CVE-2021-20181

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Summary

CVECVE-2021-20181
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-05-13 16:15:00 UTC
Updated2023-11-07 03:28:00 UTC
DescriptionA 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.

Risk And Classification

Problem Types: CWE-362

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Debian Debian Linux 10.0 All All All
Operating System Debian Debian Linux 9.0 All All All
Application Qemu Qemu All All All All

References

ReferenceSourceLinkTags
1927007 – (CVE-2021-20181) CVE-2021-20181 qemu: 9pfs: TOCTOU privilege escalation vulnerability MISC bugzilla.redhat.com
[SECURITY] [DLA 3099-1] qemu security update MLIST lists.debian.org
[SECURITY] [DLA 2560-1] qemu security update MLIST lists.debian.org
ZDI-21-159 | Zero Day Initiative MISC www.zerodayinitiative.com
CVE-2021-20181 QEMU Vulnerability in NetApp Products | NetApp Product Security CONFIRM security.netapp.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 174921 SUSE Enterprise Linux Security Update for qemu (SUSE-SU-2021:1245-1)
  • 174922 SUSE Enterprise Linux Security Update for qemu (SUSE-SU-2021:1240-1)
  • 174923 SUSE Enterprise Linux Security Update for qemu (SUSE-SU-2021:1241-1)
  • 174924 SUSE Enterprise Linux Security Update for qemu (SUSE-SU-2021:1244-1)
  • 174926 SUSE Enterprise Linux Security Update for qemu (SUSE-SU-2021:1242-1)
  • 179892 Debian Security Update for qemu (CVE-2021-20181)
  • 180995 Debian Security Update for qemu (DLA 3099-1)
  • 502354 Alpine Linux Security Update for qemu
  • 671198 EulerOS Security Update for qemu (EulerOS-SA-2022-1034)
  • 671203 EulerOS Security Update for qemu (EulerOS-SA-2022-1014)
  • 750338 OpenSUSE Security Update for qemu (openSUSE-SU-2021:0363-1)
  • 900156 CBL-Mariner Linux Security Update for qemu-kvm 4.2.0
  • 902810 Common Base Linux Mariner (CBL-Mariner) Security Update for qemu-kvm (4271)
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