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.

CVSS v3 3.3 LOW
CVSS v2.0 2.1 LOW

3.3^/10

CVSS v3 : LOW

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

2.1^/10

CVSS v2.0 : LOW

Vector : AV:L/AC:L/Au:N/C:N/I:P/A:N

Exploitability : 3.9 / Impact : 2.9

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

References

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

Configurations

Configuration 1 (hide)

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

History

No history.

Information

Published : 2021-03-09 18:15

Updated : 2024-11-21 05:46

NVD link : CVE-2021-20263

Mitre link : CVE-2021-20263

CVE.ORG link : CVE-2021-20263

JSON object : View

Products Affected

qemu

qemu

CWE

CWE-281

Improper Preservation of Permissions

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