Symfony Authentication Bypass

Impact

Symfony before 2.8.6 and 3.x before 3.0.6 allows remote attackers to bypass authentication by logging in with an empty password and valid username, which triggers an unauthenticated bind.

Affected packages

Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.

Original source description

References

• Security advisory nvd.nist.gov/vuln/detail/CVE-2016-2403
• Security advisory github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security-core/CVE-2016-2403.yaml
• Security advisory github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security/CVE-2016-2403.yaml
• Security advisory github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2016-2403.yaml
• Security advisory symfony.com/cve-2016-2403
• Security advisory web.archive.org/web/20210123224944/http://www.securityfocus.com/bid/96137
• Security advisory www.debian.org/security/2018/dsa-4262
• Security advisory symfony.com/blog/cve-2016-2403-unauthorized-access-on-a-misconfigured-ldap-server-when-using-an-empty-password