CVE-2011-4079 (GCVE-0-2011-4079)
Vulnerability from cvelistv5 – Published: 2011-10-27 20:00 – Updated: 2024-08-06 23:53
VLAI
EPSS
VEX
Summary
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
No CVSS data available.
CWE
- n/a
Assigner
References
10 references
| URL | Tags |
|---|---|
| http://security.gentoo.org/glsa/glsa-201406-36.xml | vendor-advisoryx_refsource_GENTOO |
| http://www.openwall.com/lists/oss-security/2011/10/26/5 | mailing-listx_refsource_MLIST |
| http://www.openldap.org/its/index.cgi/Software%20… | x_refsource_MISC |
| https://bugzilla.redhat.com/show_bug.cgi?id=749324 | x_refsource_MISC |
| http://www.ubuntu.com/usn/USN-1266-1 | vendor-advisoryx_refsource_UBUNTU |
| http://secunia.com/advisories/46599 | third-party-advisoryx_refsource_SECUNIA |
| http://www.openldap.org/devel/gitweb.cgi?p=openld… | x_refsource_MISC |
| http://www.securityfocus.com/bid/50384 | vdb-entryx_refsource_BID |
| https://exchange.xforce.ibmcloud.com/vulnerabilit… | vdb-entryx_refsource_XF |
| http://www.openwall.com/lists/oss-security/2011/10/26/9 | mailing-listx_refsource_MLIST |
Date Public
2011-10-26 00:00
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{
"lang": "es",
"value": "Error por un paso en la funci\u00f3n UTF8StringNormalize en OpenLDAP 2.4.26 y versiones anteriores permite a atacantes remotos provocar una denegaci\u00f3n de servicio (ca\u00edda de slapd) a trav\u00e9s de una cadena de longitud cero que desencadena un desbordamiento de b\u00fafer basado en memoria din\u00e1mica, como se demuestra utilizando un valor vac\u00edo en el valor postalAddressAttribute en una entrada LDIF."
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"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openldap:openldap:2.3.36:*:*:*:*:*:*:*",
"matchCriteriaId": "87155B64-0AE1-4418-8866-84CEA879665B",
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},
{
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"matchCriteriaId": "A563D3EA-7DE0-4DE7-AD64-8724B6E72A6F",
"vulnerable": true
},
{
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"matchCriteriaId": "7AF66FA9-EE80-48DD-B10E-8D047CF4BC22",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openldap:openldap:2.3.39:*:*:*:*:*:*:*",
"matchCriteriaId": "1F11D98D-F23D-45B4-9733-B3C0C781ADCC",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openldap:openldap:2.3.40:*:*:*:*:*:*:*",
"matchCriteriaId": "2EFE64A8-3B40-44C9-983F-8F3BDC9879E0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openldap:openldap:2.3.41:*:*:*:*:*:*:*",
"matchCriteriaId": "C51880E8-AA9E-43AD-BDC3-3DA530823AAB",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openldap:openldap:2.3.42:*:*:*:*:*:*:*",
"matchCriteriaId": "D58AC865-207C-4612-B112-AE430BB76213",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openldap:openldap:2.3.43:*:*:*:*:*:*:*",
"matchCriteriaId": "EF350C0B-E6BF-4626-BA1D-DED83358D86A",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openldap:openldap:2.4.3:*:*:*:*:*:*:*",
"matchCriteriaId": "1ADA863D-EF8B-4A06-B94E-3DBF53063E6A",
"vulnerable": true
},
{
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"matchCriteriaId": "5EC66226-A597-4A4C-932F-F4A7BAE119C8",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openldap:openldap:2.4.7:*:*:*:*:*:*:*",
"matchCriteriaId": "4AEABC84-7B67-4FD4-A891-E52C80DC881E",
"vulnerable": true
},
{
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"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openldap:openldap:2.4.9:*:*:*:*:*:*:*",
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},
{
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"matchCriteriaId": "473AEC48-FBBF-4BEB-8728-1FA80DD94807",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openldap:openldap:2.4.11:*:*:*:*:*:*:*",
"matchCriteriaId": "7B0415EA-5F21-44C3-93F3-DDADBAA64449",
"vulnerable": true
},
{
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"matchCriteriaId": "16AFC655-E81F-4FDE-8030-9781A8B79E73",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openldap:openldap:2.4.13:*:*:*:*:*:*:*",
"matchCriteriaId": "E99FB859-D023-4B2B-A709-05E83A46E2A1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openldap:openldap:2.4.14:*:*:*:*:*:*:*",
"matchCriteriaId": "8D2EEBC7-1FAF-43E2-A124-C387C02D9E2B",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openldap:openldap:2.4.15:*:*:*:*:*:*:*",
"matchCriteriaId": "95D242E4-D5EB-4785-A6EF-60B1E8E2B0EC",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openldap:openldap:2.4.16:*:*:*:*:*:*:*",
"matchCriteriaId": "F6FEDD9C-FDF7-456A-B06C-0A4A4443991D",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openldap:openldap:2.4.17:*:*:*:*:*:*:*",
"matchCriteriaId": "9245CDE2-B90A-4D47-BA20-A7869FF0A645",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openldap:openldap:2.4.18:*:*:*:*:*:*:*",
"matchCriteriaId": "FB993E4D-E573-4495-97DE-465DDB2AA2DF",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openldap:openldap:2.4.19:*:*:*:*:*:*:*",
"matchCriteriaId": "D0F106A3-63D5-4D07-9440-6628DBA78BE5",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openldap:openldap:2.4.20:*:*:*:*:*:*:*",
"matchCriteriaId": "36CC03BC-DF34-43CD-90B0-27D23A1DD06A",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openldap:openldap:2.4.21:*:*:*:*:*:*:*",
"matchCriteriaId": "16C90FEE-527E-47F5-8840-517A55163D8E",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openldap:openldap:2.4.22:*:*:*:*:*:*:*",
"matchCriteriaId": "0FAEA812-BB47-47A3-A975-B3B8D30DBA36",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openldap:openldap:2.4.23:*:*:*:*:*:*:*",
"matchCriteriaId": "5DE5D180-3972-40A0-ADAF-A4F3364D1381",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:openldap:openldap:2.4.24:*:*:*:*:*:*:*",
"matchCriteriaId": "AD76F376-00D8-4917-BF68-6EECC316C331",
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},
{
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"matchCriteriaId": "F7063C11-3BF5-4037-ADC3-0C7E9AF830B4",
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}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "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."
},
{
"lang": "es",
"value": "Error por un paso en la funci\u00f3n UTF8StringNormalize en OpenLDAP 2.4.26 y versiones anteriores permite a atacantes remotos provocar una denegaci\u00f3n de servicio (ca\u00edda de slapd) a trav\u00e9s de una cadena de longitud cero que desencadena un desbordamiento de b\u00fafer basado en memoria din\u00e1mica, como se demuestra utilizando un valor vac\u00edo en el valor postalAddressAttribute en una entrada LDIF."
}
],
"id": "CVE-2011-4079",
"lastModified": "2026-04-29T01:13:23.040",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "SINGLE",
"availabilityImpact": "PARTIAL",
"baseScore": 4.0,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P",
"version": "2.0"
},
"exploitabilityScore": 8.0,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
]
},
"published": "2011-10-27T20:55:01.823",
"references": [
{
"source": "secalert@redhat.com",
"tags": [
"Vendor Advisory"
],
"url": "http://secunia.com/advisories/46599"
},
{
"source": "secalert@redhat.com",
"url": "http://security.gentoo.org/glsa/glsa-201406-36.xml"
},
{
"source": "secalert@redhat.com",
"url": "http://www.openldap.org/devel/gitweb.cgi?p=openldap.git%3Ba=commitdiff%3Bh=507238713b71208ec4f262f312cb495a302df9e9"
},
{
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"url": "http://www.openldap.org/its/index.cgi/Software%20Bugs?id=7059%3Bselectid=7059"
},
{
"source": "secalert@redhat.com",
"url": "http://www.openwall.com/lists/oss-security/2011/10/26/5"
},
{
"source": "secalert@redhat.com",
"url": "http://www.openwall.com/lists/oss-security/2011/10/26/9"
},
{
"source": "secalert@redhat.com",
"url": "http://www.securityfocus.com/bid/50384"
},
{
"source": "secalert@redhat.com",
"url": "http://www.ubuntu.com/usn/USN-1266-1"
},
{
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],
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},
{
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"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/70991"
},
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"tags": [
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],
"url": "http://secunia.com/advisories/46599"
},
{
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"url": "http://security.gentoo.org/glsa/glsa-201406-36.xml"
},
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"url": "http://www.openldap.org/devel/gitweb.cgi?p=openldap.git%3Ba=commitdiff%3Bh=507238713b71208ec4f262f312cb495a302df9e9"
},
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"url": "http://www.openldap.org/its/index.cgi/Software%20Bugs?id=7059%3Bselectid=7059"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.openwall.com/lists/oss-security/2011/10/26/5"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.openwall.com/lists/oss-security/2011/10/26/9"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.securityfocus.com/bid/50384"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.ubuntu.com/usn/USN-1266-1"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=749324"
},
{
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"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/70991"
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],
"sourceIdentifier": "secalert@redhat.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-189"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
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]
}
},
"redhat_vex": {
"aggregate_severity": "None",
"current_release_date": "2025-11-21T12:55:13+00:00",
"cve": "CVE-2011-4079",
"id": "CVE-2011-4079",
"initial_release_date": "2011-10-06T00:00:00+00:00",
"product_status:known_not_affected": "9",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "openldap: one-byte buffer overflow in slapd",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2011/cve-2011-4079.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-05-06T01:56:07Z",
"cve": "CVE-2011-4079",
"id": "CVE-2011-4079",
"initial_release_date": "2023-02-15T05:50:17Z",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2011-4079",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2011-4079.json",
"version": "3"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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