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Ubuntu 14.04: OpenLDAP Important Denial of Service Fix USN-7698-1

ubuntu
Calendar Grey August 18, 2025
Dist Ubuntu Esm H88
Key challenges addressed in OpenLDAP for Ubuntu, safeguarding system stability and effectively mitigating DoS vulnerabilities.
Several security issues were fixed in OpenLDAP.

Summary

Several security issues were fixed in OpenLDAP.

Software Description:

- openldap: Lightweight Directory Access Protocol

Details:

It was discovered that OpenLDAP incorrectly handled Certificate Exact

Assertion processing. A remote attacker could possibly use this issue to

cause OpenLDAP to crash, resulting in a denial of service. (CVE-2020-36221)

It was discovered that OpenLDAP incorrectly handled saslAuthzTo processing.

A remote attacker could use this issue to cause OpenLDAP to crash,

resulting in a denial of service, or possibly execute arbitrary code.

(CVE-2020-36222, CVE-2020-36224, CVE-2020-36225, CVE-2020-36226)

It was discovered that OpenLDAP incorrectly handled Return Filter control

handling. A remote attacker could use this issue to cause OpenLDAP to

crash, resulting in a denial of service, or possibly execute arbitrary

code. (CVE-2020-36223)

It was discovered that OpenLDAP incorrectly handled certain cancel

operations. A remote attacker could possibly use this issue...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service update Ubuntu important openldap

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 14.04 LTS
  slapd                           2.4.31-1+nmu2ubuntu8.5+esm7
                                  Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-7698-1

CVE-2020-36221, CVE-2020-36222, CVE-2020-36223, CVE-2020-36224,

CVE-2020-36225, CVE-2020-36226, CVE-2020-36227, CVE-2020-36228

Severity
important
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7698-1

Topics%20covered

Topics Covered

security advisory denial of service update Ubuntu important openldap

Package Information

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