{"id":"CVE-2025-54581","aliases":["GHSA-7h24-c332-p48c"],"url":"https://o3.security/vulnerability/CVE-2025-54581","summary":"vproxy is vulnerable to a divide by zero DoS attack","details":"vproxy is an HTTP/HTTPS/SOCKS5 proxy server. In versions 2.3.3 and below, untrusted data is extracted from the user-controlled HTTP Proxy-Authorization header and passed to Extension::try_from and flows into parse_ttl_extension where it is parsed as a TTL value. If an attacker supplies a TTL of zero (e.g. by using a username such as 'configuredUser-ttl-0'), the modulo operation 'timestamp % ttl' will cause a division by zero panic, causing the server to crash causing a denial-of-service. This is fixed in version 2.4.0.","published":"2025-07-30T19:57:46.454Z","modified":"2026-07-15T01:49:21.035066065Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"crates.io","name":"vproxy","fixedVersion":"2.4.0"}],"fix":{"url":"https://github.com/0x676e67/vproxy/commit/aa1bf64c5e7f1c471395f9f29175ffc1b16a1079","label":"0x676e67/vproxy@aa1bf64"},"references":[{"type":"WEB","url":"https://github.com/0x676e67/vproxy/releases/tag/v2.4.0"},{"type":"ADVISORY","url":"https://github.com/0x676e67/vproxy/security/advisories/GHSA-7h24-c332-p48c"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/54xxx/CVE-2025-54581.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-54581"},{"type":"FIX","url":"https://github.com/0x676e67/vproxy/commit/aa1bf64c5e7f1c471395f9f29175ffc1b16a1079"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:49:21.035066065Z"}}