By zerosday cve bot•June 9, 2025•
cves
CVE-2025-32433: Erlang Erlang/OTP SSH Server Missing Authentication for Critical Function Vulnerability (Pentest Lab Guide)
CVE-2025-32433: Technical Deep-Dive (Auto Refreshed)
Generated on 2026-03-24T15:43:57.616Z. This file is automatically regenerated every 30 minutes by the CVE AI enrichment job using web sources (NVD, MITRE, CISA KEV, GitHub).
Executive Technical 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.
- Context preserved from previous revision: 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. Notes: 这是一个每天同步Vulnerability-Wiki中docs-base中内容的项目
Technical Details
- CVE: CVE-2025-32433
- KEV date added: 2025-06-09
- KEV due date: 2025-06-30
- NVD published: 2025-04-17
- NVD modified: 2025-11-04
- MITRE modified: 2026-02-26
- CVSS base score: 10
- CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- CVSS exploitability score: 3.9
- CVSS impact score: 6
- Attack vector: Network
- Attack complexity: Low
- Privileges required: None
- User interaction: None
- Scope: Changed
- Confidentiality impact: High
- Integrity impact: High
- Availability impact: High
Versions and Products Impacted
- erlang / erlang/otp (versions: < 25.3.2.20)
- erlang / erlang/otp (versions: >= 26.0, < 26.2.5.11)
- erlang / erlang/otp (versions: >= 27.0, < 27.3.3)
- cisco / confd basic (versions: < 7.7.19.1)
- cisco / confd basic (versions: >= 8.0.18, < 8.1.16.2)
- cisco / confd basic (versions: >= 8.2, < 8.2.11.1)
- cisco / confd basic (versions: >= 8.3, < 8.3.8.1)
- cisco / confd basic (versions: >= 8.4, < 8.4.4.1)
- cisco / network services orchestrator (versions: < 5.7.19.1)
- cisco / network services orchestrator (versions: >= 5.8, < 6.1.16.2)
- cisco / network services orchestrator (versions: >= 6.2, < 6.2.11.1)
- cisco / network services orchestrator (versions: >= 6.3, < 6.3.8.1)
- cisco / network services orchestrator (versions: >= 6.4, < 6.4.1.1)
- cisco / network services orchestrator (versions: >= 6.4.2, < 6.4.4.1)
- cisco / cloud native broadband network gateway (versions: < 2025.03.1)
- cisco / inode manager
- cisco / smart phy (versions: < 25.2)
- cisco / ultra packet core (versions: < 2025.03)
- cisco / ultra services platform
- cisco / staros (versions: < 2025.03)
Weakness Classification
- CWE-306
Repositories for Lab Validation (Public Examples)
- J1ezds/Vulnerability-Wiki-page | stars: 8 | updated: 2026-03-24 | https://github.com/J1ezds/Vulnerability-Wiki-page
Notes: 这是一个每天同步Vulnerability-Wiki中docs-base中内容的项目 - zulloper/cve-poc | stars: 8 | updated: 2026-03-24 | https://github.com/zulloper/cve-poc
Notes: CVE POC repo 자동 수집기
People and Organizations Mentioned
- GitHub_M
- Erlang
- Erlang/OTP
- J1ezds
- zulloper
Practical Defensive Validation (Authorized Only)
- Use only isolated environments and systems you own or are explicitly authorized to test.
- Snapshot infrastructure before validation and preserve baseline logs (EDR, SIEM, OS, app).
- Use erlang / erlang/otp (versions: < 25.3.2.20) in isolated VM snapshots (vulnerable vs patched) and compare process tree telemetry before/after updates.
- Validate command-execution prevention policies (AppLocker/WDAC/EDR) with harmless test binaries only.
- Create SIEM detections for suspicious parent-child chains, encoded command usage, and abnormal service creation.
References
- NVD record: https://nvd.nist.gov/vuln/detail/CVE-2025-32433
- MITRE CVE record: https://www.cve.org/CVERecord?id=CVE-2025-32433
- CISA KEV Catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
- CISA KEV JSON feed: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json
- KEV notes: This vulnerability affects a common open-source project, third-party library, or a protocol used by different products. For more information, please see: https://github.com/erlang/otp/security/advisories/GHSA-37cp-fgq5-7wc2 ; https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-erlang-otp-ssh-xyZZy ; https://nvd.nist.gov/vuln/detail/CVE-2025-32433
- https://github.com/erlang/otp/commit/0fcd9c56524b28615e8ece65fc0c3f66ef6e4c12
- https://github.com/erlang/otp/commit/6eef04130afc8b0ccb63c9a0d8650209cf54892f
- https://github.com/erlang/otp/commit/b1924d37fd83c070055beb115d5d6a6a9490b891
- https://github.com/erlang/otp/security/advisories/GHSA-37cp-fgq5-7wc2
- 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://lists.debian.org/debian-lts-announce/2025/04/msg00028.html
- https://security.netapp.com/advisory/ntap-20250425-0001/
- 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
- Repository example: https://github.com/J1ezds/Vulnerability-Wiki-page
- Repository example: https://github.com/zulloper/cve-poc
This content is for defensive security training and authorized validation only.