USN-4888-2: ldb vulnerabilities

Releases

• Ubuntu 14.04 ESM

Packages

• ldb - LDAP-like embedded database

Details

USN-4888-1 fixed several vulnerabilities in ldb. This update provides
the corresponding update for Ubuntu 14.04 ESM.

Original advisory details:

Douglas Bagnall discovered that ldb, when used with Samba, incorrectly
handled certain LDAP attributes. A remote attacker could possibly use this
issue to cause the LDAP server to crash, resulting in a denial of service.
(CVE-2021-20277)

Douglas Bagnall discovered that ldb, when used with Samba, incorrectly
handled certain DN strings. A remote attacker could use this issue to
cause the LDAP server to crash, resulting in a denial of service, or
possibly execute arbitrary code. (CVE-2020-27840)

Update instructions

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

Ubuntu 14.04

• libldb1 - 1:1.1.24-0ubuntu0.14.04.2+esm1

After a standard system update you need to restart applications using ldb,
such as Samba, to make all the necessary changes.

References

• CVE-2020-27840
• CVE-2021-20277

Related notices

• USN-4888-1: ldb-tools, libldb1, python3-ldb-dev, libldb-dev, libldb2, python3-ldb, ldb, python-ldb-dev, python-ldb