CVE-2011-1527

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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:mit:kerberos_5:1.9:*:*:*:*:*:*:*", "matchCriteriaId": "86738633-C081-4440-9F75-A775D6DF2228", "vulnerable": true}, {"criteria": "cpe:2.3:a:mit:kerberos_5:1.9.1:*:*:*:*:*:*:*", "matchCriteriaId": "C7BCFFEE-EA7A-4F26-97AA-31128A179745", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The kdb_ldap plugin in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.9 through 1.9.1, when the LDAP back end is used, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a kinit operation with incorrect string case for the realm, related to the is_principal_in_realm, krb5_set_error_message, krb5_ldap_get_principal, and process_as_req functions."}, {"lang": "es", "value": "El plug-in kdb_ldap en el centro de distribuci\u00f3n de claves (KDC) en MIT Kerberos 5 (krb5) v1.9 a v1.9.1, cuando el back end LDAP es utilizado, permite a atacantes remotos provocar una denegaci\u00f3n de servicio (puntero a NULL y ca\u00edda del demonio) a trav\u00e9s de una operaci\u00f3n de kinit en la cadena incorrecta, en relaci\u00f3n con la is_principal_in_realm, krb5_set_error_message, krb5_ldap_get_principal, y las funciones process_as_req."}], "id": "CVE-2011-1527", "lastModified": "2026-06-16T23:29:33.533", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 7.8, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 6.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}]}, "published": "2011-10-20T21:55:00.857", "references": [{"source": "cve@mitre.org", "url": "http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=629558"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2011-006.txt"}, {"source": "cve@mitre.org", "tags": ["US Government Resource"], "url": "http://www.kb.cert.org/vuls/id/659251"}, {"source": "cve@mitre.org", "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2011:159"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "http://www.redhat.com/support/errata/RHSA-2011-1379.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=629558"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2011-006.txt"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["US Government Resource"], "url": "http://www.kb.cert.org/vuls/id/659251"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2011:159"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "http://www.redhat.com/support/errata/RHSA-2011-1379.html"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank MIT Kerberos project for reporting this issue. Upstream acknowledges Andrej Ota as the original reporter.", "affected_release": [{"advisory": "RHSA-2011:1379", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "krb5-0:1.9-9.el6_1.2", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2011-10-18T00:00:00Z"}], "bugzilla": {"description": "krb5: KDC denial of service vulnerabilities (MITKRB5-SA-2011-006)", "id": "737711", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=737711"}, "csaw": false, "cvss": {"cvss_base_score": "5.0", "cvss_scoring_vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "status": "verified"}, "details": ["The kdb_ldap plugin in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.9 through 1.9.1, when the LDAP back end is used, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a kinit operation with incorrect string case for the realm, related to the is_principal_in_realm, krb5_set_error_message, krb5_ldap_get_principal, and process_as_req functions."], "name": "CVE-2011-1527", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:3", "fix_state": "Not affected", "package_name": "krb5", "product_name": "Red Hat Enterprise Linux 3"}, {"cpe": "cpe:/o:redhat:enterprise_linux:4", "fix_state": "Not affected", "package_name": "krb5", "product_name": "Red Hat Enterprise Linux 4"}, {"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "krb5", "product_name": "Red Hat Enterprise Linux 5"}], "public_date": "2011-10-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2011-1527\nhttps://nvd.nist.gov/vuln/detail/CVE-2011-1527"], "threat_severity": "Moderate"}

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