CVE-2021-20263

 

Published at: - 09-03-2021 07:15

Last modified: - 15-08-2022 01:15

Total changes: - 5

Description

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

 

Verification logic

 

Reference

• https://www.openwall.com/lists/oss-security/2021/03/08/1
• https://bugzilla.redhat.com/show_bug.cgi?id=1933668
• https://security.netapp.com/advisory/ntap-20210507-0002/
• GLSA-202208-27-

 

Keywords

NVD

 

CVE-2021-20263

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures