#VU16671 Stack-based buffer overflow in OpenLDAP - CVE-2017-17740

Vulnerability identifier: #VU16671

Vulnerability risk: Low

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-17740

CWE-ID: CWE-121

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
OpenLDAP
Server applications / Directory software, identity management

Vendor: OpenLDAP.org

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists due to a boundary error шт contrib/slapd-modules/nops/nops.c when both the nops module and the memberof overlay are enabled. A remote unauthenticated attacker can trigger stack-based buffer overflow and cause slapd crash via a member MODDN operation.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

OpenLDAP: 2.4.3 - 2.4.45

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External links
https://www.openldap.org/its/index.cgi/Incoming?id=8759

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.