Vulnerability Details : CVE-2021-3392
Potential exploit
A use-after-free flaw was found in the MegaRAID emulator of QEMU. This issue occurs while processing SCSI I/O requests in the case of an error mptsas_free_request() that does not dequeue the request object 'req' from a pending requests queue. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. Versions between 2.10.0 and 5.2.0 are potentially affected.
Vulnerability category: Memory CorruptionDenial of service
Products affected by CVE-2021-3392
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
- cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-3392
0.02%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 1 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-3392
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
2.1
|
LOW | AV:L/AC:L/Au:N/C:N/I:N/A:P |
3.9
|
2.9
|
NIST | |
|
3.2
|
LOW | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L |
1.5
|
1.4
|
NIST |
CWE ids for CVE-2021-3392
-
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.Assigned by:
- nvd@nist.gov (Primary)
- secalert@redhat.com (Secondary)
References for CVE-2021-3392
-
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
[SECURITY] [DLA 3099-1] qemu security updateMailing List;Third Party Advisory
-
https://security.netapp.com/advisory/ntap-20210507-0001/
March 2021 QEMU Vulnerabilities in NetApp Products | NetApp Product SecurityThird Party Advisory
-
https://lists.debian.org/debian-lts-announce/2021/04/msg00009.html
[SECURITY] [DLA 2623-1] qemu security updateThird Party Advisory
-
https://bugzilla.redhat.com/show_bug.cgi?id=1924042
1924042 – (CVE-2021-3392) CVE-2021-3392 QEMU: scsi: mptsas: use-after-free while processing io requestsIssue Tracking;Patch;Third Party Advisory
-
https://bugs.launchpad.net/qemu/+bug/1914236
Bug #1914236 “QEMU: scsi: use-after-free in mptsas_process_scsi_...” : Bugs : QEMUExploit;Third Party Advisory
Jump to