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CVE-2017-17740

28
FAUCET Score

CVE-2017-17740 is a high-severity denial-of-service vulnerability affecting OpenLDAP through version 2.4.45, specifically when the nops module and memberof overlay are both enabled. This flaw, also impacting products like McAfee and Oracle, allows remote attackers to crash the slapd daemon by sending a crafted member MODDN operation. The vulnerability has a CVSS score of 7.5, indicating a high impact on availability with low attack complexity and no user interaction required. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.4.45CPE matchmatch criteria
cpe:2.3:a:openldap:openldap:*:*:*:*:*:*:*:*
15.0CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*
15.1CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
< 21.1.2CPE matchmatch criteria
cpe:2.3:a:oracle:blockchain_platform:*:*:*:*:*:*:*:*
< 6.5.1CPE matchmatch criteria
cpe:2.3:a:mcafee:policy_auditor:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
7.02%
Probability of exploitation in next 30 days
EPSS Percentile
93.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0702 is in the 89th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

mediatekpatch availablevia llm_extracted
Fixed in: 9.3.1, 9.2.3, 9.1.6
oraclepatch availablevia nvd_reference
View patch
redhatend of lifevia redhat_api
Product: Red Hat JBoss Enterprise Application Platform 5Fixed in: openldap

Vendor Advisories (2)

mediatekllm-mediatek-5bd731d14163992dHIGH

Third-Party Package Updates in Splunk Enterprise - October 2024

Oct 14, 2024
redhatCVE-2017-17740Moderate

openldap: contrib/slapd-modules/nops/nops.c attempts to free stack buffer allowing remote attackers to cause a denial of service

Oct 20, 2017

References

lists.opensuse.org / opensuse-security-announce/2019-09/msg00053.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2019-09/msg00058.html
Mailing ListThird Party Advisory
kc.mcafee.com / corporate/index
Third Party Advisory
oracle.com / security-alerts/cpuapr2022.html
PatchThird Party Advisory
openldap.org / its/index.cgi/Incoming
Issue TrackingVendor Advisory