Ubuntu.comUB:CVE-2020-25637CVE-2020-25637
7.2 High
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
6.7 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
0.0004 Low
EPSS
Percentile
14.2%
A double free memory issue was found to occur in the libvirt API, in
versions before 6.8.0, responsible for requesting information about network
interfaces of a running QEMU domain. This flaw affects the polkit access
control driver. Specifically, clients connecting to the read-write socket
with limited ACL permissions could use this flaw to crash the libvirt
daemon, resulting in a denial of service, or potentially escalate their
privileges on the system. The highest threat from this vulnerability is to
data confidentiality and integrity as well as system availability.
Bugs
Notes
| Author | Note |
|---|---|
| mdeslaur | Read-only clients can’t exploit this flaw. Clients connecting to the read-write socket can exploit this to crash libvirt or possibly execute code, but on Ubuntu, access to the read-write socket already grants root-equivalent permissions, so this flaw has limited impact. Setting priority to negligible. |
Related
7.2 High
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
6.7 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
0.0004 Low
EPSS
Percentile
14.2%