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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