Ubuntu alert USN-4888-1 (ldb)

From:
             
 
Marc Deslauriers <marc.deslauriers@canonical.com>
To:
             
 
"ubuntu-security-announce@lists.ubuntu.com" <ubuntu-security-announce@lists.ubuntu.com>
Subject:
             
 
[USN-4888-1] ldb vulnerabilities
Date:
             
 
Wed, 24 Mar 2021 14:35:46 -0400
Message-ID:
             
 
<6631e251-3609-1498-090c-371ced49374f@canonical.com>
==========================================================================
Ubuntu Security Notice USN-4888-1
March 24, 2021

ldb vulnerabilities
==========================================================================

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

- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in ldb.

Software Description:
- ldb: None

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 20.10:
  libldb2                         2:2.1.4-2ubuntu0.1

Ubuntu 20.04 LTS:
  libldb2                         2:2.0.10-0ubuntu0.20.04.3

Ubuntu 18.04 LTS:
  libldb1                         2:1.2.3-1ubuntu0.2

Ubuntu 16.04 LTS:
  libldb1                         2:1.1.24-1ubuntu3.2

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-4888-1
  CVE-2020-27840, CVE-2021-20277

Package Information:
  https://launchpad.net/ubuntu/+source/ldb/2:2.1.4-2ubuntu0.1
  https://launchpad.net/ubuntu/+source/ldb/2:2.0.10-0ubuntu...
  https://launchpad.net/ubuntu/+source/ldb/2:1.2.3-1ubuntu0.2
  https://launchpad.net/ubuntu/+source/ldb/2:1.1.24-1ubuntu3.2

-- 
ubuntu-security-announce mailing list
ubuntu-security-announce@lists.ubuntu.com
Modify settings or unsubscribe at:
https://lists.ubuntu.com/mailman/listinfo/ubuntu-security...