CVE-2020-36227

Publication date 26 January 2021

Last updated 18 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

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.

Status

Package Ubuntu Release Status
openldap 25.04 plucky
Fixed 2.4.57+dfsg-2ubuntu1
24.10 oracular
Fixed 2.4.57+dfsg-2ubuntu1
24.04 LTS noble
Fixed 2.4.57+dfsg-2ubuntu1
23.10 mantic
Fixed 2.4.57+dfsg-2ubuntu1
23.04 lunar
Fixed 2.4.57+dfsg-2ubuntu1
22.10 kinetic
Fixed 2.4.57+dfsg-2ubuntu1
22.04 LTS jammy
Fixed 2.4.57+dfsg-2ubuntu1
21.10 impish
Fixed 2.4.57+dfsg-2ubuntu1
21.04 hirsute
Fixed 2.4.57+dfsg-2ubuntu1
20.10 groovy
Fixed 2.4.53+dfsg-1ubuntu1.3
20.04 LTS focal
Fixed 2.4.49+dfsg-2ubuntu1.6
18.04 LTS bionic
Fixed 2.4.45+dfsg-1ubuntu1.9
16.04 LTS xenial
Fixed 2.4.42+dfsg-2ubuntu3.12
14.04 LTS trusty
Fixed 2.4.31-1+nmu2ubuntu8.5+esm7

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
openldap

Severity score breakdown

Parameter Value
Base score 7.5 · High
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-4724-1
    • OpenLDAP vulnerabilities
    • 8 February 2021
    • USN-7698-1
    • OpenLDAP vulnerabilities
    • 17 August 2025

Other references