- https://lists.debian.org/debian-lts-announce/2021/02/msg00024.htmlAdvisory
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.htmlAdvisory
- https://security.netapp.com/advisory/ntap-20210720-0009/Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-159/Advisory