CVE-2021-3975
libvirt: segmentation fault during VM shutdown can lead to vdsm hang
Severity Score
6.5
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
A use-after-free flaw was found in libvirt. The qemuMonitorUnregister() function in qemuProcessHandleMonitorEOF is called using multiple threads without being adequately protected by a monitor lock. This flaw could be triggered by the virConnectGetAllDomainStats API when the guest is shutting down. An unprivileged client with a read-only connection could use this flaw to perform a denial of service attack by causing the libvirt daemon to crash.
Se ha encontrado un fallo de uso de memoria previamente liberada en libvirt. La función qemuMonitorUnregister() en qemuProcessHandleMonitorEOF es llamada usando múltiples hilos sin estar adecuadamente protegida por un bloqueo de monitor. Este fallo podría ser activado por la API virConnectGetAllDomainStats cuando el huésped está siendo apagado. Un cliente no privilegiado con una conexión de sólo lectura podría usar este fallo para llevar a cabo un ataque de denegación de servicio causando el bloqueo del demonio libvirt.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2021-11-18 CVE Reserved
- 2022-05-03 CVE Published
- 2024-08-03 CVE Updated
- 2024-11-14 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-416: Use After Free
CAPEC
References (6)
| URL | Tag | Source |
|---|---|---|
| https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html | Mailing List |
|
| https://security.netapp.com/advisory/ntap-20221201-0002 | Third Party Advisory |
|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=2024326 | 2022-05-10 | |
| https://github.com/libvirt/libvirt/commit/1ac703a7d0789e46833f4013a3876c2e3af18ec7 | 2024-04-01 | |
| https://ubuntu.com/security/CVE-2021-3975 | 2024-04-01 |
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2021-3975 | 2022-05-10 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Redhat Search vendor "Redhat" | Codeready Linux Builder Search vendor "Redhat" for product "Codeready Linux Builder" | - | - |
Affected
| in | Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0" | - |
Safe
|
| Redhat Search vendor "Redhat" | Codeready Linux Builder Search vendor "Redhat" for product "Codeready Linux Builder" | - | - |
Affected
| in | Redhat Search vendor "Redhat" | Enterprise Linux Eus Search vendor "Redhat" for product "Enterprise Linux Eus" | 8.6 Search vendor "Redhat" for product "Enterprise Linux Eus" and version "8.6" | - |
Safe
|
| Redhat Search vendor "Redhat" | Codeready Linux Builder Search vendor "Redhat" for product "Codeready Linux Builder" | - | - |
Affected
| in | Redhat Search vendor "Redhat" | Enterprise Linux For Ibm Z Systems Search vendor "Redhat" for product "Enterprise Linux For Ibm Z Systems" | 8.0 Search vendor "Redhat" for product "Enterprise Linux For Ibm Z Systems" and version "8.0" | - |
Safe
|
| Redhat Search vendor "Redhat" | Codeready Linux Builder Search vendor "Redhat" for product "Codeready Linux Builder" | - | - |
Affected
| in | Redhat Search vendor "Redhat" | Enterprise Linux For Ibm Z Systems Eus Search vendor "Redhat" for product "Enterprise Linux For Ibm Z Systems Eus" | 8.6 Search vendor "Redhat" for product "Enterprise Linux For Ibm Z Systems Eus" and version "8.6" | - |
Safe
|
| Redhat Search vendor "Redhat" | Codeready Linux Builder Search vendor "Redhat" for product "Codeready Linux Builder" | - | - |
Affected
| in | Redhat Search vendor "Redhat" | Enterprise Linux For Power Little Endian Search vendor "Redhat" for product "Enterprise Linux For Power Little Endian" | 8.0 Search vendor "Redhat" for product "Enterprise Linux For Power Little Endian" and version "8.0" | - |
Safe
|
| Redhat Search vendor "Redhat" | Codeready Linux Builder Search vendor "Redhat" for product "Codeready Linux Builder" | - | - |
Affected
| in | Redhat Search vendor "Redhat" | Enterprise Linux For Power Little Endian Eus Search vendor "Redhat" for product "Enterprise Linux For Power Little Endian Eus" | 8.6 Search vendor "Redhat" for product "Enterprise Linux For Power Little Endian Eus" and version "8.6" | - |
Safe
|
| Redhat Search vendor "Redhat" | Libvirt Search vendor "Redhat" for product "Libvirt" | < 7.1.0 Search vendor "Redhat" for product "Libvirt" and version " < 7.1.0" | - |
Affected
| ||||||
| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | 21.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "21.10" | - |
Affected
| ||||||
| Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 35 Search vendor "Fedoraproject" for product "Fedora" and version "35" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Eus Search vendor "Redhat" for product "Enterprise Linux Eus" | 8.6 Search vendor "Redhat" for product "Enterprise Linux Eus" and version "8.6" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux For Ibm Z Systems Search vendor "Redhat" for product "Enterprise Linux For Ibm Z Systems" | 8.0 Search vendor "Redhat" for product "Enterprise Linux For Ibm Z Systems" and version "8.0" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux For Ibm Z Systems Eus Search vendor "Redhat" for product "Enterprise Linux For Ibm Z Systems Eus" | 8.6 Search vendor "Redhat" for product "Enterprise Linux For Ibm Z Systems Eus" and version "8.6" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux For Power Little Endian Search vendor "Redhat" for product "Enterprise Linux For Power Little Endian" | 8.0 Search vendor "Redhat" for product "Enterprise Linux For Power Little Endian" and version "8.0" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux For Power Little Endian Eus Search vendor "Redhat" for product "Enterprise Linux For Power Little Endian Eus" | 8.6 Search vendor "Redhat" for product "Enterprise Linux For Power Little Endian Eus" and version "8.6" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions Search vendor "Redhat" for product "Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions" | 8.6 Search vendor "Redhat" for product "Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions" and version "8.6" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server Tus Search vendor "Redhat" for product "Enterprise Linux Server Tus" | 8.6 Search vendor "Redhat" for product "Enterprise Linux Server Tus" and version "8.6" | - |
Affected
| ||||||
| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0" | - |
Affected
| ||||||
| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 11.0 Search vendor "Debian" for product "Debian Linux" and version "11.0" | - |
Affected
| ||||||
| Netapp Search vendor "Netapp" | Ontap Select Deploy Administration Utility Search vendor "Netapp" for product "Ontap Select Deploy Administration Utility" | - | - |
Affected
| ||||||