{"id":"CVE-2023-32691","aliases":["GHSA-qjrq-hm79-49ww"],"url":"https://o3.security/vulnerability/CVE-2023-32691","summary":"ginuerzh/gost vulnerable to Timing Attack","details":"gost (GO Simple Tunnel) is a simple tunnel written in golang. Sensitive secrets such as passwords, token and API keys should be compared only using a constant-time comparison function. Untrusted input, sourced from a HTTP header, is compared directly with a secret. Since this comparison is not secure, an attacker can mount a side-channel timing attack to guess the password. As a workaround, this can be easily fixed using a constant time comparing function such as `crypto/subtle`'s `ConstantTimeCompare`. \n","published":"2023-05-30T03:06:06.080Z","modified":"2026-07-15T01:49:17.536604062Z","cvss":{"score":5.9,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"Go","name":"github.com/ginuerzh/gost","fixedVersion":null}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/ginuerzh/gost/blob/1c62376e0880e4094bd3731e06bd4f7842638f6a/auth.go#L46"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/32xxx/CVE-2023-32691.json"},{"type":"ADVISORY","url":"https://github.com/ginuerzh/gost/security/advisories/GHSA-qjrq-hm79-49ww"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-32691"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:49:17.536604062Z"}}