{"id":"CVE-2011-4079","aliases":["DEBIAN-CVE-2011-4079","EUVD-2011-4030","GHSA-9v33-989g-pj7q"],"status":"published","title":"Off-by-one error in the UTF8StringNormalize function in OpenLDAP 2.4.26 and earlier allows remote...","description":"Off-by-one error in the UTF8StringNormalize function in OpenLDAP 2.4.26 and earlier allows remote attackers to cause a denial of service (slapd crash) via a zero-length string that triggers a heap-based buffer overflow, as demonstrated using an empty postalAddressAttribute value in an LDIF entry.","severity":{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:N/I:N/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.0327,"percentile":0.88482,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-189"],"published":"2011-10-27T20:00:00Z","modified":"2026-10-23T17:47:27Z","fixes":[{"ecosystem":"Debian:12","package":"openldap","fixed_in":["2.4.28-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"openldap","fixed_in":["2.4.28-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"openldap","fixed_in":["2.4.28-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"openldap","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.28-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"openldap","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.28-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"openldap","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.28-1"}]}]}],"products":[{"vendor":"openldap","product":"openldap"}],"references":[{"url":"http://security.gentoo.org/glsa/glsa-201406-36.xml","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred","advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2011/10/26/5","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"http://www.openldap.org/its/index.cgi/Software%20Bugs?id=7059%3Bselectid=7059","tags":["x_refsource_MISC","x_transferred","web"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=749324","tags":["x_refsource_MISC","x_transferred","Patch","fix"]},{"url":"http://www.ubuntu.com/usn/USN-1266-1","tags":["vendor-advisory","x_refsource_UBUNTU","x_transferred","advisory"]},{"url":"http://secunia.com/advisories/46599","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Vendor Advisory","advisory"]},{"url":"http://www.openldap.org/devel/gitweb.cgi?p=openldap.git%3Ba=commitdiff%3Bh=507238713b71208ec4f262f312cb495a302df9e9","tags":["x_refsource_MISC","x_transferred","web"]},{"url":"http://www.securityfocus.com/bid/50384","tags":["vdb-entry","x_refsource_BID","x_transferred","web"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/70991","tags":["vdb-entry","x_refsource_XF","x_transferred","web"]},{"url":"http://www.openwall.com/lists/oss-security/2011/10/26/9","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-4079"},{"url":"http://www.openldap.org/devel/gitweb.cgi?p=openldap.git;a=commitdiff;h=507238713b71208ec4f262f312cb495a302df9e9"},{"url":"http://www.openldap.org/its/index.cgi/Software%20Bugs?id=7059;selectid=7059"},{"url":"https://github.com/advisories/GHSA-9v33-989g-pj7q"},{"url":"https://security-tracker.debian.org/tracker/CVE-2011-4079","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2011-4079","description":"Off-by-one error in the UTF8StringNormalize function in OpenLDAP 2.4.26 and earlier allows remote attackers to cause a denial of service (slapd crash) via a zero-length string that triggers a heap-based buffer overflow, as demonstrated using an empty postalAddressAttribute value in an LDIF entry.","status":"published","published":"2011-10-27T20:00:00Z","modified":"2024-08-06T23:53:32.849Z","updated_at":"2026-11-02T14:35:37.989579Z"}],"euvd":[{"id":"EUVD-2011-4030","description":"Off-by-one error in the UTF8StringNormalize function in OpenLDAP 2.4.26 and earlier allows remote attackers to cause a denial of service (slapd crash) via a zero-length string that triggers a heap-based buffer overflow, as demonstrated using an empty postalAddressAttribute value in an LDIF entry.","status":"published","published":"2011-10-27T20:00:00Z","modified":"2024-08-06T23:53:32Z","updated_at":"2026-11-03T01:39:49.868954Z"}],"ghsa":[{"id":"GHSA-9v33-989g-pj7q","title":"Off-by-one error in the UTF8StringNormalize function in OpenLDAP 2.4.26 and earlier allows remote...","description":"Off-by-one error in the UTF8StringNormalize function in OpenLDAP 2.4.26 and earlier allows remote attackers to cause a denial of service (slapd crash) via a zero-length string that triggers a heap-based buffer overflow, as demonstrated using an empty postalAddressAttribute value in an LDIF entry.","status":"published","published":"2022-05-17T01:52:30Z","modified":"2023-02-21T05:06:07Z","updated_at":"2026-11-02T14:54:11.906282Z"}],"nvd":[{"id":"CVE-2011-4079","description":"Off-by-one error in the UTF8StringNormalize function in OpenLDAP 2.4.26 and earlier allows remote attackers to cause a denial of service (slapd crash) via a zero-length string that triggers a heap-based buffer overflow, as demonstrated using an empty postalAddressAttribute value in an LDIF entry.","status":"published","published":"2011-10-27T20:55:01.823Z","modified":"2026-06-16T23:34:23.25Z","cvss":[{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-189"],"updated_at":"2026-11-02T14:02:10.769216Z"}],"osv":[{"id":"CVE-2011-4079","description":"Off-by-one error in the UTF8StringNormalize function in OpenLDAP 2.4.26 and earlier allows remote attackers to cause a denial of service (slapd crash) via a zero-length string that triggers a heap-based buffer overflow, as demonstrated using an empty postalAddressAttribute value in an LDIF entry.","status":"published","published":"2011-10-27T20:55:01Z","modified":"2026-04-10T03:42:01.926393Z","updated_at":"2026-11-02T15:43:58.279353Z"},{"id":"DEBIAN-CVE-2011-4079","description":"Off-by-one error in the UTF8StringNormalize function in OpenLDAP 2.4.26 and earlier allows remote attackers to cause a denial of service (slapd crash) via a zero-length string that triggers a heap-based buffer overflow, as demonstrated using an empty postalAddressAttribute value in an LDIF entry.","status":"published","published":"2011-10-27T20:55:01.823Z","modified":"2026-10-23T17:47:27.230196473Z","updated_at":"2026-11-02T15:45:24.612044Z"}]}}