Red Hat Directory Server and Fedora Directory Server regular expression buffer overflow

rhds-fedora-expression-bo (42332) The risk level is classified as HighHigh Risk

Description:

Multiple vendors, including the Red Hat Directory Server and Fedora Directory Server, are vulnerable to a buffer overflow, caused by improper bounds checking by the regular expression handler. By sending a specially-crafted LDAP search request containing an overly long regular expression, a remote attacker from within the local network could overflow a buffer and execute arbitrary code on the system or cause the server to crash.

*CVSS:

Base Score: 5.8
  Access Vector: Adjacent Network
  Access Complexity: Low
  Authentication: None
  Confidentiality Impact: Partial
  Integrity Impact: Partial
  Availability Impact: Partial
 
Temporal Score: 4.3
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Gain Access

Remedy:

Refer to RHSA-2008:0269-2 for patch, upgrade or suggested workaround information. See References.

References:

  • Red Hat Bugzilla Bug 444712: CVE-2008-1677 Directory Server: insufficient buffer size for search patterns.
  • RHSA-2008:0269-2: Critical: redhat-ds-base security update.
  • BID-29126: Red Hat Directory Server LDAP Query Patterns Buffer Overflow Vulnerability
  • CVE-2008-1677: Buffer overflow in the regular expression handler in Red Hat Directory Server 8.0 and 7.1 before SP6 allows remote attackers to cause a denial of service (slapd crash) and possibly execute arbitrary code via a crafted LDAP query that triggers the overflow during translation to a regular expression.
  • RHSA-2008-0268: Critical: Red Hat Directory Server 7.1 Service Pack 6 security update
  • RHSA-2008-0269: Critical: redhat-ds-base security update
  • SA30181: Red Hat Directory Server Regular Expression Handler Buffer Overflow
  • SA30185: Fedora Directory Server Regular Expression Handler Buffer Overflow
  • SECTRACK ID: 1020001: Red Hat Directory Server Buffer Overflow in Regex Handler Lets Remote Users Execute Arbitrary Code

Platforms Affected:

  • RedHat Directory Server 7.1
  • RedHat Directory Server 8
  • RedHat Enterprise Linux 4 WS
  • RedHat Fedora Directory Server 1.1

Reported:

May 09, 2008

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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