[USN-4888-2] ldb vulnerabilities

========================================================================== Ubuntu Security Notice USN-4888-2 March 25, 2021
ldb vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 14.04 ESM
Summary:
Several security issues were fixed in ldb.
Software Description: – 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 ESM: 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: ubuntu.com/security/notices/USN-4888-2 ubuntu.com/security/notices/USN-4888-1 CVE-2020-27840, CVE-2021-20277