Authentication bypass in Go LDAP

1) Improper Authentication

EUVDB-ID: #VU69453

Risk: Medium

CVSSv4.0: 6.9 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2017-14623

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in processing authentication requests. A remote attacker can bypass authentication process and login with an empty password under certain conditions.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Go LDAP: 2.0 - 2.5.1

CPE2.3

• cpe:2.3:a:google:go_ldap:2.0:*:*:*:*:golang:*:*
• cpe:2.3:a:google:go_ldap:2.1:*:*:*:*:golang:*:*
• cpe:2.3:a:google:go_ldap:2.2:*:*:*:*:golang:*:*

External links

https://github.com/go-ldap/ldap/commit/95ede1266b237bf8e9aa5dce0b3250e51bfefe66
https://github.com/go-ldap/ldap/pull/126

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.