Vulnerability Monitor

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CVE-2017-17740

contrib/slapd-modules/nops/nops.c in OpenLDAP through 2.4.45, when both the nops module and the memberof overlay are enabled, attempts to free a buffer that was allocated on the stack, which allows remote attackers to cause a denial of service (slapd crash) via a member MODDN operation.

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.5, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 4 products from openldap, from opensuse, from oracle and 1 other, organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2017, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2017-12-18T06:29:00.397

Last Modified

2026-06-17T01:11:34.287

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

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

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-119

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	openldap	openldap	≤ 2.4.45	Yes
Operating System	opensuse	leap	15.0	Yes
Operating System	opensuse	leap	15.1	Yes
Application	oracle	blockchain_platform	< 21.1.2	Yes
Application	mcafee	policy_auditor	< 6.5.1	Yes

References

http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00053.html Mailing List, Third Party Advisory ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00058.html Mailing List, Third Party Advisory ([email protected])
http://www.openldap.org/its/index.cgi/Incoming?id=8759 Issue Tracking, Vendor Advisory ([email protected])
https://kc.mcafee.com/corporate/index?page=content&id=SB10365 Third Party Advisory ([email protected])
https://www.oracle.com/security-alerts/cpuapr2022.html Patch, Third Party Advisory ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00053.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00058.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openldap.org/its/index.cgi/Incoming?id=8759 Issue Tracking, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://kc.mcafee.com/corporate/index?page=content&id=SB10365 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.oracle.com/security-alerts/cpuapr2022.html Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For openldap's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.