Ubuntu 8.04 LTS / 9.10 / 10.04 LTS / 10.10 : openldap, openldap2.3 vulnerabilities (USN-1100-1)

Medium Nessus Plugin ID 53257


The remote Ubuntu host is missing one or more security-related patches.


It was discovered that OpenLDAP did not properly check forwarded authentication failures when using a slave server and chain overlay.
If OpenLDAP were configured in this manner, an attacker could bypass authentication checks by sending an invalid password to a slave server. (CVE-2011-1024)

It was discovered that OpenLDAP did not properly perform authentication checks to the rootdn when using the back-ndb backend.
An attacker could exploit this to access the directory by sending an arbitrary password. Ubuntu does not ship OpenLDAP with back-ndb support by default. This issue did not affect Ubuntu 8.04 LTS.

It was discovered that OpenLDAP did not properly validate modrdn requests. An unauthenticated remote user could use this to cause a denial of service via application crash. (CVE-2011-1081).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


Update the affected packages.

Plugin Details

Severity: Medium

ID: 53257

File Name: ubuntu_USN-1100-1.nasl

Version: $Revision: 1.9 $

Type: local

Agent: unix

Published: 2011/04/01

Modified: 2016/05/27

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 6.8

Temporal Score: 5

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:ldap-utils, p-cpe:/a:canonical:ubuntu_linux:libldap-2.4-2, p-cpe:/a:canonical:ubuntu_linux:libldap-2.4-2-dbg, p-cpe:/a:canonical:ubuntu_linux:libldap2-dev, p-cpe:/a:canonical:ubuntu_linux:slapd, p-cpe:/a:canonical:ubuntu_linux:slapd-dbg, cpe:/o:canonical:ubuntu_linux:10.04:-:lts, cpe:/o:canonical:ubuntu_linux:10.10, cpe:/o:canonical:ubuntu_linux:8.04:-:lts, cpe:/o:canonical:ubuntu_linux:9.10

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2011/03/31

Reference Information

CVE: CVE-2011-1024, CVE-2011-1025, CVE-2011-1081

BID: 46363, 46831

OSVDB: 72528, 72529, 72530

USN: 1100-1