CVE-2001-0977 Denial of service in n/a

What is CVE-2001-0977?

CVE-2001-0977 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 25 Jun 2002. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

slapd in OpenLDAP 1.x before 1.2.12, and 2.x before 2.0.8, allows remote attackers to cause a denial of service (crash) via an invalid Basic Encoding Rules (BER) length field.

Which versions are affected by CVE-2001-0977?

It affects 6 products.

Products include Debian Debian Linux, Mandrakesoft Mandrake Linux, Mandrakesoft Mandrake Linux Corporate Server, Mandrakesoft Mandrake Single Network Firewall, Openldap Openldap, Redhat Linux.

How do I fix CVE-2001-0977?

No fix has been published for CVE-2001-0977 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2001-0977 being exploited?

There is no known exploitation of CVE-2001-0977 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-qh43-w96h-9v7c.