{ "containers": { "cna": { "affected": [ { "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" } ] } ], "credits": [ { "lang": "en", "value": "Vincent Dehors of Synactiv Digital Security" } ], "datePublic": "2021-04-15T00:00:00", "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." } ], "metrics": [ { "cvssV3_1": { "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" } } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-415", "description": "CWE-415: Double Free", "lang": "en", "type": "CWE" } ] }, { "descriptions": [ { "cweId": "CWE-401", "description": "CWE-401: Missing Release of Memory after Effective Lifetime", "lang": "en", "type": "CWE" } ] } ], "providerMetadata": { "dateUpdated": "2021-05-18T17:06:14", "orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc", "shortName": "canonical" }, "references": [ { "tags": [ "x_refsource_MISC" ], "url": "https://www.openwall.com/lists/oss-security/2021/04/16/2" }, { "tags": [ "x_refsource_MISC" ], "url": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/commit/?id=8fee52ab9da87d82bc6de9ebb3480fff9b4d53e6" }, { "tags": [ "x_refsource_MISC" ], "url": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/commit/?id=25c891a949bf918b59cbc6e4932015ba4c35c333" }, { "tags": [ "x_refsource_MISC" ], "url": "https://ubuntu.com/security/notices/USN-4917-1" }, { "tags": [ "x_refsource_MISC" ], "url": "https://www.zerodayinitiative.com/advisories/ZDI-21-422/" }, { "tags": [ "x_refsource_MISC" ], "url": "http://packetstormsecurity.com/files/162614/Kernel-Live-Patch-Security-Notice-LSN-0077-1.html" } ], "source": { "discovery": "EXTERNAL" }, "title": "Ubuntu linux kernel shiftfs file system double free vulnerability", "x_generator": { "engine": "Vulnogram 0.0.9" }, "x_legacyV4Record": { "CVE_data_meta": { "ASSIGNER": "security@ubuntu.com", "DATE_PUBLIC": "2021-04-15T00:00:00.000Z", "ID": "CVE-2021-3492", "STATE": "PUBLIC", "TITLE": "Ubuntu linux kernel shiftfs file system double free vulnerability" }, "affects": { "vendor": { "vendor_data": [ { "product": { "product_data": [ { "product_name": "Linux kernel", "version": { "version_data": [ { "version_affected": "<", "version_name": "5.8 kernel", "version_value": "5.8.0-50.56" }, { "version_affected": "<", "version_name": "5.4 kernel", "version_value": "5.4.0-72.80" } ] } } ] }, "vendor_name": "Ubuntu" } ] } }, "credit": [ { "lang": "eng", "value": "Vincent Dehors of Synactiv Digital Security" } ], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": { "description_data": [ { "lang": "eng", "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." } ] }, "generator": { "engine": "Vulnogram 0.0.9" }, "impact": { "cvss": { "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" } }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "CWE-415: Double Free" } ] }, { "description": [ { "lang": "eng", "value": "CWE-401: Missing Release of Memory after Effective Lifetime" } ] } ] }, "references": { "reference_data": [ { "name": "https://www.openwall.com/lists/oss-security/2021/04/16/2", "refsource": "MISC", "url": "https://www.openwall.com/lists/oss-security/2021/04/16/2" }, { "name": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/commit/?id=8fee52ab9da87d82bc6de9ebb3480fff9b4d53e6", "refsource": "MISC", "url": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/commit/?id=8fee52ab9da87d82bc6de9ebb3480fff9b4d53e6" }, { "name": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/commit/?id=25c891a949bf918b59cbc6e4932015ba4c35c333", "refsource": "MISC", "url": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/commit/?id=25c891a949bf918b59cbc6e4932015ba4c35c333" }, { "name": "https://ubuntu.com/security/notices/USN-4917-1", "refsource": "MISC", "url": "https://ubuntu.com/security/notices/USN-4917-1" }, { "name": "https://www.zerodayinitiative.com/advisories/ZDI-21-422/", "refsource": "MISC", "url": "https://www.zerodayinitiative.com/advisories/ZDI-21-422/" }, { "name": "http://packetstormsecurity.com/files/162614/Kernel-Live-Patch-Security-Notice-LSN-0077-1.html", "refsource": "MISC", "url": "http://packetstormsecurity.com/files/162614/Kernel-Live-Patch-Security-Notice-LSN-0077-1.html" } ] }, "source": { "discovery": "EXTERNAL" } } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T16:53:17.692Z" }, "title": "CVE Program Container", "references": [ { "tags": [ "x_refsource_MISC", "x_transferred" ], "url": "https://www.openwall.com/lists/oss-security/2021/04/16/2" }, { "tags": [ "x_refsource_MISC", "x_transferred" ], "url": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/commit/?id=8fee52ab9da87d82bc6de9ebb3480fff9b4d53e6" }, { "tags": [ "x_refsource_MISC", "x_transferred" ], "url": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/commit/?id=25c891a949bf918b59cbc6e4932015ba4c35c333" }, { "tags": [ "x_refsource_MISC", "x_transferred" ], "url": "https://ubuntu.com/security/notices/USN-4917-1" }, { "tags": [ "x_refsource_MISC", "x_transferred" ], "url": "https://www.zerodayinitiative.com/advisories/ZDI-21-422/" }, { "tags": [ "x_refsource_MISC", "x_transferred" ], "url": "http://packetstormsecurity.com/files/162614/Kernel-Live-Patch-Security-Notice-LSN-0077-1.html" } ] } ] }, "cveMetadata": { "assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc", "assignerShortName": "canonical", "cveId": "CVE-2021-3492", "datePublished": "2021-04-17T04:20:16.011472Z", "dateReserved": "2021-04-09T00:00:00", "dateUpdated": "2024-09-17T03:54:52.527Z", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.1" }