{"id":"CVE-2021-20263","state":"PUBLISHED","title":"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 fil","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.","publishedAt":"2021-03-09T17:17:43.000Z","updatedAt":"2024-08-03T17:37:23.570Z","severity":null,"assigner":"redhat","products":["n/a QEMU"],"affected":[{"vendor":"n/a","product":"QEMU","versions":[{"version":"qemu 5.2.50","status":"affected"}]}],"references":["https://bugzilla.redhat.com/show_bug.cgi?id=1933668","https://www.openwall.com/lists/oss-security/2021/03/08/1","https://security.netapp.com/advisory/ntap-20210507-0002/","https://security.gentoo.org/glsa/202208-27"],"weaknesses":["CWE-281"],"ingestedAt":"2026-10-29T19:47:55.610Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/20xxx/CVE-2021-20263.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-20263","state":"PUBLISHED","datePublished":"2021-03-09T17:17:43.000Z","dateUpdated":"2024-08-03T17:37:23.570Z","assignerShortName":"redhat","assignerOrgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","dateReserved":"2020-12-17T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"n/a","product":"QEMU","versions":[{"version":"qemu 5.2.50","status":"affected"}]}],"references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1933668","tags":["x_refsource_MISC"]},{"url":"https://www.openwall.com/lists/oss-security/2021/03/08/1","tags":["x_refsource_MISC"]},{"url":"https://security.netapp.com/advisory/ntap-20210507-0002/","tags":["x_refsource_CONFIRM"]},{"url":"https://security.gentoo.org/glsa/202208-27","name":"GLSA-202208-27","tags":["vendor-advisory","x_refsource_GENTOO"]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-281","description":"CWE-281","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"redhat","dateUpdated":"2022-08-14T18:13:11.000Z","orgId":"53f830b8-0a3f-465b-8143-3b8a9948e749"},"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"secalert@redhat.com","ID":"CVE-2021-20263","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"QEMU","version":{"version_data":[{"version_value":"qemu 5.2.50"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"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."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-281"}]}]},"references":{"reference_data":[{"name":"https://bugzilla.redhat.com/show_bug.cgi?id=1933668","refsource":"MISC","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1933668"},{"name":"https://www.openwall.com/lists/oss-security/2021/03/08/1","refsource":"MISC","url":"https://www.openwall.com/lists/oss-security/2021/03/08/1"},{"name":"https://security.netapp.com/advisory/ntap-20210507-0002/","refsource":"CONFIRM","url":"https://security.netapp.com/advisory/ntap-20210507-0002/"},{"name":"GLSA-202208-27","refsource":"GENTOO","url":"https://security.gentoo.org/glsa/202208-27"}]}}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1933668","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://www.openwall.com/lists/oss-security/2021/03/08/1","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://security.netapp.com/advisory/ntap-20210507-0002/","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"https://security.gentoo.org/glsa/202208-27","name":"GLSA-202208-27","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-03T17:37:23.570Z"}}]}}}