CVE-2017-14623: Access Restriction Bypass in go-ldap
Summary
CVE-2017-14623: Access Restriction Bypass in go-ldap. Affects github.com/go-ldap/ldap versions < 2.5.0. Fixed in 2.5.0. How to fix ↓
Also tracked for
- golang-github-go-ldap-ldap · Debian:11
The same CVE-2017-14623 is tracked separately for each ecosystem and vendor. Its fix information is the same; the package and affected versions differ.
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
The go-ldap package (ldap.v2) is a Go library that provides functionality for interacting with LDAP servers. It allows applications to perform operations such as authentication, searching, and modifying LDAP entries. However, versions up to 2.5.0 of this package are vulnerable to an access restriction bypass.
Vulnerability Detail
The vulnerability in go-ldap (ldap.v2) allows an attacker to login with an empty password. This issue arises when an application relies solely on the return error of the Bind function call to determine user authorization. In such cases, a nil return value is interpreted as successful authorization. Additionally, the vulnerability requires the LDAP server to allow unauthenticated bind. If these conditions are met, an attacker can bypass access restrictions and gain unauthorized access to the application.
How To Fix
Minimum fixed version
2.5.0
This is the first release that contains the fix.
go get github.com/go-ldap/ldap@v2.5.0Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If upgrading the go-ldap package is not immediately feasible, a possible workaround is to modify the application's authentication logic. Instead of relying solely on the return error of the Bind function, the application should implement additional checks to ensure proper authorization. This can include validating the user's credentials through other means or enforcing stricter authentication requirements.
Conclusion
The go-ldap package (ldap.v2) up to version 2.5.0 is vulnerable to an access restriction bypass, allowing attackers to login with an empty password. It is crucial to upgrade to version 2.5.0 or later to fix this vulnerability. If immediate upgrade is not possible, implementing additional authentication checks can serve as a temporary workaround. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for github.com/go-ldap/ldap →
FAQ
The vulnerability allows an attacker to bypass access restrictions and gain unauthorized access to an application using the go-ldap package.
Versions up to 2.5.0 of the go-ldap package are affected by this vulnerability.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability. Vulert monitors and alerts in real-time for open-source vulnerabilities without requiring access to the code or installation.
Yes, the CVSS score for this vulnerability is 8.1.
For more information and support on vulnerability remediation, you can contact info@devnack.com.
