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{"lang": "es", "value": "La implementaci\u00f3n sigalgs en t1_lib.c en OpenSSL 1.0.2 anterior a 1.0.2a permite a atacantes remotos causar una denegaci\u00f3n de servicio (referencia a puntero nulo y ca\u00edda del demonio) mediante el uso de una extensi\u00f3n signature_algorithms inv\u00e1lida en el mensaje ClientHello durante una renegociaci\u00f3n."}], "evaluatorComment": "<a href=\"http://cwe.mitre.org/data/definitions/476.html\" rel=\"nofollow\">CWE-476: NULL Pointer Dereference</a>", "id": "CVE-2015-0291", "lastModified": "2025-04-12T10:46:40.837", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, 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{"acknowledgement": "Red Hat would like to thank OpenSSL project for reporting this issue. Upstream acknowledges David Ramos (Stanford University) as the original reporter.", "bugzilla": {"description": "openssl: ClientHello sigalgs NULL pointer dereference DoS", "id": "1202338", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1202338"}, "csaw": false, "cvss": {"cvss_base_score": "5.0", "cvss_scoring_vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "status": "draft"}, "cwe": "CWE-476", "details": ["The sigalgs implementation in t1_lib.c in OpenSSL 1.0.2 before 1.0.2a allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) by using an invalid signature_algorithms extension in the ClientHello message during a renegotiation."], "name": "CVE-2015-0291", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:4", "fix_state": "Not affected", "package_name": "openssl", "product_name": "Red Hat Enterprise Linux 4"}, {"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "openssl", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "openssl097a", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "openssl", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "openssl098e", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "openssl", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "openssl098e", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/a:redhat:enterprise_linux:7::hypervisor", "fix_state": "Not affected", "package_name": "mingw-virt-viewer", "product_name": "Red Hat Enterprise Virtualization 3"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:6", "fix_state": "Not affected", "package_name": "openssl", "product_name": "Red Hat JBoss Enterprise Application Platform 6"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_web_server:1", "fix_state": "Not affected", "package_name": "openssl", "product_name": "Red Hat JBoss Enterprise Web Server 1"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_web_server:2", "fix_state": "Not affected", "package_name": "openssl", "product_name": "Red Hat JBoss Enterprise Web Server 2"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_web_server:3", "fix_state": "Not affected", "package_name": "openssl", "product_name": "Red Hat JBoss Enterprise Web Server 3"}, {"cpe": "cpe:/a:redhat:storage:2.1", "fix_state": "Not affected", "package_name": "openssl", "product_name": "Red Hat Storage 2.1"}], "public_date": "2015-03-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2015-0291\nhttps://nvd.nist.gov/vuln/detail/CVE-2015-0291\nhttps://access.redhat.com/articles/1384453\nhttps://openssl.org/news/secadv_20150319.txt"], "statement": "This issue did not affect the versions of openssl as shipped with Red Hat Enterprise Linux 5, 6, and 7.", "threat_severity": "Important"}