fkie_cve-2016-0787
Vulnerability from fkie_nvd
Published
2016-04-13 17:59
Modified
2025-04-12 10:46
Severity ?
Summary
The diffie_hellman_sha256 function in kex.c in libssh2 before 1.7.0 improperly truncates secrets to 128 or 256 bits, which makes it easier for man-in-the-middle attackers to decrypt or intercept SSH sessions via unspecified vectors, aka a "bits/bytes confusion bug."
References
Impacted products
Vendor | Product | Version | |
---|---|---|---|
fedoraproject | fedora | 22 | |
fedoraproject | fedora | 23 | |
opensuse | opensuse | 13.2 | |
libssh2 | libssh2 | * | |
debian | debian_linux | 7.0 | |
debian | debian_linux | 8.0 |
{ "configurations": [ { "nodes": [ { "cpeMatch": [ { "criteria": "cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:*", "matchCriteriaId": "253C303A-E577-4488-93E6-68A8DD942C38", "vulnerable": true }, { "criteria": "cpe:2.3:o:fedoraproject:fedora:23:*:*:*:*:*:*:*", "matchCriteriaId": "E79AB8DD-C907-4038-A931-1A5A4CFB6A5B", "vulnerable": true } ], "negate": false, "operator": "OR" } ] }, { "nodes": [ { "cpeMatch": [ { "criteria": "cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*", "matchCriteriaId": "03117DF1-3BEC-4B8D-AD63-DBBDB2126081", "vulnerable": true } ], "negate": false, "operator": "OR" } ] }, { "nodes": [ { "cpeMatch": [ { "criteria": "cpe:2.3:a:libssh2:libssh2:*:*:*:*:*:*:*:*", "matchCriteriaId": "D67987A0-3291-477D-B62B-31DFB7BC3E92", "versionEndIncluding": "1.6.0", "vulnerable": true } ], "negate": false, "operator": "OR" } ] }, { "nodes": [ { "cpeMatch": [ { "criteria": "cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*", "matchCriteriaId": "16F59A04-14CF-49E2-9973-645477EA09DA", "vulnerable": true }, { "criteria": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*", "matchCriteriaId": "C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43", "vulnerable": true } ], "negate": false, "operator": "OR" } ] } ], "cveTags": [], "descriptions": [ { "lang": "en", "value": "The diffie_hellman_sha256 function in kex.c in libssh2 before 1.7.0 improperly truncates secrets to 128 or 256 bits, which makes it easier for man-in-the-middle attackers to decrypt or intercept SSH sessions via unspecified vectors, aka a \"bits/bytes confusion bug.\"" }, { "lang": "es", "value": "La funci\u00f3n diffie_hellman_sha256 en kex.c en libssh2 en versiones anteriores a 1.7.0 trunca de manera incorrecta secretos a 128 o 256 bits, lo que hace m\u00e1s f\u00e1cil para atacantes man-in-the-middle descifrar o interceptar sesiones SSH a trav\u00e9s de vectores no especificados, tambi\u00e9n conocido como \"bits/bytes confusion bug\"." } ], "id": "CVE-2016-0787", "lastModified": "2025-04-12T10:46:40.837", "metrics": { "cvssMetricV2": [ { "acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": { "accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 4.3, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N", "version": "2.0" }, "exploitabilityScore": 8.6, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false } ], "cvssMetricV30": [ { "cvssData": { "attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.0" }, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary" } ] }, "published": "2016-04-13T17:59:10.930", "references": [ { "source": "secalert@redhat.com", "url": "http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177980.html" }, { "source": "secalert@redhat.com", "url": "http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178573.html" }, { "source": "secalert@redhat.com", "url": "http://lists.opensuse.org/opensuse-updates/2016-03/msg00008.html" }, { "source": "secalert@redhat.com", "url": "http://www.debian.org/security/2016/dsa-3487" }, { "source": "secalert@redhat.com", "url": "http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html" }, { "source": "secalert@redhat.com", "url": "http://www.securityfocus.com/bid/82514" }, { "source": "secalert@redhat.com", "url": "https://bto.bluecoat.com/security-advisory/sa120" }, { "source": "secalert@redhat.com", "url": "https://kc.mcafee.com/corporate/index?page=content\u0026id=SB10156" }, { "source": "secalert@redhat.com", "url": "https://puppet.com/security/cve/CVE-2016-0787" }, { "source": "secalert@redhat.com", "tags": [ "Third Party Advisory" ], "url": "https://security.gentoo.org/glsa/201606-12" }, { "source": "secalert@redhat.com", "tags": [ "Patch" ], "url": "https://www.libssh2.org/CVE-2016-0787.patch" }, { "source": "secalert@redhat.com", "tags": [ "Vendor Advisory" ], "url": "https://www.libssh2.org/adv_20160223.html" }, { "source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177980.html" }, { "source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178573.html" }, { "source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://lists.opensuse.org/opensuse-updates/2016-03/msg00008.html" }, { "source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.debian.org/security/2016/dsa-3487" }, { "source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html" }, { "source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.securityfocus.com/bid/82514" }, { "source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://bto.bluecoat.com/security-advisory/sa120" }, { "source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://kc.mcafee.com/corporate/index?page=content\u0026id=SB10156" }, { "source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://puppet.com/security/cve/CVE-2016-0787" }, { "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": [ "Third Party Advisory" ], "url": "https://security.gentoo.org/glsa/201606-12" }, { "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": [ "Patch" ], "url": "https://www.libssh2.org/CVE-2016-0787.patch" }, { "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": [ "Vendor Advisory" ], "url": "https://www.libssh2.org/adv_20160223.html" } ], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Deferred", "weaknesses": [ { "description": [ { "lang": "en", "value": "CWE-200" } ], "source": "nvd@nist.gov", "type": "Primary" } ] }
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Sightings
Author | Source | Type | Date |
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Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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