CVE-2020-36227 Denial of service in n/a
An attacker can cause a denial of service in OpenLDAP slapd by triggering an infinite loop via the cancel_extop Cancel operation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-36227?
CVE-2020-36227 is a high-severity denial of service vulnerability in Apple Macos, published on 25 Jan 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A flaw was discovered in OpenLDAP before 2.4.57 leading to an infinite loop in slapd with the cancel_extop Cancel operation, resulting in denial of service.
Weakness: CWE-835
Which versions are affected by CVE-2020-36227?
1 open source package ship an affected version, including openldap. It affects 3 products.
| Package | Affected | Fixed in |
|---|---|---|
openldap Bitnami | All versions | 2.4.57 |
Products include Apple Macos, Debian Debian Linux, Openldap Openldap.
How do I fix CVE-2020-36227?
Upgrade openldap to 2.4.57 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-2020-36227 being exploited?
There is no known exploitation of CVE-2020-36227 in the wild and no public exploit code.
Other vulnerabilities in Apple Macos
Sources
Also known as ALPINE-CVE-2020-36227, BIT-openldap-2020-36227, CLEANSTART-2026-MA66302, DEBIAN-CVE-2020-36227, GHSA-6w5v-vmwv-xcwj, JLSEC-2026-169 and 1 more.