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OpenLDAP < 2.4.27 DoS Vulnerability

Information

Severity

Severity

Medium

Family

Family

Denial of Service

CVSSv2 Base

CVSSv2 Base

4.0

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:L/Au:S/C:N/I:N/A:P

Solution Type

Solution Type

Vendor Patch

Created

Created

1 year ago

Modified

Modified

1 year ago

Summary

OpenLDAP is prone to a denial of service (DoS) vulnerability.

Insight

Insight

Off-by-one error in the UTF8StringNormalize function allows remote attackers to cause a denial of service (slapd crash) via a zero-length string that triggers a heap-based buffer overflow, as demonstrated using an empty postalAddressAttribute value in an LDIF entry.

Affected Software

Affected Software

OpenLDAP prior to version 2.4.27.

Detection Method

Detection Method

Checks if a vulnerable version is present on the target host.

Solution

Solution

Update to version 2.4.27 or later.

Common Vulnerabilities and Exposures (CVE)