{"id":"CVE-2019-5023","state":"PUBLISHED","title":"An exploitable vulnerability exists in the grsecurity PaX patch for the function read_kmem, in PaX from version pax-linux-4.9.8-test1 to 4.9.24-test7, grsecurity official from vers","description":"An exploitable vulnerability exists in the grsecurity PaX patch for the function read_kmem, in PaX from version pax-linux-4.9.8-test1 to 4.9.24-test7, grsecurity official from version grsecurity-3.1-4.9.8-201702060653 to grsecurity-3.1-4.9.24-201704252333, grsecurity unofficial from version v4.9.25-unofficialgrsec to v4.9.74-unofficialgrsec. PaX adds a temp buffer to the read_kmem function, which is never freed when an invalid address is supplied. This results in a memory leakage that can lead to a crash of the system. An attacker needs to induce a read to /dev/kmem using an invalid address to exploit this vulnerability.","publishedAt":"2019-10-31T20:15:40.000Z","updatedAt":"2024-08-04T19:40:48.969Z","severity":{"score":5.9,"label":"Medium","version":"3.0","vector":"CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H","source":"talos"},"assigner":"talos","products":["n/a PaX"],"affected":[{"vendor":"n/a","product":"PaX","versions":[{"version":"PaX pax-linux-4.9.24-test7.patch (latest version available to the public) grsecurity grsecurity-3.1-4.9.24-201704252333.patch (latest official version available to the public) v4.9.74-unofficial_grsec (latest unofficial version available to the public)","status":"affected"}]}],"references":["https://talosintelligence.com/vulnerability_reports/TALOS-2019-0784"],"weaknesses":["CWE-401"],"ingestedAt":"2026-10-29T19:46:04.126Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2019/5xxx/CVE-2019-5023.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2019-5023","state":"PUBLISHED","datePublished":"2019-10-31T20:15:40.000Z","dateUpdated":"2024-08-04T19:40:48.969Z","assignerShortName":"talos","assignerOrgId":"b86d76f8-0f8a-4a96-a78d-d8abfc7fc29b","dateReserved":"2019-01-04T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"An exploitable vulnerability exists in the grsecurity PaX patch for the function read_kmem, in PaX from version pax-linux-4.9.8-test1 to 4.9.24-test7, grsecurity official from version grsecurity-3.1-4.9.8-201702060653 to grsecurity-3.1-4.9.24-201704252333, grsecurity unofficial from version v4.9.25-unofficialgrsec to v4.9.74-unofficialgrsec. PaX adds a temp buffer to the read_kmem function, which is never freed when an invalid address is supplied. This results in a memory leakage that can lead to a crash of the system. An attacker needs to induce a read to /dev/kmem using an invalid address to exploit this vulnerability."}],"affected":[{"vendor":"n/a","product":"PaX","versions":[{"version":"PaX pax-linux-4.9.24-test7.patch (latest version available to the public) grsecurity grsecurity-3.1-4.9.24-201704252333.patch (latest official version available to the public) v4.9.74-unofficial_grsec (latest unofficial version available to the public)","status":"affected"}]}],"references":[{"url":"https://talosintelligence.com/vulnerability_reports/TALOS-2019-0784","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_0":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H","version":"3.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-401","description":"CWE-401: Improper Release of Memory Before Removing Last Reference","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"talos","dateUpdated":"2022-04-19T17:32:57.000Z","orgId":"b86d76f8-0f8a-4a96-a78d-d8abfc7fc29b"},"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"talos-cna@cisco.com","ID":"CVE-2019-5023","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"PaX","version":{"version_data":[{"version_value":"PaX pax-linux-4.9.24-test7.patch (latest version available to the public) grsecurity grsecurity-3.1-4.9.24-201704252333.patch (latest official version available to the public) v4.9.74-unofficial_grsec (latest unofficial version available to the public)"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"An exploitable vulnerability exists in the grsecurity PaX patch for the function read_kmem, in PaX from version pax-linux-4.9.8-test1 to 4.9.24-test7, grsecurity official from version grsecurity-3.1-4.9.8-201702060653 to grsecurity-3.1-4.9.24-201704252333, grsecurity unofficial from version v4.9.25-unofficialgrsec to v4.9.74-unofficialgrsec. PaX adds a temp buffer to the read_kmem function, which is never freed when an invalid address is supplied. This results in a memory leakage that can lead to a crash of the system. An attacker needs to induce a read to /dev/kmem using an invalid address to exploit this vulnerability."}]},"impact":{"cvss":{"baseScore":5.9,"baseSeverity":"Medium","vectorString":"CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H","version":"3.0"}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-401: Improper Release of Memory Before Removing Last Reference"}]}]},"references":{"reference_data":[{"name":"https://talosintelligence.com/vulnerability_reports/TALOS-2019-0784","refsource":"MISC","url":"https://talosintelligence.com/vulnerability_reports/TALOS-2019-0784"}]}}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://talosintelligence.com/vulnerability_reports/TALOS-2019-0784","tags":["x_refsource_MISC","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-04T19:40:48.969Z"}}]}}}