FKIE_CVE-2011-1024
Vulnerability from fkie_nvd - Published: 2011-03-20 02:00 - Updated: 2026-06-16 23:28
Severity
Summary
chain.c in back-ldap in OpenLDAP 2.4.x before 2.4.24, when a master-slave configuration with a chain overlay and ppolicy_forward_updates (aka authentication-failure forwarding) is used, allows remote authenticated users to bypass external-program authentication by sending an invalid password to a slave server.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| openldap | openldap | 2.4.6 | |
| openldap | openldap | 2.4.7 | |
| openldap | openldap | 2.4.8 | |
| openldap | openldap | 2.4.9 | |
| openldap | openldap | 2.4.10 | |
| openldap | openldap | 2.4.11 | |
| openldap | openldap | 2.4.12 | |
| openldap | openldap | 2.4.13 | |
| openldap | openldap | 2.4.14 | |
| openldap | openldap | 2.4.15 | |
| openldap | openldap | 2.4.16 | |
| openldap | openldap | 2.4.17 | |
| openldap | openldap | 2.4.18 | |
| openldap | openldap | 2.4.19 | |
| openldap | openldap | 2.4.20 | |
| openldap | openldap | 2.4.21 | |
| openldap | openldap | 2.4.22 | |
| openldap | openldap | 2.4.23 |
{
"affected": [
{
"affectedData": [
{
"product": "n/a",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
],
"source": "secalert@redhat.com"
}
],
"configurations": [
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],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "chain.c in back-ldap in OpenLDAP 2.4.x before 2.4.24, when a master-slave configuration with a chain overlay and ppolicy_forward_updates (aka authentication-failure forwarding) is used, allows remote authenticated users to bypass external-program authentication by sending an invalid password to a slave server."
},
{
"lang": "es",
"value": "chain.c en back-ldap en OpenLDAP v2.4.x anteriores a v2.4.24 cuando se utiliza una configuraci\u00f3n maestro-esclavo con una superposici\u00f3n de la cadena y policy_forward_updates (tambi\u00e9n conocido como authentication-failure forwarding), permite a usuarios remotos autenticados eludir la autenticaci\u00f3n por programa externo mediante el env\u00edo de una contrase\u00f1a no v\u00e1lida para un servidor esclavo."
}
],
"id": "CVE-2011-1024",
"lastModified": "2026-06-16T23:28:34.620",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "HIGH",
"accessVector": "NETWORK",
"authentication": "SINGLE",
"availabilityImpact": "PARTIAL",
"baseScore": 4.6,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:H/Au:S/C:P/I:P/A:P",
"version": "2.0"
},
"exploitabilityScore": 3.9,
"impactScore": 6.4,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
]
},
"published": "2011-03-20T02:00:03.627",
"references": [
{
"source": "secalert@redhat.com",
"url": "http://kb.juniper.net/InfoCenter/index?page=content\u0026id=JSA10705"
},
{
"source": "secalert@redhat.com",
"url": "http://kb.juniper.net/InfoCenter/index?page=content\u0026id=JSA10735"
},
{
"source": "secalert@redhat.com",
"url": "http://openwall.com/lists/oss-security/2011/02/24/12"
},
{
"source": "secalert@redhat.com",
"url": "http://openwall.com/lists/oss-security/2011/02/25/13"
},
{
"source": "secalert@redhat.com",
"tags": [
"Vendor Advisory"
],
"url": "http://secunia.com/advisories/43331"
},
{
"source": "secalert@redhat.com",
"url": "http://secunia.com/advisories/43708"
},
{
"source": "secalert@redhat.com",
"url": "http://secunia.com/advisories/43718"
},
{
"source": "secalert@redhat.com",
"url": "http://security.gentoo.org/glsa/glsa-201406-36.xml"
},
{
"source": "secalert@redhat.com",
"url": "http://securitytracker.com/id?1025188"
},
{
"source": "secalert@redhat.com",
"url": "http://www.mandriva.com/security/advisories?name=MDVSA-2011:055"
},
{
"source": "secalert@redhat.com",
"url": "http://www.mandriva.com/security/advisories?name=MDVSA-2011:056"
},
{
"source": "secalert@redhat.com",
"tags": [
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],
"url": "http://www.openldap.org/devel/cvsweb.cgi/servers/slapd/back-ldap/chain.c.diff?r1=1.76\u0026r2=1.77\u0026hideattic=1\u0026sortbydate=0"
},
{
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"url": "http://www.openldap.org/its/index.cgi/Software%20Bugs?id=6607"
},
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"url": "http://www.openldap.org/lists/openldap-announce/201102/msg00000.html"
},
{
"source": "secalert@redhat.com",
"url": "http://www.openldap.org/lists/openldap-technical/201004/msg00247.html"
},
{
"source": "secalert@redhat.com",
"url": "http://www.redhat.com/support/errata/RHSA-2011-0346.html"
},
{
"source": "secalert@redhat.com",
"url": "http://www.redhat.com/support/errata/RHSA-2011-0347.html"
},
{
"source": "secalert@redhat.com",
"url": "http://www.ubuntu.com/usn/USN-1100-1"
},
{
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"tags": [
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],
"url": "http://www.vupen.com/english/advisories/2011/0665"
},
{
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"url": "https://bugzilla.novell.com/show_bug.cgi?id=674985"
},
{
"source": "secalert@redhat.com",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=680466"
},
{
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"url": "http://kb.juniper.net/InfoCenter/index?page=content\u0026id=JSA10705"
},
{
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"url": "http://kb.juniper.net/InfoCenter/index?page=content\u0026id=JSA10735"
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{
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"url": "http://openwall.com/lists/oss-security/2011/02/24/12"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://openwall.com/lists/oss-security/2011/02/25/13"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://secunia.com/advisories/43708"
},
{
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"url": "http://secunia.com/advisories/43718"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://security.gentoo.org/glsa/glsa-201406-36.xml"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://securitytracker.com/id?1025188"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.mandriva.com/security/advisories?name=MDVSA-2011:055"
},
{
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"url": "http://www.mandriva.com/security/advisories?name=MDVSA-2011:056"
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{
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"tags": [
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},
{
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"url": "http://www.openldap.org/its/index.cgi/Software%20Bugs?id=6607"
},
{
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"tags": [
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"url": "http://www.openldap.org/lists/openldap-announce/201102/msg00000.html"
},
{
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"url": "http://www.openldap.org/lists/openldap-technical/201004/msg00247.html"
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{
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},
{
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"url": "http://www.redhat.com/support/errata/RHSA-2011-0347.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.ubuntu.com/usn/USN-1100-1"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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],
"url": "http://www.vupen.com/english/advisories/2011/0665"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://bugzilla.novell.com/show_bug.cgi?id=674985"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=680466"
}
],
"sourceIdentifier": "secalert@redhat.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-264"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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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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