CVE-2006-0150: Multiple format string vulnerabilities in the auth_ldap_log_reason function in Apache auth_ldap 1.6.0 and earl

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HIGH 7.5WATCHLISTDOWNGRADE

CVE-2006-0150 is a high-severity flaw (CVSS 7.5) affecting auth ldap. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple format string vulnerabilities in the auth_ldap_log_reason function in Apache auth_ldap 1.6.0 and earlier allows remote attackers to execute arbitrary code via various vectors, including the username.

Why this priority

High severity
EPSS top 7%: very likely to be exploited
On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	5.4% (top 7%)
CISA exploited list	No
Weakness	CWE-134
Published	2006-01-09
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: dave carrigan

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

Am I affected?

Timeline

2006-01-09 23:03 UTCPublished CVE record published
2026-06-16 22:19 UTCUpdated Record last modified

dave carrigan auth ldap DOWNGRADE

Affected: 1.2.1 · 1.2.2 · 1.2.3 · 1.2.4 · 1.3.0 · 1.3.1 · 1.3.2 · 1.3.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.2.1

1. Check installed version

apt-cache policy auth-ldap || rpm -q auth-ldap || auth-ldap --version

2. No fixed release: DOWNGRADE to a release before 1.2.1 (Debian / Ubuntu)

apt-cache madison auth-ldap sudo apt install auth-ldap=<VERSION_BEFORE_1.2.1> sudo apt-mark hold auth-ldap

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list auth-ldap sudo dnf downgrade auth-ldap-<VERSION_BEFORE_1.2.1> sudo dnf versionlock add auth-ldap

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2006-0150?

auth ldap: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2006-0150 being exploited?

CVE-2006-0150 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-2006-0150 affect?

CVE-2006-0150 affects auth ldap. Severity is high (CVSS 7.5). Multiple format string vulnerabilities in the auth_ldap_log_reason function in Apache auth_ldap 1.6.0 and earlier allows remote attackers to execute arbitrary code via various vectors, including the username.

How urgent is CVE-2006-0150?

Priority 54/100. High severity; EPSS top 7%: very likely to be exploited; On your watchlist

References

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