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From: Avital Ostromich
Reply-To: Ubuntu Security
To: ubuntu-security-announce@lists.ubuntu.com
Message-ID:
Subject: [USN-4888-2] ldb vulnerabilities
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==========================================================================
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:
https://ubuntu.com/security/notices/USN-4888-2
https://ubuntu.com/security/notices/USN-4888-1
CVE-2020-27840, CVE-2021-20277
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