{"cve":"CVE-2023-32691","nvd":{"published":"2023-05-30T04:15:09.980","modified":"2026-06-17T05:59:24.010","status":"Modified","description":"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`.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","score":5.9},"cwes":["CWE-203"],"references":["https://github.com/ginuerzh/gost/blob/1c62376e0880e4094bd3731e06bd4f7842638f6a/auth.go#L46","https://github.com/ginuerzh/gost/security/advisories/GHSA-qjrq-hm79-49ww","https://github.com/ginuerzh/gost/blob/1c62376e0880e4094bd3731e06bd4f7842638f6a/auth.go#L46","https://github.com/ginuerzh/gost/security/advisories/GHSA-qjrq-hm79-49ww"],"products":["go_simple_tunnel_project:go_simple_tunnel"],"source":"nvd","synced_at":"2026-10-19T21:38:24.161619714+00:00"},"epss":{"cve":"CVE-2023-32691","score":0.00574,"percentile":0.47391,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-qjrq-hm79-49ww","url":"https://osv.dev/vulnerability/GHSA-qjrq-hm79-49ww","summary":"ginuerzh/gost vulnerable to Timing Attack","modified":"2026-09-10T03:50:08.350758125Z","packages":[{"ecosystem":"Go","name":"github.com/ginuerzh/gost","purl":"pkg:golang/github.com/ginuerzh/gost","ranges":["<=2.11.5"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}