RHSA-2012:1139
Vulnerability from csaf_redhat - Published: 2012-08-03 00:14 - Updated: 2025-11-21 17:41Summary
Red Hat Security Advisory: bind-dyndb-ldap security update
Notes
Topic
An updated bind-dyndb-ldap package that fixes one security issue is now
available for Red Hat Enterprise Linux 6.
The Red Hat Security Response Team has rated this update as having
important security impact. A Common Vulnerability Scoring System (CVSS)
base score, which gives a detailed severity rating, is available from the
CVE link in the References section.
Details
The dynamic LDAP back end is a plug-in for BIND that provides back-end
capabilities to LDAP databases. It features support for dynamic updates and
internal caching that help to reduce the load on LDAP servers.
A flaw was found in the way bind-dyndb-ldap performed the escaping of names
from DNS requests for use in LDAP queries. A remote attacker able to send
DNS queries to a named server that is configured to use bind-dyndb-ldap
could use this flaw to cause named to exit unexpectedly with an assertion
failure. (CVE-2012-3429)
Red Hat would like to thank Sigbjorn Lie of Atea Norway for reporting this
issue.
All bind-dyndb-ldap users should upgrade to this updated package, which
contains a backported patch to correct this issue. For the update to take
effect, the named service must be restarted.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
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"text": "The dynamic LDAP back end is a plug-in for BIND that provides back-end\ncapabilities to LDAP databases. It features support for dynamic updates and\ninternal caching that help to reduce the load on LDAP servers.\n\nA flaw was found in the way bind-dyndb-ldap performed the escaping of names\nfrom DNS requests for use in LDAP queries. A remote attacker able to send\nDNS queries to a named server that is configured to use bind-dyndb-ldap\ncould use this flaw to cause named to exit unexpectedly with an assertion\nfailure. (CVE-2012-3429)\n\nRed Hat would like to thank Sigbjorn Lie of Atea Norway for reporting this\nissue.\n\nAll bind-dyndb-ldap users should upgrade to this updated package, which\ncontains a backported patch to correct this issue. For the update to take\neffect, the named service must be restarted.",
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"discovery_date": "2012-07-20T00:00:00+00:00",
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{
"category": "description",
"text": "The dns_to_ldap_dn_escape function in src/ldap_convert.c in bind-dyndb-ldap 1.1.0rc1 and earlier does not properly escape distinguished names (DN) for LDAP queries, which allows remote DNS servers to cause a denial of service (named service hang) via a \"$\" character in a DN in a DNS query.",
"title": "Vulnerability description"
},
{
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"text": "bind-dyndb-ldap: named DoS via DNS query with $ in name",
"title": "Vulnerability summary"
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{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
"fixed": [
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2012-3429"
},
{
"category": "external",
"summary": "RHBZ#842466",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=842466"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2012-3429",
"url": "https://www.cve.org/CVERecord?id=CVE-2012-3429"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2012-3429",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2012-3429"
}
],
"release_date": "2012-08-01T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2012-08-03T00:14:00+00:00",
"details": "Before applying this update, make sure all previously-released errata\nrelevant to your system have been applied.\n\nThis update is available via the Red Hat Network. Details on how to\nuse the Red Hat Network to apply this update are available at\nhttps://access.redhat.com/knowledge/articles/11258",
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],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2012:1139"
}
],
"scores": [
{
"cvss_v2": {
"accessComplexity": "MEDIUM",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 4.3,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
"version": "2.0"
},
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}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "bind-dyndb-ldap: named DoS via DNS query with $ in name"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
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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