{"api_version":"1","generated_at":"2026-05-14T00:15:26+00:00","cve":"CVE-2024-9143","urls":{"html":"https://cve.report/CVE-2024-9143","api":"https://cve.report/api/cve/CVE-2024-9143.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2024-9143","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2024-9143"},"summary":{"title":"Low-level invalid GF(2^m) parameters lead to OOB memory access","description":"Issue summary: Use of the low-level GF(2^m) elliptic curve APIs with untrusted\nexplicit values for the field polynomial can lead to out-of-bounds memory reads\nor writes.\n\nImpact summary: Out of bound memory writes can lead to an application crash or\neven a possibility of a remote code execution, however, in all the protocols\ninvolving Elliptic Curve Cryptography that we're aware of, either only \"named\ncurves\" are supported, or, if explicit curve parameters are supported, they\nspecify an X9.62 encoding of binary (GF(2^m)) curves that can't represent\nproblematic input values. Thus the likelihood of existence of a vulnerable\napplication is low.\n\nIn particular, the X9.62 encoding is used for ECC keys in X.509 certificates,\nso problematic inputs cannot occur in the context of processing X.509\ncertificates.  Any problematic use-cases would have to be using an \"exotic\"\ncurve encoding.\n\nThe affected APIs include: EC_GROUP_new_curve_GF2m(), EC_GROUP_new_from_params(),\nand various supporting BN_GF2m_*() functions.\n\nApplications working with \"exotic\" explicit binary (GF(2^m)) curve parameters,\nthat make it possible to represent invalid field polynomials with a zero\nconstant term, via the above or similar APIs, may terminate abruptly as a\nresult of reading or writing outside of array bounds.  Remote code execution\ncannot easily be ruled out.\n\nThe FIPS modules in 3.3, 3.2, 3.1 and 3.0 are not affected by this issue.","state":"PUBLISHED","assigner":"openssl","published_at":"2024-10-16 17:15:18","updated_at":"2026-05-12 12:17:22"},"problem_types":["CWE-125","CWE-787","CWE-125 CWE-125 Out-of-bounds Read","CWE-787 CWE-787 Out-of-bounds 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Thus the likelihood of existence of a vulnerable<br>application is low.<br><br>In particular, the X9.62 encoding is used for ECC keys in X.509 certificates,<br>so problematic inputs cannot occur in the context of processing X.509<br>certificates.  Any problematic use-cases would have to be using an \"exotic\"<br>curve encoding.<br><br>The affected APIs include: EC_GROUP_new_curve_GF2m(), EC_GROUP_new_from_params(),<br>and various supporting BN_GF2m_*() functions.<br><br>Applications working with \"exotic\" explicit binary (GF(2^m)) curve parameters,<br>that make it possible to represent invalid field polynomials with a zero<br>constant term, via the above or similar APIs, may terminate abruptly as a<br>result of reading or writing outside of array bounds.  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Any problematic use-cases would have to be using an \"exotic\"\ncurve encoding.\n\nThe affected APIs include: EC_GROUP_new_curve_GF2m(), EC_GROUP_new_from_params(),\nand various supporting BN_GF2m_*() functions.\n\nApplications working with \"exotic\" explicit binary (GF(2^m)) curve parameters,\nthat make it possible to represent invalid field polynomials with a zero\nconstant term, via the above or similar APIs, may terminate abruptly as a\nresult of reading or writing outside of array bounds.  Remote code execution\ncannot easily be ruled out.\n\nThe FIPS modules in 3.3, 3.2, 3.1 and 3.0 are not affected by this issue."}],"metrics":[{"format":"other","other":{"content":{"text":"Low"},"type":"https://openssl-library.org/policies/general/security-policy/"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-125","description":"CWE-125 Out-of-bounds Read","lang":"en","type":"CWE"},{"cweId":"CWE-787","description":"CWE-787 Out-of-bounds Write","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2025-09-01T08:29:10.392Z","orgId":"3a12439a-ef3a-4c79-92e6-6081a721f1e5","shortName":"openssl"},"references":[{"name":"OpenSSL Advisory","tags":["vendor-advisory"],"url":"https://openssl-library.org/news/secadv/20241016.txt"},{"name":"3.3.3 git commit","tags":["patch"],"url":"https://github.com/openssl/openssl/commit/c0d3e4d32d2805f49bec30547f225bc4d092e1f4"},{"name":"3.2.4 git commit","tags":["patch"],"url":"https://github.com/openssl/openssl/commit/bc7e04d7c8d509fb78fc0e285aa948fb0da04700"},{"name":"3.1.8 git commit","tags":["patch"],"url":"https://github.com/openssl/openssl/commit/fdf6723362ca51bd883295efe206cb5b1cfa5154"},{"name":"3.0.16 git commit","tags":["patch"],"url":"https://github.com/openssl/openssl/commit/72ae83ad214d2eef262461365a1975707f862712"},{"name":"1.1.1zb git commit","tags":["patch"],"url":"https://github.openssl.org/openssl/extended-releases/commit/8efc0cbaa8ebba8e116f7b81a876a4123594d86a"},{"name":"1.0.2zl git commit","tags":["patch"],"url":"https://github.openssl.org/openssl/extended-releases/commit/9d576994cec2b7aa37a91740ea7e680810957e41"}],"source":{"discovery":"UNKNOWN"},"title":"Low-level invalid GF(2^m) parameters lead to OOB memory access","x_generator":{"engine":"Vulnogram 0.2.0"}}},"cveMetadata":{"assignerOrgId":"3a12439a-ef3a-4c79-92e6-6081a721f1e5","assignerShortName":"openssl","cveId":"CVE-2024-9143","datePublished":"2024-10-16T17:09:23.844Z","dateReserved":"2024-09-24T08:37:04.834Z","dateUpdated":"2026-05-12T11:43:47.107Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2024-10-16 17:15:18","lastModifiedDate":"2026-05-12 12:17:22","problem_types":["CWE-125","CWE-787","CWE-125 CWE-125 Out-of-bounds Read","CWE-787 CWE-787 Out-of-bounds Write"],"metrics":{"cvssMetricV31":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","baseScore":4.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":2.8,"impactScore":1.4}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2024","CveId":"9143","Ordinal":"1","Title":"Low-level invalid GF(2^m) parameters lead to OOB memory access","CVE":"CVE-2024-9143","Year":"2024"},"notes":[{"CveYear":"2024","CveId":"9143","Ordinal":"1","NoteData":"Issue summary: Use of the low-level GF(2^m) elliptic curve APIs with untrusted\nexplicit values for the field polynomial can lead to out-of-bounds memory reads\nor writes.\n\nImpact summary: Out of bound memory writes can lead to an application crash or\neven a possibility of a remote code execution, however, in all the protocols\ninvolving Elliptic Curve Cryptography that we're aware of, either only \"named\ncurves\" are supported, or, if explicit curve parameters are supported, they\nspecify an X9.62 encoding of binary (GF(2^m)) curves that can't represent\nproblematic input values. Thus the likelihood of existence of a vulnerable\napplication is low.\n\nIn particular, the X9.62 encoding is used for ECC keys in X.509 certificates,\nso problematic inputs cannot occur in the context of processing X.509\ncertificates.  Any problematic use-cases would have to be using an \"exotic\"\ncurve encoding.\n\nThe affected APIs include: EC_GROUP_new_curve_GF2m(), EC_GROUP_new_from_params(),\nand various supporting BN_GF2m_*() functions.\n\nApplications working with \"exotic\" explicit binary (GF(2^m)) curve parameters,\nthat make it possible to represent invalid field polynomials with a zero\nconstant term, via the above or similar APIs, may terminate abruptly as a\nresult of reading or writing outside of array bounds.  Remote code execution\ncannot easily be ruled out.\n\nThe FIPS modules in 3.3, 3.2, 3.1 and 3.0 are not affected by this issue.","Type":"Description","Title":"Low-level invalid GF(2^m) parameters lead to OOB memory access"}]}}}