Description
Erlang/OTP is a set of libraries for the Erlang programming language. In versions prior to OTP-27.3.4 (for OTP-27), OTP-26.2.5.12 (for OTP-26), and OTP-25.3.2.21 (for OTP-25), Erlang/OTP SSH fails to enforce strict KEX handshake hardening measures by allowing optional messages to be exchanged. This allows a Man-in-the-Middle attacker to inject these messages in a connection during the handshake. This issue has been patched in versions OTP-27.3.4 (for OTP-27), OTP-26.2.5.12 (for OTP-26), and OTP-25.3.2.21 (for OTP-25).
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None
Affected products
- erlang / OTP>= OTP 27.0, < OTP 27.3.4 – >= OTP 27.0, < OTP 27.3.4
- erlang / OTP>= OTP 26.2.1, < OTP 26.2.5.12 – >= OTP 26.2.1, < OTP 26.2.5.12
- erlang / OTP< OTP 25.3.2.21 – < OTP 25.3.2.21
References
- VENDOR_ADVISORYhttps://github.com/erlang/otp/security/advisories/GHSA-934x-xq38-hhqf
- PATCHhttps://github.com/erlang/otp/commit/e4b56a9f4a511aa9990dd86c16c61439c828df83
- PATCHhttps://github.com/erlang/otp/releases/tag/OTP-25.3.2.21
- PATCHhttps://github.com/erlang/otp/releases/tag/OTP-26.2.5.12
- PATCHhttps://github.com/erlang/otp/releases/tag/OTP-27.3.4