CVE-2021-4145

CVSS V2 Medium 4.9 CVSS V3 Medium 6.5
Description
A NULL pointer dereference issue was found in the block mirror layer of QEMU in versions prior to 6.2.0. The `self` pointer is dereferenced in mirror_wait_on_conflicts() without ensuring that it's not NULL. A malicious unprivileged user within the guest could use this flaw to crash the QEMU process on the host when writing data reaches the threshold of mirroring node.
Overview
  • CVE ID
  • CVE-2021-4145
  • Assigner
  • secalert@redhat.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2022-01-25T20:15:08
  • Last Modified Date
  • 2022-09-28T19:54:45
Weakness Enumerations
CWE URL
CWE-476 http://cwe.mitre.org/data/definitions/476.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:qemu:qemu:6.1.0:-:*:*:*:*:*:* 1 OR
cpe:2.3:a:qemu:qemu:6.1.0:rc0:*:*:*:*:*:* 1 OR
cpe:2.3:a:qemu:qemu:6.1.0:rc1:*:*:*:*:*:* 1 OR
cpe:2.3:a:qemu:qemu:6.1.0:rc2:*:*:*:*:*:* 1 OR
cpe:2.3:a:qemu:qemu:6.1.0:rc3:*:*:*:*:*:* 1 OR
cpe:2.3:a:qemu:qemu:6.1.0:rc4:*:*:*:*:*:* 1 OR
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:L/AC:L/Au:N/C:N/I:N/A:C
  • Access Vector
  • LOCAL
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • NONE
  • Availability Impact
  • COMPLETE
  • Base Score
  • 4.9
  • Severity
  • MEDIUM
  • Exploitability Score
  • 3.9
  • Impact Score
  • 6.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
  • Attack Vector
  • LOCAL
  • Attack Compatibility
  • LOW
  • Privileges Required
  • LOW
  • User Interaction
  • NONE
  • Scope
  • CHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • HIGH
  • Base Score
  • 6.5
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 2
  • Impact Score
  • 4
References
Reference URL Reference Tags
https://bugzilla.redhat.com/show_bug.cgi?id=2034602 Issue Tracking Patch Third Party Advisory
https://gitlab.com/qemu-project/qemu/-/commit/66fed30c9cd11854fc878a4eceb507e915d7c9cd Patch Third Party Advisory
https://security.gentoo.org/glsa/202208-27 Third Party Advisory
https://security.netapp.com/advisory/ntap-20220311-0004/ Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-4145
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4145
History
Created Old Value New Value Data Type Notes
2022-05-10 15:45:54 Added to TrackCVE
2022-12-06 07:41:16 2022-01-25T20:15Z 2022-01-25T20:15:08 CVE Published Date updated
2022-12-06 07:41:16 2022-09-28T19:54:45 CVE Modified Date updated
2022-12-06 07:41:17 Analyzed Vulnerability Status updated
2022-12-06 07:41:22 References updated