CVE-2012-3429: The dns_to_ldap_dn_escape function in src/ldap_convert.c in bind-dyndb-ldap 1.1.0rc1 and earlier does not prop

Q: How do I fix CVE-2012-3429?

bind-dyndb-ldap: upgrade to newer than 1.1.0. Exact commands for each OS are on this page.

Q: Is CVE-2012-3429 being exploited?

CVE-2012-3429 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2012-3429 affect?

CVE-2012-3429 affects bind-dyndb-ldap. Severity is medium (CVSS 5.0). 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

Q: How urgent is CVE-2012-3429?

Priority 44/100. Public exploit reference

This month

MEDIUM 5.0UPGRADE

CVE-2012-3429 is a medium-severity flaw (CVSS 5.0) affecting bind-dyndb-ldap. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	3.1% (top 12%)
CISA exploited list	No
Weakness	CWE-20
Published	2012-08-07
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: martin nagy

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2012-08-07 21:55 UTCPublished CVE record published
2026-06-16 23:43 UTCUpdated Record last modified

martin nagy bind-dyndb-ldap UPGRADE

Affected: <= 1.1.0 · 0.1.0 a1 · 0.1.0 b · 0.2.0 · 1.0.0 b1 · 1.0.0 rc1 · 1.1.0 a1 · 1.1.0 a2

Fixed in: newer than 1.1.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy bind-dyndb-ldap || rpm -q bind-dyndb-ldap || bind-dyndb-ldap --version

2. UPGRADE to newer than 1.1.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade bind-dyndb-ldap

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade bind-dyndb-ldap

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2012-3429?

bind-dyndb-ldap: upgrade to newer than 1.1.0. Exact commands for each OS are on this page.

Is CVE-2012-3429 being exploited?

CVE-2012-3429 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2012-3429 affect?

CVE-2012-3429 affects bind-dyndb-ldap. Severity is medium (CVSS 5.0). 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

How urgent is CVE-2012-3429?

Priority 44/100. Public exploit reference

Related CVEs

CVE-2012-2134 MEDIUM 4.3 UPGRADE The handle_connection_error function in ldap_helper.c in bind-dyndb-ldap before 1.1.0rc1 does not properly han

References

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