CVE-2002-0735: Format string vulnerability in the logging() function in C-Note Squid LDAP authentication module (squid_auth_L

This month

HIGH 7.5DOWNGRADEDOWNGRADEDOWNGRADE

CVE-2002-0735 is a high-severity flaw (CVSS 7.5) affecting squid auth ldap, nss ldap, pam ldap. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Format string vulnerability in the logging() function in C-Note Squid LDAP authentication module (squid_auth_LDAP) 2.0.2 and earlier allows remote attackers to cause a denial of service and possibly execute arbitrary code by triggering log messages.

Why this priority

High severity

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	2.9% (top 13%)
CISA exploited list	No
Published	2002-08-12
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: c-note · padl software

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

Am I affected?

Timeline

2002-08-12 04:00 UTCPublished CVE record published
2026-06-16 21:58 UTCUpdated Record last modified

c-note squid auth ldap DOWNGRADE

Affected: 1.0.1 · 1.0.2_beta · 1.2_b2 · 2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.0.1 (Debian / Ubuntu)

apt-cache madison squid-auth-ldap sudo apt install squid-auth-ldap=<VERSION_BEFORE_1.0.1> sudo apt-mark hold squid-auth-ldap

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

dnf --showduplicates list squid-auth-ldap sudo dnf downgrade squid-auth-ldap-<VERSION_BEFORE_1.0.1> sudo dnf versionlock add squid-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.

padl software nss ldap DOWNGRADE

Affected: build_180 · build_181 · build_183 · build_184 · build_185 · build_185.1 · build_185.2 · build_185.3

Fixed in: no fixed release known

Safe to downgrade to: a release before build_180

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before build_180 (Debian / Ubuntu)

apt-cache madison nss-ldap sudo apt install nss-ldap=<VERSION_BEFORE_build_180> sudo apt-mark hold nss-ldap

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

dnf --showduplicates list nss-ldap sudo dnf downgrade nss-ldap-<VERSION_BEFORE_build_180> sudo dnf versionlock add nss-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.

padl software pam ldap DOWNGRADE

Affected: build_143

Fixed in: no fixed release known

Safe to downgrade to: a release before build_143

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before build_143 (Debian / Ubuntu)

apt-cache madison pam-ldap sudo apt install pam-ldap=<VERSION_BEFORE_build_143> sudo apt-mark hold pam-ldap

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

dnf --showduplicates list pam-ldap sudo dnf downgrade pam-ldap-<VERSION_BEFORE_build_143> sudo dnf versionlock add pam-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-2002-0735?

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

Is CVE-2002-0735 being exploited?

CVE-2002-0735 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-2002-0735 affect?

CVE-2002-0735 affects squid auth ldap, nss ldap, pam ldap. Severity is high (CVSS 7.5). Format string vulnerability in the logging() function in C-Note Squid LDAP authentication module (squid_auth_LDAP) 2.0.2 and earlier allows remote attackers to cause a denial of service and possibly execute arbitrary code by triggering log

How urgent is CVE-2002-0735?

Priority 48/100. High severity

Software pages

Squid vulnerabilities

References

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