2 lines
4.2 KiB
JSON
2 lines
4.2 KiB
JSON
{"affected":[{"affectedData":[{"product":"kernel","vendor":"n/a","versions":[{"status":"affected","version":"kernel 5.2 and higher."}]}],"source":"secalert@redhat.com"}],"configurations":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","matchCriteriaId":"52C57624-28DE-4E03-B6EF-F09CC640D9F0","versionStartExcluding":"5.2","vulnerable":true}],"negate":false,"operator":"OR"}]},{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:redhat:openshift_container_platform:4.4:*:*:*:*:*:*:*","matchCriteriaId":"44C5E433-229C-4BB9-8481-8A74AFA8DB8E","vulnerable":true},{"criteria":"cpe:2.3:a:redhat:openshift_container_platform:4.5:*:*:*:*:*:*:*","matchCriteriaId":"D432C063-0805-4151-A819-508FE8954101","vulnerable":true},{"criteria":"cpe:2.3:a:redhat:openshift_container_platform:4.6:*:*:*:*:*:*:*","matchCriteriaId":"6B62E762-2878-455A-93C9-A5DB430D7BB5","vulnerable":true},{"criteria":"cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*","matchCriteriaId":"F4CFF558-3C47-480D-A2F0-BABF26042943","vulnerable":true}],"negate":false,"operator":"OR"}]}],"cveTags":[],"descriptions":[{"lang":"en","value":"There is a vulnerability in the linux kernel versions higher than 5.2 (if kernel compiled with config params CONFIG_BPF_SYSCALL=y , CONFIG_BPF=y , CONFIG_CGROUPS=y , CONFIG_CGROUP_BPF=y , CONFIG_HARDENED_USERCOPY not set, and BPF hook to getsockopt is registered). As result of BPF execution, the local user can trigger bug in __cgroup_bpf_run_filter_getsockopt() function that can lead to heap overflow (because of non-hardened usercopy). The impact of attack could be deny of service or possibly privileges escalation."},{"lang":"es","value":"Se presenta una vulnerabilidad en el kernel de Linux versiones superiores a 5.2 (si el kernel compilado con los parámetros config CONFIG_BPF_SYSCALL=y , CONFIG_BPF=y , CONFIG_CGROUPS=y , CONFIG_CGROUP_BPF=y , CONFIG_HARDENED_USERCOPY no se establece y el hook BPF a getsockopt está registrado). Como resultado de la ejecución de BPF, el usuario local puede desencadenar un error en la función __cgroup_bpf_run_filter_getsockopt() que puede conllevar a un desbordamiento de la pila (debido a una copia de usuario no reforzada). El impacto del ataque podría ser la denegación de servicio o posiblemente una escalada de privilegios"}],"id":"CVE-2021-20194","lastModified":"2026-06-17T03:33:27.007","metrics":{"cvssMetricV2":[{"acInsufInfo":false,"baseSeverity":"MEDIUM","cvssData":{"accessComplexity":"LOW","accessVector":"LOCAL","authentication":"NONE","availabilityImpact":"PARTIAL","baseScore":4.6,"confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","vectorString":"AV:L/AC:L/Au:N/C:P/I:P/A:P","version":"2.0"},"exploitabilityScore":3.9,"impactScore":6.4,"obtainAllPrivilege":false,"obtainOtherPrivilege":false,"obtainUserPrivilege":false,"source":"nvd@nist.gov","type":"Primary","userInteractionRequired":false}],"cvssMetricV31":[{"cvssData":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"exploitabilityScore":1.8,"impactScore":5.9,"source":"nvd@nist.gov","type":"Primary"}]},"published":"2021-02-23T23:15:13.100","references":[{"source":"secalert@redhat.com","tags":["Issue Tracking","Patch","Third Party Advisory"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1912683"},{"source":"secalert@redhat.com","tags":["Third Party Advisory"],"url":"https://security.netapp.com/advisory/ntap-20210326-0003/"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Issue Tracking","Patch","Third Party Advisory"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1912683"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"],"url":"https://security.netapp.com/advisory/ntap-20210326-0003/"}],"sourceIdentifier":"secalert@redhat.com","vulnStatus":"Modified","weaknesses":[{"description":[{"lang":"en","value":"CWE-20"}],"source":"secalert@redhat.com","type":"Secondary"},{"description":[{"lang":"en","value":"CWE-787"}],"source":"nvd@nist.gov","type":"Secondary"}]}
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