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Vulnerability record · CVE-2017-17740 · published 18 December 2017

CVE-2017-17740: Openldap memory buffer overflow vulnerability

Openldap · Openldap

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.

7.5 CVSS 3.1 High EPSS 7.0% · top 6.0% CWE-119 · Memory buffer overflow
7.5CVSS 3.1 base score, v2 5.0
7.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
10References
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00053.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00058.html Mailing ListThird Party Advisory
http://www.openldap.org/its/index.cgi/Incoming?id=8759 Issue TrackingVendor Advisory
https://kc.mcafee.com/corporate/index?page=content&id=SB10365 Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.html PatchThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00053.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00058.html Mailing ListThird Party Advisory
http://www.openldap.org/its/index.cgi/Incoming?id=8759 Issue TrackingVendor Advisory
https://kc.mcafee.com/corporate/index?page=content&id=SB10365 Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.html PatchThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2017-17740), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.