Ubuntu.comUB:CVE-2021-3975CVE-2021-3975
6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:S/C:N/I:N/A:P
0.001 Low
EPSS
Percentile
50.2%
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.
Bugs
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 18.04 | noarch | libvirt | < 4.0.0-1ubuntu8.21 | UNKNOWN |
| ubuntu | 20.04 | noarch | libvirt | < 6.0.0-0ubuntu8.16 | UNKNOWN |
| ubuntu | 22.04 | noarch | libvirt | < 7.6.0-0ubuntu3 | UNKNOWN |
| ubuntu | 22.10 | noarch | libvirt | < 7.6.0-0ubuntu3 | UNKNOWN |
| ubuntu | 23.04 | noarch | libvirt | < 7.6.0-0ubuntu3 | UNKNOWN |
| ubuntu | 23.10 | noarch | libvirt | < 7.6.0-0ubuntu3 | UNKNOWN |
| ubuntu | 14.04 | noarch | libvirt | < any | UNKNOWN |
| ubuntu | 16.04 | noarch | libvirt | < any | UNKNOWN |
Related
6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:S/C:N/I:N/A:P
0.001 Low
EPSS
Percentile
50.2%