CVE-2021-4145
QEMU Block Mirror NULL Pointer Dereference Vulnerability
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.
INFO
Published Date :
Jan. 25, 2022, 8:15 p.m.
Last Modified :
Sept. 28, 2022, 7:54 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
4.0
Exploitability Score :
2.0
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-4145.
| URL | Resource |
|---|---|
| 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 |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-4145 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-4145 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Sep. 28, 2022
Action Type Old Value New Value Changed Reference Type https://security.gentoo.org/glsa/202208-27 No Types Assigned https://security.gentoo.org/glsa/202208-27 Third Party Advisory -
CVE Modified by [email protected]
Aug. 15, 2022
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/202208-27 [No Types Assigned] -
Modified Analysis by [email protected]
Mar. 15, 2022
Action Type Old Value New Value Changed Reference Type https://security.netapp.com/advisory/ntap-20220311-0004/ No Types Assigned https://security.netapp.com/advisory/ntap-20220311-0004/ Third Party Advisory Changed CPE Configuration OR *cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* versions up to (excluding) 6.2.0 *cpe:2.3:a:qemu:qemu:6.2.0:rc0:*:*:*:*:*:* *cpe:2.3:a:qemu:qemu:6.2.0:rc1:*:*:*:*:*:* *cpe:2.3:a:qemu:qemu:6.2.0:rc2:*:*:*:*:*:* *cpe:2.3:a:qemu:qemu:6.2.0:rc3:*:*:*:*:*:* *cpe:2.3:a:qemu:qemu:6.2.0:rc4:*:*:*:*:*:* OR *cpe:2.3:a:qemu:qemu:6.1.0:-:*:*:*:*:*:* *cpe:2.3:a:qemu:qemu:6.1.0:rc0:*:*:*:*:*:* *cpe:2.3:a:qemu:qemu:6.1.0:rc1:*:*:*:*:*:* *cpe:2.3:a:qemu:qemu:6.1.0:rc2:*:*:*:*:*:* *cpe:2.3:a:qemu:qemu:6.1.0:rc3:*:*:*:*:*:* *cpe:2.3:a:qemu:qemu:6.1.0:rc4:*:*:*:*:*:* -
CVE Modified by [email protected]
Mar. 11, 2022
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20220311-0004/ [No Types Assigned] -
Initial Analysis by [email protected]
Feb. 01, 2022
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:N/I:N/A:C) Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=2034602 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=2034602 Issue Tracking, Patch, Third Party Advisory Changed Reference Type https://gitlab.com/qemu-project/qemu/-/commit/66fed30c9cd11854fc878a4eceb507e915d7c9cd No Types Assigned https://gitlab.com/qemu-project/qemu/-/commit/66fed30c9cd11854fc878a4eceb507e915d7c9cd Patch, Third Party Advisory Added CWE NIST CWE-476 Added CPE Configuration OR *cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* versions up to (excluding) 6.2.0 *cpe:2.3:a:qemu:qemu:6.2.0:rc0:*:*:*:*:*:* *cpe:2.3:a:qemu:qemu:6.2.0:rc1:*:*:*:*:*:* *cpe:2.3:a:qemu:qemu:6.2.0:rc2:*:*:*:*:*:* *cpe:2.3:a:qemu:qemu:6.2.0:rc3:*:*:*:*:*:* *cpe:2.3:a:qemu:qemu:6.2.0:rc4:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:-:*:*:* -
CVE Modified by [email protected]
Jan. 31, 2022
Action Type Old Value New Value Added Reference https://gitlab.com/qemu-project/qemu/-/commit/66fed30c9cd11854fc878a4eceb507e915d7c9cd [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-4145 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-4145
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.04 }} 0.00%
score
0.05635
percentile