A lemonldap-ng security update has been released for Debian GNU/Linux 10 to address several vulnerabilities.

DSA 4943-1: lemonldap-ng security update

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Debian Security Advisory DSA-4943-1 security@debian.org
  https://www.debian.org/security/ Salvatore Bonaccorso
July 23, 2021   https://www.debian.org/security/faq
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Package : lemonldap-ng
CVE ID : CVE-2021-35472

Several vulnerabilities were discovered in lemonldap-ng, a Web-SSO
system. The flaws could result in information disclosure, authentication
bypass, or could allow an attacker to increase its authentication level
or impersonate another user, especially when lemonldap-ng is configured
to increase authentication level for users authenticated via a second
factor.

For the stable distribution (buster), these problems have been fixed in
version 2.0.2+ds-7+deb10u6.

We recommend that you upgrade your lemonldap-ng packages.

For the detailed security status of lemonldap-ng please refer to its
security tracker page at:
  https://security-tracker.debian.org/tracker/lemonldap-ng

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://www.debian.org/security/