gsd-2023-6918
Vulnerability from gsd
Modified
2023-12-19 06:01
Details
A flaw was found in the libssh implements abstract layer for message digest (MD) operations implemented by different supported crypto backends. The return values from these were not properly checked, which could cause low-memory situations failures, NULL dereferences, crashes, or usage of the uninitialized memory as an input for the KDF. In this case, non-matching keys will result in decryption/integrity failures, terminating the connection.
Aliases
{ "gsd": { "metadata": { "exploitCode": "unknown", "remediation": "unknown", "reportConfidence": "confirmed", "type": "vulnerability" }, "osvSchema": { "aliases": [ "CVE-2023-6918" ], "details": "A flaw was found in the libssh implements abstract layer for message digest (MD) operations implemented by different supported crypto backends. The return values from these were not properly checked, which could cause low-memory situations failures, NULL dereferences, crashes, or usage of the uninitialized memory as an input for the KDF. In this case, non-matching keys will result in decryption/integrity failures, terminating the connection.", "id": "GSD-2023-6918", "modified": "2023-12-19T06:01:18.007197Z", "schema_version": "1.4.0" } }, "namespaces": { "cve.org": { "CVE_data_meta": { "ASSIGNER": "secalert@redhat.com", "ID": "CVE-2023-6918", "STATE": "PUBLIC" }, "affects": { "vendor": { "vendor_data": [ { "product": { "product_data": [ { "product_name": "Red Hat Enterprise Linux 6", "version": { "version_data": [ { "version_value": "not down converted", "x_cve_json_5_version_data": { "defaultStatus": "unknown" } } ] } }, { "product_name": "Red Hat Enterprise Linux 7", "version": { "version_data": [ { "version_value": "not down converted", "x_cve_json_5_version_data": { "defaultStatus": "unknown" } }, { "version_value": "not down converted", "x_cve_json_5_version_data": { "defaultStatus": "unknown" } } ] } }, { "product_name": "Red Hat Enterprise Linux 8", "version": { "version_data": [ { "version_value": "not down converted", "x_cve_json_5_version_data": { "defaultStatus": "affected" } } ] } }, { "product_name": "Red Hat Enterprise Linux 9", "version": { "version_data": [ { "version_value": "not down converted", "x_cve_json_5_version_data": { "defaultStatus": "affected" } } ] } } ] }, "vendor_name": "Red Hat" } ] } }, "credits": [ { "lang": "en", "value": "Red Hat would like to thank Jack Weinstein (\u003cmike.code.bb.h@gmail.com\u003e) for reporting this issue." } ], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": { "description_data": [ { "lang": "eng", "value": "A flaw was found in the libssh implements abstract layer for message digest (MD) operations implemented by different supported crypto backends. The return values from these were not properly checked, which could cause low-memory situations failures, NULL dereferences, crashes, or usage of the uninitialized memory as an input for the KDF. In this case, non-matching keys will result in decryption/integrity failures, terminating the connection." } ] }, "impact": { "cvss": [ { "attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 3.7, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1" } ] }, "problemtype": { "problemtype_data": [ { "description": [ { "cweId": "CWE-252", "lang": "eng", "value": "Unchecked Return Value" } ] } ] }, "references": { "reference_data": [ { "name": "https://access.redhat.com/security/cve/CVE-2023-6918", "refsource": "MISC", "url": "https://access.redhat.com/security/cve/CVE-2023-6918" }, { "name": "https://bugzilla.redhat.com/show_bug.cgi?id=2254997", "refsource": "MISC", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2254997" }, { "name": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LZQVUHWVWRH73YBXUQJOD6CKHDQBU3DM/", "refsource": "MISC", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LZQVUHWVWRH73YBXUQJOD6CKHDQBU3DM/" }, { "name": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MKQRBF3DWMWPH36LBCOBUTSIZRTPEZXB/", "refsource": "MISC", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MKQRBF3DWMWPH36LBCOBUTSIZRTPEZXB/" }, { "name": "https://www.libssh.org/2023/12/18/libssh-0-10-6-and-libssh-0-9-8-security-releases/", "refsource": "MISC", "url": "https://www.libssh.org/2023/12/18/libssh-0-10-6-and-libssh-0-9-8-security-releases/" }, { "name": "https://www.libssh.org/security/advisories/CVE-2023-6918.txt", "refsource": "MISC", "url": "https://www.libssh.org/security/advisories/CVE-2023-6918.txt" } ] }, "work_around": [ { "lang": "en", "value": "Mitigation for this issue is either not available or the currently available options don\u0027t meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability." } ] }, "nvd.nist.gov": { "cve": { "configurations": [ { "nodes": [ { "cpeMatch": [ { "criteria": "cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*", "matchCriteriaId": "4836788D-9936-404F-B0A8-DDDAC3969F20", "versionEndExcluding": "0.9.8", "versionStartIncluding": "0.9.0", "vulnerable": true }, { "criteria": "cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*", "matchCriteriaId": "BCB546AC-788C-422E-B6BD-756BF39BD0F5", "versionEndExcluding": "0.10.6", "versionStartIncluding": "0.10.0", "vulnerable": true } ], "negate": false, "operator": "OR" } ] }, { "nodes": [ { "cpeMatch": [ { "criteria": "cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*", "matchCriteriaId": "CC559B26-5DFC-4B7A-A27C-B77DE755DFF9", "vulnerable": true }, { "criteria": "cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*", "matchCriteriaId": "B8EDB836-4E6A-4B71-B9B2-AA3E03E0F646", "vulnerable": true }, { "criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*", "matchCriteriaId": "F4CFF558-3C47-480D-A2F0-BABF26042943", "vulnerable": true }, { "criteria": "cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*", "matchCriteriaId": "7F6FB57C-2BC7-487C-96DD-132683AEB35D", "vulnerable": true } ], "negate": false, "operator": "OR" } ] } ], "descriptions": [ { "lang": "en", "value": "A flaw was found in the libssh implements abstract layer for message digest (MD) operations implemented by different supported crypto backends. The return values from these were not properly checked, which could cause low-memory situations failures, NULL dereferences, crashes, or usage of the uninitialized memory as an input for the KDF. In this case, non-matching keys will result in decryption/integrity failures, terminating the connection." }, { "lang": "es", "value": "Se encontr\u00f3 un fallo en la capa abstracta de implementaci\u00f3n de libssh para operaciones de resumen de mensajes (MD) implementadas por diferentes backends criptogr\u00e1ficos compatibles. Los valores de retorno de estos no se verificaron correctamente, lo que podr\u00eda causar fallas en situaciones de poca memoria, desreferencias NULL, fallas o uso de la memoria no inicializada como entrada para el KDF. En este caso, las claves que no coinciden resultar\u00e1n en fallas de descifrado/integridad, lo que terminar\u00e1 la conexi\u00f3n." } ], "id": "CVE-2023-6918", "lastModified": "2024-01-10T16:14:07.393", "metrics": { "cvssMetricV31": [ { "cvssData": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1" }, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary" }, { "cvssData": { "attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 3.7, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1" }, "exploitabilityScore": 2.2, "impactScore": 1.4, "source": "secalert@redhat.com", "type": "Secondary" } ] }, "published": "2023-12-19T00:15:08.460", "references": [ { "source": "secalert@redhat.com", "tags": [ "Mailing List", "Vendor Advisory" ], "url": "https://access.redhat.com/security/cve/CVE-2023-6918" }, { "source": "secalert@redhat.com", "tags": [ "Issue Tracking", "Third Party Advisory" ], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2254997" }, { "source": "secalert@redhat.com", "tags": [ "Third Party Advisory" ], "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LZQVUHWVWRH73YBXUQJOD6CKHDQBU3DM/" }, { "source": "secalert@redhat.com", "tags": [ "Mailing List", "Vendor Advisory" ], "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MKQRBF3DWMWPH36LBCOBUTSIZRTPEZXB/" }, { "source": "secalert@redhat.com", "tags": [ "Release Notes" ], "url": "https://www.libssh.org/2023/12/18/libssh-0-10-6-and-libssh-0-9-8-security-releases/" }, { "source": "secalert@redhat.com", "tags": [ "Vendor Advisory" ], "url": "https://www.libssh.org/security/advisories/CVE-2023-6918.txt" } ], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Analyzed", "weaknesses": [ { "description": [ { "lang": "en", "value": "CWE-252" } ], "source": "nvd@nist.gov", "type": "Primary" }, { "description": [ { "lang": "en", "value": "CWE-252" } ], "source": "secalert@redhat.com", "type": "Secondary" } ] } } } }
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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.