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Ubuntu Security Notice USN-6596-1
January 24, 2024

libapache-session-ldap-perl vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

• Ubuntu 20.04 LTS
• Ubuntu 18.04 LTS (Available with Ubuntu Pro)
• Ubuntu 16.04 LTS (Available with Ubuntu Pro)

Summary:

Apache::Session::LDAP could be made to expose sensitive information through
spoofing if it received invalid X.509 certificate.

Software Description:

• libapache-session-ldap-perl: Apache::Session::LDAP Perl module - Store Apache
  Session in LDAP

Details:

It was discovered that Apache::Session::LDAP incorrectly handled invalid X.509
certificates. If a user or an automated system were tricked into opening a
specially crafted invalid X.509 certificate, a remote attacker could possibly
use this issue to perform spoofing and obtain sensitive information.

Update instructions:

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

Ubuntu 20.04 LTS:
libapache-session-ldap-perl 0.4-1+deb10u1build0.20.04.1

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
libapache-session-ldap-perl 0.4-1ubuntu0.18.04.1~esm1

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
libapache-session-ldap-perl 0.4-1ubuntu0.16.04.1~esm1

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

References:
https://ubuntu.com/security/notices/USN-6596-1
CVE-2020-36658

Package Information:

https://launchpad.net/ubuntu/+source/libapache-session-ldap-perl/0.4-1+deb10u1build0.20.04.1