CVE Vulnerability

CVE-2021-20263

A flaw was found in the virtio-fs shared file system daemon (virtiofsd) of QEMU. The new 'xattrmap' option may cause the 'security.capability' xattr in the guest to not drop on file write, potentially leading to a modified, privileged executable in the guest. In rare circumstances, this flaw could be used by a malicious user to elevate their privileges within the guest.

2.1 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

Scope

3.3 /10

CVSS v3.0 : LOW

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 1.4

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://www.openwall.com/lists/oss-security/2021/03/08/1 Mailing List Patch
https://bugzilla.redhat.com/show_bug.cgi?id=1933668 Issue Tracking Patch
https://security.netapp.com/advisory/ntap-20210507-0002/ Third Party Advisory
https://security.gentoo.org/glsa/202208-27 Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
Information

Published : 2021-03-09 06:15

Updated : 2022-09-30 01:29

NVD link : CVE-2021-20263

Mitre link : CVE-2021-20263

Products Affected
No products.
CWE
CWE-281

Improper Preservation of Permissions