CVE-2017-17740 [High] | Memory Corruption in Openldap

CVE-2017-17740 is rated Moderate Risk (61.3/100): CVSS High severity, with high exploitation likelihood (EPSS 6.14%, 91th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-05-27	6.64%	6.14%	-0.51%
2	2026-05-22	6.14%	6.64%	+0.51%
3	2026-04-20	—	6.14%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-05-27

6.64%

6.14%

-0.51%

2026-05-22

6.14%

6.64%

+0.51%

2026-04-20

—

6.14%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.5	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	3.9	3.6	[email protected]
5.0	2.0	MEDIUM	`AV:N/AC:L/Au:N/C:N/I:N/A:P` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:L) Exploitation conditions are straightforward and predictable. Authentication (AU:N) No authentication is required. Confidentiality impact (C:N) No confidentiality impact. Integrity impact (I:N) No integrity impact. Availability impact (A:P) Partial availability impact.	10.0	2.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

7.5

3.1

HIGH

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

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

3.9

3.6

[email protected]

5.0

2.0

MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:L): Exploitation conditions are straightforward and predictable.
Authentication (AU:N): No authentication is required.
Confidentiality impact (C:N): No confidentiality impact.
Integrity impact (I:N): No integrity impact.
Availability impact (A:P): Partial availability impact.

10.0

2.9

[email protected]

OS Trackers for CVE-2017-17740

vendor	priority	summary	link
`alpine`	—	CVE-2017-17740: 1 source package rows (openldap); 10 state rows across 10 repos (3.10-main, 3.11-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 10, open 0.	https://security.alpinelinux.org/vuln/CVE-2017-17740
`debian`	unimportant	CVE-2017-17740 unimportant priority: Debian including 1 source packages (openldap), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 5.	https://security-tracker.debian.org/tracker/CVE-2017-17740
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2017-17740
`suse`	medium	CVE-2017-17740 severity moderate: SUSE including 495 source package names (0.1.0:libldap-2_4-2-2.4.46-9.19.2, 0.1.0:libldap-data-2.4.46-9.19.2, …), 680 product×package rows across 160 product lines (Container bci/dotnet-aspnet, Container bci/dotnet-runtime, … (160 product lines)): Fixed 510, Known Affected 157, Known Not Affected 13.	https://www.suse.com/security/cve/CVE-2017-17740/
`ubuntu`	low	CVE-2017-17740 low priority: Ubuntu including 1 source packages (openldap), 5 status rows across 5 suites (artful, trusty, upstream, xenial, zesty): not-affected 4, needs-triage 1.	https://ubuntu.com/security/CVE-2017-17740

Affected software / configurations for CVE-2017-17740

Vendor	Product	Version	Raw CPE
openldap	openldap	<= 2.4.45	cpe:2.3:a:openldap:openldap::::::::
opensuse	leap	15.0	cpe:2.3:o:opensuse:leap:15.0:::::::*
opensuse	leap	15.1	cpe:2.3:o:opensuse:leap:15.1:::::::*
oracle	blockchain_platform	< 21.1.2	cpe:2.3:a:oracle:blockchain_platform::::::::
mcafee	policy_auditor	< 6.5.1	cpe:2.3:a:mcafee:policy_auditor::::::::

References for CVE-2017-17740

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

URL

CVE-2017-17740

Exploit prediction scoring system (EPSS) score for CVE-2017-17740

Common vulnerability scoring system (CVSS) metrics for CVE-2017-17740

Weakness enumeration for CVE-2017-17740

OS Trackers for CVE-2017-17740

Affected software / configurations for CVE-2017-17740

References for CVE-2017-17740