CVE-2021-20181

CVSS V2 Medium 6.9 CVSS V3 High 7.5
Description
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.
Overview
  • CVE ID
  • CVE-2021-20181
  • Assigner
  • secalert@redhat.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-05-13T16:15:07
  • Last Modified Date
  • 2022-09-30T15:18:46
Weakness Enumerations
CWE URL
CWE-362 http://cwe.mitre.org/data/definitions/362.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* 1 OR 5.2.0
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:L/AC:M/Au:N/C:C/I:C/A:C
  • Access Vector
  • LOCAL
  • Access Compatibility
  • MEDIUM
  • Authentication
  • NONE
  • Confidentiality Impact
  • COMPLETE
  • Integrity Impact
  • COMPLETE
  • Availability Impact
  • COMPLETE
  • Base Score
  • 6.9
  • Severity
  • MEDIUM
  • Exploitability Score
  • 3.4
  • Impact Score
  • 10
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
  • Attack Vector
  • LOCAL
  • Attack Compatibility
  • HIGH
  • Privileges Required
  • HIGH
  • User Interaction
  • NONE
  • Scope
  • CHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • HIGH
  • Base Score
  • 7.5
  • Base Severity
  • HIGH
  • Exploitability Score
  • 0.8
  • Impact Score
  • 6
References
Reference URL Reference Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1927007 Issue Tracking Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/02/msg00024.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html Mailing List Third Party Advisory
https://security.netapp.com/advisory/ntap-20210720-0009/ Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-159/ Third Party Advisory VDB Entry
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-20181
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20181
History
Created Old Value New Value Data Type Notes
2022-05-10 06:26:19 Added to TrackCVE
2022-12-05 02:13:45 2021-05-13T16:15Z 2021-05-13T16:15:07 CVE Published Date updated
2022-12-05 02:13:45 2022-09-30T15:18:46 CVE Modified Date updated
2022-12-05 02:13:45 Analyzed Vulnerability Status updated
2022-12-05 02:13:50 References updated