CVE-2023-2283

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2023-2283", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "assignerShortName": "redhat", "dateUpdated": "2025-11-03T20:35:18.528Z", "dateReserved": "2023-04-25T00:00:00.000Z", "datePublished": "2023-05-26T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2024-02-01T17:06:59.699Z"}, "descriptions": [{"lang": "en", "value": "A vulnerability was found in libssh, where the authentication check of the connecting client can be bypassed in the`pki_verify_data_signature` function in memory allocation problems. This issue may happen if there is insufficient memory or the memory usage is limited. The problem is caused by the return value `rc,` which is initialized to SSH_ERROR and later rewritten to save the return value of the function call `pki_key_check_hash_compatible.` The value of the variable is not changed between this point and the cryptographic verification. Therefore any error between them calls `goto error` returning SSH_OK."}], "affected": [{"vendor": "n/a", "product": "libssh", "versions": [{"version": "libssh-2", "status": "affected"}]}], "references": [{"url": "https://access.redhat.com/security/cve/CVE-2023-2283"}, {"url": "https://www.libssh.org/security/advisories/CVE-2023-2283.txt"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2189736"}, {"name": "FEDORA-2023-5fa5ca2043", "tags": ["vendor-advisory"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/27PD44ALQTZXX7K6JAM3BXBUHYA6DFFN/"}, {"url": "http://packetstormsecurity.com/files/172861/libssh-0.9.6-0.10.4-pki_verify_data_signature-Authorization-Bypass.html"}, {"name": "GLSA-202312-05", "tags": ["vendor-advisory"], "url": "https://security.gentoo.org/glsa/202312-05"}, {"url": "https://security.netapp.com/advisory/ntap-20240201-0005/"}], "problemTypes": [{"descriptions": [{"type": "CWE", "lang": "en", "description": "CWE-287", "cweId": "CWE-287"}]}]}, "adp": [{"title": "CVE Program Container", "references": [{"url": "https://access.redhat.com/security/cve/CVE-2023-2283", "tags": ["x_transferred"]}, {"url": "https://www.libssh.org/security/advisories/CVE-2023-2283.txt", "tags": ["x_transferred"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2189736", "tags": ["x_transferred"]}, {"name": "FEDORA-2023-5fa5ca2043", "tags": ["vendor-advisory", "x_transferred"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/27PD44ALQTZXX7K6JAM3BXBUHYA6DFFN/"}, {"url": "http://packetstormsecurity.com/files/172861/libssh-0.9.6-0.10.4-pki_verify_data_signature-Authorization-Bypass.html", "tags": ["x_transferred"]}, {"name": "GLSA-202312-05", "tags": ["vendor-advisory", "x_transferred"], "url": "https://security.gentoo.org/glsa/202312-05"}, {"url": "https://security.netapp.com/advisory/ntap-20240201-0005/", "tags": ["x_transferred"]}, {"url": "http://seclists.org/fulldisclosure/2025/Feb/18"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T20:35:18.528Z"}}]}}

{}

{"affected": [{"affectedData": [{"product": "libssh", "vendor": "n/a", "versions": [{"status": "affected", "version": "libssh-2"}]}], "source": "secalert@redhat.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*", "matchCriteriaId": "4ABFA49F-EB6C-45E4-8347-1E0A0FD65908", "versionEndIncluding": "0.9.6", "versionStartIncluding": "0.9.1", "vulnerable": true}, {"criteria": "cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*", "matchCriteriaId": "B02C8B4E-0AD2-44B9-B32A-21986D00F9F5", "versionEndIncluding": "0.10.4", "versionStartIncluding": "0.10.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*", "matchCriteriaId": "E30D0E6F-4AE8-4284-8716-991DFA48CC5D", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"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"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability was found in libssh, where the authentication check of the connecting client can be bypassed in the`pki_verify_data_signature` function in memory allocation problems. This issue may happen if there is insufficient memory or the memory usage is limited. The problem is caused by the return value `rc,` which is initialized to SSH_ERROR and later rewritten to save the return value of the function call `pki_key_check_hash_compatible.` The value of the variable is not changed between this point and the cryptographic verification. Therefore any error between them calls `goto error` returning SSH_OK."}], "id": "CVE-2023-2283", "lastModified": "2026-06-17T05:52:11.247", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 2.5, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2023-05-26T18:15:13.770", "references": [{"source": "secalert@redhat.com", "url": "http://packetstormsecurity.com/files/172861/libssh-0.9.6-0.10.4-pki_verify_data_signature-Authorization-Bypass.html"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/security/cve/CVE-2023-2283"}, {"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2189736"}, {"source": "secalert@redhat.com", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/27PD44ALQTZXX7K6JAM3BXBUHYA6DFFN/"}, {"source": "secalert@redhat.com", "url": "https://security.gentoo.org/glsa/202312-05"}, {"source": "secalert@redhat.com", "url": "https://security.netapp.com/advisory/ntap-20240201-0005/"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://www.libssh.org/security/advisories/CVE-2023-2283.txt"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://packetstormsecurity.com/files/172861/libssh-0.9.6-0.10.4-pki_verify_data_signature-Authorization-Bypass.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://seclists.org/fulldisclosure/2025/Feb/18"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/security/cve/CVE-2023-2283"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2189736"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/27PD44ALQTZXX7K6JAM3BXBUHYA6DFFN/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.gentoo.org/glsa/202312-05"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.netapp.com/advisory/ntap-20240201-0005/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.libssh.org/security/advisories/CVE-2023-2283.txt"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-287"}], "source": "secalert@redhat.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-287"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2023:3839", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "libssh-0:0.9.6-10.el8_8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2023-06-27T00:00:00Z"}, {"advisory": "RHSA-2023:3839", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "libssh-0:0.9.6-10.el8_8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2023-06-27T00:00:00Z"}, {"advisory": "RHSA-2024:0538", "cpe": "cpe:/a:redhat:rhel_eus:8.6", "package": "libssh-0:0.9.6-4.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Extended Update Support", "release_date": "2024-01-29T00:00:00Z"}, {"advisory": "RHSA-2023:6643", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "libssh-0:0.10.4-11.el9", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2023-11-07T00:00:00Z"}, {"advisory": "RHSA-2023:6643", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "libssh-0:0.10.4-11.el9", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2023-11-07T00:00:00Z"}], "bugzilla": {"description": "libssh: authorization bypass in pki_verify_data_signature", "id": "2189736", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2189736"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N", "status": "verified"}, "cwe": "CWE-287", "details": ["A vulnerability was found in libssh, where the authentication check of the connecting client can be bypassed in the`pki_verify_data_signature` function in memory allocation problems. This issue may happen if there is insufficient memory or the memory usage is limited. The problem is caused by the return value `rc,` which is initialized to SSH_ERROR and later rewritten to save the return value of the function call `pki_key_check_hash_compatible.` The value of the variable is not changed between this point and the cryptographic verification. Therefore any error between them calls `goto error` returning SSH_OK.", "A vulnerability was found in libssh, where the authentication check of the connecting client can be bypassed in the`pki_verify_data_signature` function in memory allocation problems. This issue may happen if there is insufficient memory or the memory usage is limited. The problem is caused by the return value `rc,` which is initialized to SSH_ERROR and later rewritten to save the return value of the function call `pki_key_check_hash_compatible.` The value of the variable is not changed between this point and the cryptographic verification. Therefore any error between them calls `goto error` returning SSH_OK."], "name": "CVE-2023-2283", "package_state": [{"cpe": "cpe:/a:redhat:cloudforms_managementengine:5", "fix_state": "Out of support scope", "package_name": "libssh2", "product_name": "CloudForms Management Engine 5"}, {"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": "Out of support scope", "package_name": "libssh", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "libssh2", "product_name": "Red Hat Enterprise Linux 7"}], "public_date": "2023-05-05T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-2283\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-2283\nhttps://www.libssh.org/security/advisories/CVE-2023-2283.txt"], "threat_severity": "Moderate"}

{}