CVE-2020-25709 Denial of service in OpenLDAP

What is CVE-2020-25709?

CVE-2020-25709 is a high-severity denial of service vulnerability in Apple Mac Os X, published on 18 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A flaw was found in OpenLDAP. This flaw allows an attacker who can send a malicious packet to be processed by OpenLDAP’s slapd server, to trigger an assertion failure. The highest threat from this vulnerability is to system availability.

Weakness: CWE-617

Which versions are affected by CVE-2020-25709?

1 open source package ship an affected version, including openldap. It affects 5 products.

Products include Apple Mac Os X, Apple Macos, Debian Debian Linux, Openldap Openldap, Redhat Jboss Core Services.

How do I fix CVE-2020-25709?

Upgrade openldap to 2.4.56 or later.

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-2020-25709 being exploited?

There is no known exploitation of CVE-2020-25709 in the wild and no public exploit code.

Other vulnerabilities in Apple Mac Os X

• CVE-2014-7169 GNU Bourne-Again Shell (Bash) Arbitrary Code Execution Exploited Critical 9.8
• CVE-2014-6271 GNU Bourne-Again Shell (Bash) Arbitrary Code Execution Exploited Critical 9.8
• CVE-2012-1823 PHP-CGI Query String Parameter Exploited Critical 9.8
• CVE-2021-30713 Apple macOS Unspecified Exploited High 7.8
• CVE-2019-8526 Apple macOS Use-After-Free Exploited High 7.8

All Apple Mac Os X vulnerabilities

Sources

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

Also known as ALPINE-CVE-2020-25709, BIT-openldap-2020-25709, CLEANSTART-2026-WF14378, DEBIAN-CVE-2020-25709, GHSA-cpm7-pgmm-3mfr, JLSEC-2026-161 and 1 more.