CVE-2019-13115

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{}

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A remote attacker who compromises a SSH server may be able to disclose sensitive information or cause a denial of service condition on the client system when a user connects to the server. This is related to an _libssh2_check_length mistake, and is different from the various issues fixed in 1.8.1, such as CVE-2019-3855."}, {"lang": "es", "value": "En libssh2 anterior a la versi\u00f3n 1.9.0, el archivo kex_method_diffie_hellman_group_exchange_sha256_key_exchange en kex.c presenta un desbordamiento de enteros que podr\u00eda conllevar a una escritura fuera de l\u00edmites en la manera en que se leen los paquetes desde el servidor. Un atacante remoto que comprometa un servidor SSH puede ejecutar c\u00f3digo en el sistema cliente cuando un usuario se conecta al servidor. Esto esta relacionado con un error de _libssh2_check_length y es diferente de los diversos problemas corregidos en la versi\u00f3n 1.8.1, tal y como el CVE-2019-3855."}], "id": "CVE-2019-13115", "lastModified": "2026-06-17T02:16:05.543", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.8, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 4.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": true}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2019-07-16T18:15:13.287", "references": [{"source": "cve@mitre.org", "url": "http://packetstormsecurity.com/files/172834/libssh2-1.8.2-Out-Of-Bounds-Read.html"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": "https://blog.semmle.com/libssh2-integer-overflow/"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://github.com/libssh2/libssh2/compare/02ecf17...42d37aa"}, {"source": "cve@mitre.org", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://github.com/libssh2/libssh2/pull/350"}, {"source": "cve@mitre.org", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://libssh2.org/changes.html"}, {"source": 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{"bugzilla": {"description": "libssh2: integer overflow in kex_method_diffie_hellman_group_exchange_sha256_key_exchange in kex.c leads to out-of-bounds write", "id": "1731324", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1731324"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.8", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H", "status": "draft"}, "cwe": "CWE-190->CWE-787", "details": ["In libssh2 before 1.9.0, kex_method_diffie_hellman_group_exchange_sha256_key_exchange in kex.c has an integer overflow that could lead to an out-of-bounds read in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to disclose sensitive information or cause a denial of service condition on the client system when a user connects to the server. This is related to an _libssh2_check_length mistake, and is different from the various issues fixed in 1.8.1, such as CVE-2019-3855."], "name": "CVE-2019-13115", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "libssh2", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Will not fix", "package_name": "libssh2", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "virt:rhel/libssh2", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/a:redhat:advanced_virtualization:8::el8", "fix_state": "Will not fix", "package_name": "virt:8.0.0/libssh2", "product_name": "Red Hat Enterprise Linux 8 Advanced Virtualization"}], "public_date": "2019-07-16T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2019-13115\nhttps://nvd.nist.gov/vuln/detail/CVE-2019-13115\nhttps://blog.semmle.com/libssh2-integer-overflow/"], "threat_severity": "Moderate"}

{}