CVE-2021-20263
Summary
| CVE | CVE-2021-20263 |
|---|---|
| State | PUBLIC |
| Assigner | [email protected] |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2021-03-09 18:15:00 UTC |
| Updated | 2022-09-30 13:29:00 UTC |
| 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. |
Risk And Classification
Problem Types: CWE-281
NVD Known Affected Configurations (CPE 2.3)
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| April 2021 QEMU Vulnerabilities in NetApp Products | NetApp Product Security | CONFIRM | security.netapp.com | |
| QEMU: Multiple Vulnerabilities (GLSA 202208-27) — Gentoo security | GENTOO | security.gentoo.org | |
| 1933668 – (CVE-2021-20263) CVE-2021-20263 QEMU: virtiofsd: 'security.capabilities' is not dropped with xattrmap option | MISC | bugzilla.redhat.com | Issue Tracking, Patch, Third Party Advisory |
| oss-security - CVE-2021-20263 QEMU: virtiofsd: 'security.capabilities' is not dropped with xattrmap option | MISC | www.openwall.com | Mailing List, Patch, Third Party Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Legacy QID Mappings
- 180595 Debian Security Update for qemu (CVE-2021-20263)
- 710604 Gentoo Linux QEMU Multiple Vulnerabilities (GLSA 202208-27)
- 750149 SUSE Enterprise Linux Security Update for qemu (SUSE-SU-2021:1942-1)
- 750771 OpenSUSE Security Update for qemu (openSUSE-SU-2021:1942-1)
- 900063 CBL-Mariner Linux Security Update for qemu-kvm 4.2.0