{"id":"CVE-2025-54870","state":"PUBLISHED","title":"VTun-ng's failure to initialize encryption modules may cause reversion to plaintext","description":"VTun-ng is a Virtual Tunnel over TCP/IP network. In versions 3.0.17 and below, failure to initialize encryption modules might cause reversion to plaintext due to insufficient error handling. The bug was first introduced in VTun-ng version 3.0.12. This is fixed in version 3.0.18. To workaround this issue, avoid blowfish-256.","publishedAt":"2025-08-05T00:02:38.457Z","updatedAt":"2025-08-05T14:56:26.901Z","severity":{"score":8.7,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["leakingmemory vtun-ng"],"affected":[{"vendor":"leakingmemory","product":"vtun-ng","versions":[{"version":">= 3.0.12, < 3.0.18","status":"affected"}]}],"references":["https://github.com/leakingmemory/vtun-ng/security/advisories/GHSA-m3jc-27c6-2wrf","https://github.com/leakingmemory/vtun-ng/commit/8c63982b6c487c52db1d56ab94c266f0bc857140"],"weaknesses":["CWE-636"],"ingestedAt":"2026-10-29T20:09:31.862Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/54xxx/CVE-2025-54870.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2025-54870","state":"PUBLISHED","datePublished":"2025-08-05T00:02:38.457Z","dateUpdated":"2025-08-05T14:56:26.901Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2025-07-31T17:23:33.473Z"},"containers":{"cna":{"title":"VTun-ng's failure to initialize encryption modules may cause reversion to plaintext","descriptions":[{"lang":"en","value":"VTun-ng is a Virtual Tunnel over TCP/IP network. In versions 3.0.17 and below, failure to initialize encryption modules might cause reversion to plaintext due to insufficient error handling. The bug was first introduced in VTun-ng version 3.0.12. This is fixed in version 3.0.18. To workaround this issue, avoid blowfish-256."}],"affected":[{"vendor":"leakingmemory","product":"vtun-ng","versions":[{"version":">= 3.0.12, < 3.0.18","status":"affected"}]}],"references":[{"url":"https://github.com/leakingmemory/vtun-ng/security/advisories/GHSA-m3jc-27c6-2wrf","name":"https://github.com/leakingmemory/vtun-ng/security/advisories/GHSA-m3jc-27c6-2wrf","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/leakingmemory/vtun-ng/commit/8c63982b6c487c52db1d56ab94c266f0bc857140","name":"https://github.com/leakingmemory/vtun-ng/commit/8c63982b6c487c52db1d56ab94c266f0bc857140","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.7,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-636","lang":"en","description":"CWE-636: Not Failing Securely ('Failing Open')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2025-08-05T00:02:38.457Z"},"source":{"advisory":"GHSA-m3jc-27c6-2wrf","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-08-05T14:56:18.199907Z","id":"CVE-2025-54870","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-08-05T14:56:26.901Z"}}]}}}