2 lines
5.8 KiB
JSON
2 lines
5.8 KiB
JSON
{"affected":[{"affectedData":[{"product":"Linux kernel","vendor":"Ubuntu","versions":[{"lessThan":"5.8.0-50.56","status":"affected","version":"5.8 kernel","versionType":"custom"},{"lessThan":"5.4.0-72.80","status":"affected","version":"5.4 kernel","versionType":"custom"}]}],"source":"security@ubuntu.com"}],"configurations":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:canonical:ubuntu_linux:*:*:*:*:lts:*:*:*","matchCriteriaId":"90A80DE7-3EFA-464C-9D31-C46521FFBFBF","versionEndExcluding":"18.04","vulnerable":true},{"criteria":"cpe:2.3:o:canonical:ubuntu_linux:*:*:*:*:lts:*:*:*","matchCriteriaId":"2027773B-26DA-408E-B71D-40D05690D9EA","versionEndExcluding":"20.04","versionStartIncluding":"18.04.1","vulnerable":true}],"negate":false,"operator":"OR"}]},{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:canonical:ubuntu_linux:*:*:*:*:-:*:*:*","matchCriteriaId":"ACAB2EE0-EC21-4669-840F-94F6C3028C64","versionEndExcluding":"20.10","vulnerable":true}],"negate":false,"operator":"OR"}]}],"cveTags":[],"descriptions":[{"lang":"en","value":"Shiftfs, an out-of-tree stacking file system included in Ubuntu Linux kernels, did not properly handle faults occurring during copy_from_user() correctly. These could lead to either a double-free situation or memory not being freed at all. An attacker could use this to cause a denial of service (kernel memory exhaustion) or gain privileges via executing arbitrary code. AKA ZDI-CAN-13562."},{"lang":"es","value":"Shiftfs, un sistema de archivos de apilamiento fuera del árbol incluido en los kernels de Ubuntu Linux, no manejaba apropiadamente los fallos que ocurrían durante la función copy_from_user(). Esto podría conllevar a una situación de doble liberación o a que la memoria no sea liberada del todo. Un atacante podría usar esto para causar una denegación de servicio (agotamiento de la memoria del kernel) u alcanzar privilegios por medio de la ejecución de código arbitrario. También se conoce como ZDI-CAN-13562"}],"id":"CVE-2021-3492","lastModified":"2026-06-17T04:05:12.033","metrics":{"cvssMetricV2":[{"acInsufInfo":false,"baseSeverity":"HIGH","cvssData":{"accessComplexity":"LOW","accessVector":"LOCAL","authentication":"NONE","availabilityImpact":"COMPLETE","baseScore":7.2,"confidentialityImpact":"COMPLETE","integrityImpact":"COMPLETE","vectorString":"AV:L/AC:L/Au:N/C:C/I:C/A:C","version":"2.0"},"exploitabilityScore":3.9,"impactScore":10.0,"obtainAllPrivilege":false,"obtainOtherPrivilege":false,"obtainUserPrivilege":false,"source":"nvd@nist.gov","type":"Primary","userInteractionRequired":false}],"cvssMetricV31":[{"cvssData":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"exploitabilityScore":2.0,"impactScore":6.0,"source":"security@ubuntu.com","type":"Secondary"},{"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":"2021-04-17T05:15:13.113","references":[{"source":"security@ubuntu.com","tags":["Third Party Advisory","VDB Entry"],"url":"http://packetstormsecurity.com/files/162614/Kernel-Live-Patch-Security-Notice-LSN-0077-1.html"},{"source":"security@ubuntu.com","tags":["Mailing List","Patch","Vendor Advisory"],"url":"https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/commit/?id=25c891a949bf918b59cbc6e4932015ba4c35c333"},{"source":"security@ubuntu.com","tags":["Mailing List","Patch","Vendor Advisory"],"url":"https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/commit/?id=8fee52ab9da87d82bc6de9ebb3480fff9b4d53e6"},{"source":"security@ubuntu.com","tags":["Vendor Advisory"],"url":"https://ubuntu.com/security/notices/USN-4917-1"},{"source":"security@ubuntu.com","tags":["Mailing List","Third Party Advisory"],"url":"https://www.openwall.com/lists/oss-security/2021/04/16/2"},{"source":"security@ubuntu.com","tags":["Third Party Advisory","VDB Entry"],"url":"https://www.zerodayinitiative.com/advisories/ZDI-21-422/"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory","VDB Entry"],"url":"http://packetstormsecurity.com/files/162614/Kernel-Live-Patch-Security-Notice-LSN-0077-1.html"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mailing List","Patch","Vendor Advisory"],"url":"https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/commit/?id=25c891a949bf918b59cbc6e4932015ba4c35c333"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mailing List","Patch","Vendor Advisory"],"url":"https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/commit/?id=8fee52ab9da87d82bc6de9ebb3480fff9b4d53e6"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"],"url":"https://ubuntu.com/security/notices/USN-4917-1"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mailing List","Third Party Advisory"],"url":"https://www.openwall.com/lists/oss-security/2021/04/16/2"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory","VDB Entry"],"url":"https://www.zerodayinitiative.com/advisories/ZDI-21-422/"}],"sourceIdentifier":"security@ubuntu.com","vulnStatus":"Modified","weaknesses":[{"description":[{"lang":"en","value":"CWE-401"},{"lang":"en","value":"CWE-415"}],"source":"security@ubuntu.com","type":"Secondary"},{"description":[{"lang":"en","value":"CWE-401"},{"lang":"en","value":"CWE-415"}],"source":"nvd@nist.gov","type":"Primary"}]}
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