CVE-2016-10012

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*", "matchCriteriaId": "B5D52975-3CB0-4BF7-975F-66EF9BF42A06", "versionEndIncluding": "7.3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The shared memory manager (associated with pre-authentication compression) in sshd in OpenSSH before 7.4 does not ensure that a bounds check is enforced by all compilers, which might allows local users to gain privileges by leveraging access to a sandboxed privilege-separation process, related to the m_zback and m_zlib data structures."}, {"lang": "es", "value": "El administrador de memoria compartida (asociado con la compresi\u00f3n de pre-autenticaci\u00f3n) en sshd en OpenSSH en versiones anteriores a 7.4 no asegura que una verificaci\u00f3n de l\u00edmites sea ejecutada por todos los compiladores, lo que podr\u00eda permitir a usuarios locales obtener privilegios aprovechando el acceso a un proceso separado de privilegios aislado, relacionado con las estructuras de datos m_zback y m_zlib."}], "id": "CVE-2016-10012", "lastModified": "2026-06-17T00:38:53.997", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 7.2, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", 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"af854a3a-2127-422b-91ae-364da2661108", "url": "https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03818en_us"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.openssh.com/txt/release-7.4"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-119"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"affected_release": [{"advisory": "RHSA-2017:2029", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "openssh-0:7.4p1-11.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2017-08-01T00:00:00Z"}], "bugzilla": {"description": "openssh: Bounds check can be evaded in the shared memory manager used by pre-authentication compression support", "id": "1406293", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1406293"}, "csaw": false, "cvss": {"cvss_base_score": "3.6", "cvss_scoring_vector": "AV:N/AC:H/Au:S/C:P/I:P/A:N", "status": "verified"}, "cvss3": {"cvss3_base_score": "4.2", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N", "status": "verified"}, "cwe": "CWE-287", "details": ["The shared memory manager (associated with pre-authentication compression) in sshd in OpenSSH before 7.4 does not ensure that a bounds check is enforced by all compilers, which might allows local users to gain privileges by leveraging access to a sandboxed privilege-separation process, related to the m_zback and m_zlib data structures.", "It was found that the boundary checks in the code implementing support for pre-authentication compression could have been optimized out by certain compilers. An attacker able to compromise the privilege-separated process could possibly use this flaw for further attacks against the privileged monitor process."], "name": "CVE-2016-10012", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:4", "fix_state": "Will not fix", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 4"}, {"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Will not fix", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Fix deferred", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 6"}], "public_date": "2016-12-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2016-10012\nhttps://nvd.nist.gov/vuln/detail/CVE-2016-10012\nhttps://www.openssh.com/txt/release-7.4"], "statement": "In order to exploit this flaw, the attacker needs to first compromise the sandboxed privilege-separation process by using another security flaw. Because of this restriction for successful exploitation, this issue has been rated as having Low security impact.", "threat_severity": "Low"}

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