Ubuntu Security Notice 5508-1 - It was discovered that Python LDAP incorrectly handled certain regular expressions. An remote attacker could possibly use this issue to cause a denial of service.
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Ubuntu Security Notice USN-5508-1
July 11, 2022
python-ldap vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 22.04 LTS
- Ubuntu 21.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
Summary:
Python LDAP could be made to denial of service if it received a specially
crafted regular expression.
Software Description:
- python-ldap: LDAP interface module for Python3
Details:
It was discovered that Python LDAP incorrectly handled certain regular expressions.
An remote attacker could possibly use this issue to cause a denial of service.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 22.04 LTS:
python3-ldap 3.2.0-4ubuntu7.1
python3-pyldap 3.2.0-4ubuntu7.1
Ubuntu 21.10:
python3-ldap 3.2.0-4ubuntu5.1
python3-pyldap 3.2.0-4ubuntu5.1
Ubuntu 20.04 LTS:
python3-ldap 3.2.0-4ubuntu2.1
python3-pyldap 3.2.0-4ubuntu2.1
Ubuntu 18.04 LTS:
python-ldap 3.0.0-1ubuntu0.2
python-pyldap 3.0.0-1ubuntu0.2
python3-ldap 3.0.0-1ubuntu0.2
python3-pyldap 3.0.0-1ubuntu0.2
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-5508-1
CVE-2021-46823
Package Information:
https://launchpad.net/ubuntu/+source/python-ldap/3.2.0-4ubuntu7.1
https://launchpad.net/ubuntu/+source/python-ldap/3.2.0-4ubuntu5.1
https://launchpad.net/ubuntu/+source/python-ldap/3.2.0-4ubuntu2.1
https://launchpad.net/ubuntu/+source/python-ldap/3.0.0-1ubuntu0.2