CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS
Percentile
91.8%
The IBM SecureWay Directory contains vulnerabilities that may allow denial-of-service attacks, unauthorized privileged access, or both. These vulnerabilities were revealed using the PROTOS LDAPv3 test suite and are documented in CERT Advisory CA-2001-18. If your site uses this product, the CERT/CC encourages you to follow the advice provided below.
The IBM SecureWay Directory server contains one or more buffer overflow vulnerabilities in the code that processes LDAP requests. These vulnerabilities were discovered independently by IBM using the PROTOS LDAPv3 test suite.
These vulnerabilities allow a remote attacker to crash affected SecureWay Directory servers, resulting in a denial-of-service condition. It is not known at this time whether these vulnerabilities will allow a remote attacker to execute arbitrary code. These vulnerabilities exist on the Solaris and Windows 2000 platforms but are not present under Windows NT, AIX, and AIX with SSL.
Apply a patch from your vendor
Please consult the vendor section for vendor-specific information on addressing this vulnerability.
Block access to directory services at network perimeter
As a temporary measure, it is possible to limit the scope of these vulnerabilities by blocking access to directory services at the network perimeter. Please note that this workaround does not protect vulnerable products from internal attacks.
ldap 389/tcp # Lightweight Directory Access Protocol
ldap 389/udp # Lightweight Directory Access Protocol
ldaps 636/tcp # ldap protocol over TLS/SSL (was sldap)
ldaps 636/udp # ldap protocol over TLS/SSL (was sldap)
505564
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Notified: June 01, 2001 Updated: May 20, 2002
Affected
IBM and Tivoli are currently investigating the details of the vulnerabilities in the various versions of the SecureWay product family.
Fixes are being implemented as these details become known.
Fixes will be posted to the download sites (IBM or Tivoli) for the affected platform. See <http://www-1.ibm.com/support> under “Server Downloads” or “Software Downloads” for links to the fix distribution sites.
The vendor has not provided us with any further information regarding this vulnerability.
IBM has provided the following details regarding these vulnerabilities:
Platform Failed Test Cases(index#/category) Failure Symptoms
Solaris #136/E0 encoding exception-invalid Server crash encodings for L field of BER encoding.
Solaris #6119/O7 application exception Server crash -large number of continuous attributes offered to attribute field.
Windows 2000 #452/E0 encoding exception Server crash -invalid encodings for L field of BER encoding.
Windows 2000 #5554/O4 application exception- Server crash large number of continuous initial substring offered to substring filter.
If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23505564 Feedback>).
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The CERT Coordination Center thanks the Oulu University Secure Programming Group for reporting these vulnerabilities to us, for their detailed technical analyses, and for their assistance in preparing this document.
This document was written by Jeffrey P. Lanza.
CVE IDs: | CVE-2001-1309 |
---|---|
CERT Advisory: | CA-2001-18 Severity Metric: |