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Vulnerability CVE-2021-20263
Published: 2021-03-09
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. |
Type:
CWE-281 (Improper Preservation of Permissions)
CVSS2 => (AV:L/AC:L/Au:N/C:N/I:P/A:N)
CVSS Base Score |
Impact Subscore |
Exploitability Subscore |
2.1/10 |
2.9/10 |
3.9/10 |
Exploit range |
Attack complexity |
Authentication |
Local |
Low |
No required |
Confidentiality impact |
Integrity impact |
Availability impact |
None |
Partial |
None |
References: |
https://bugzilla.redhat.com/show_bug.cgi?id=1933668
https://www.openwall.com/lists/oss-security/2021/03/08/1
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