Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.4.19 and from 4.5.0 until 4.5.12, Mastodon's app/models/concerns/user/ldap_authenticable.rb mutates OpenSSL::SSL::SSLContext::DEFAULT_PARAMS when LDAP authentication uses LDAP_TLS_NO_VERIFY=true, disabling SSL and TLS certificate verification globally for requests made by puma web processes while sidekiq background jobs remain unaffected. This issue is fixed in versions 4.4.19 and 4.5.12.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 7
https://github.com/mastodon/mastodon/commit/2ccb6ef277e725d1932295690cf8ab9d3dc…
security-advisories@github.com
https://github.com/mastodon/mastodon/commit/5748d0b16ea09001e0933f76c7afe814e09…
security-advisories@github.com
https://github.com/mastodon/mastodon/commit/761c61b42590a2fd91442fc15a0a7583e48…
security-advisories@github.com
https://github.com/mastodon/mastodon/pull/39571
security-advisories@github.com
https://github.com/mastodon/mastodon/releases/tag/v4.4.19
security-advisories@github.com
https://github.com/mastodon/mastodon/releases/tag/v4.5.12
security-advisories@github.com
https://github.com/mastodon/mastodon/security/advisories/GHSA-3rhr-8phh-jm86
security-advisories@github.com