HOME VULNERABILITIESCVE-2017-17740

HIGH

CVE-2017-17740

CWE-119Published: December 18, 2017· Updated: Jun 17, 2026

7.5

CVSS v3.1

Official 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.

Technical Analysis

CVE-2017-17740 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Affected Vendors & Products

mcafee1 product(s)

policy auditor

openldap1 product(s)

openldap

openSUSE1 product(s)

leap

Oracle1 product(s)

blockchain platform

Source: NVD CPE · 5 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://www.oracle.com/security-alerts/cpuapr2022.html

PATCHhttps://www.oracle.com/security-alerts/cpuapr2022.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2019-09/msg00053.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2019-09/msg00058.html

ADVISORYhttp://www.openldap.org/its/index.cgi/Incoming?id=8759

ADVISORYhttps://kc.mcafee.com/corporate/index?page=content&id=SB10365

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2019-09/msg00053.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2019-09/msg00058.html

ADVISORYhttp://www.openldap.org/its/index.cgi/Incoming?id=8759

ADVISORYhttps://kc.mcafee.com/corporate/index?page=content&id=SB10365

All References (10)

→

http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00053.htmlMailing List · Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00058.htmlMailing List · Third Party Advisory

→

http://www.openldap.org/its/index.cgi/Incoming?id=8759Issue Tracking · Vendor Advisory

→

https://kc.mcafee.com/corporate/index?page=content&id=SB10365Third Party Advisory

→

https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch · Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00053.htmlMailing List · Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00058.htmlMailing List · Third Party Advisory

→

http://www.openldap.org/its/index.cgi/Incoming?id=8759Issue Tracking · Vendor Advisory

→

https://kc.mcafee.com/corporate/index?page=content&id=SB10365Third Party Advisory

→

https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch · Third Party Advisory

Quick Facts

CVE IDCVE-2017-17740

CVSS Score7.5 / 10

SeverityHIGH

WeaknessCWE-119

CISA KEVNo

Affected4 vendor(s)

PublishedDec 18, 2017

Related CVEs (CWE-119)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2017-17740 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.

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