CVE-2025-32433

Summary

Erlang/OTP is a set of libraries for the Erlang programming language. Prior to versions OTP-27.3.3, OTP-26.2.5.11, and OTP-25.3.2.20, a SSH server may allow an attacker to perform unauthenticated remote code execution (RCE). By exploiting a flaw in SSH protocol message handling, a malicious actor could gain unauthorized access to affected systems and execute arbitrary commands without valid credentials. This issue is patched in versions OTP-27.3.3, OTP-26.2.5.11, and OTP-25.3.2.20. A temporary workaround involves disabling the SSH server or to prevent access via firewall rules.

Affected Software

Weaknesses

• CWE-306: CWE-306: Missing Authentication for Critical Function

ADP Enrichment

CVE Program Container

Additional References

• http://www.openwall.com/lists/oss-security/2025/04/16/2
• http://www.openwall.com/lists/oss-security/2025/04/18/1
• http://www.openwall.com/lists/oss-security/2025/04/18/2
• http://www.openwall.com/lists/oss-security/2025/04/18/6
• http://www.openwall.com/lists/oss-security/2025/04/19/1
• https://security.netapp.com/advisory/ntap-20250425-0001/
• https://lists.debian.org/debian-lts-announce/2025/04/msg00028.html

CISA ADP Vulnrichment

• SSVC:
• Exploitation: active
  • Automatable: yes
  • Technical Impact: total

Additional References

• https://github.com/ProDefense/CVE-2025-32433/blob/main/CVE-2025-32433.py
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-erlang-otp-ssh-xyZZy
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-32433

References

• https://github.com/erlang/otp/security/advisories/GHSA-37cp-fgq5-7wc2
• https://github.com/erlang/otp/commit/0fcd9c56524b28615e8ece65fc0c3f66ef6e4c12
• https://github.com/erlang/otp/commit/6eef04130afc8b0ccb63c9a0d8650209cf54892f
• https://github.com/erlang/otp/commit/b1924d37fd83c070055beb115d5d6a6a9490b891

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