CVE-2025-31135 (GCVE-0-2025-31135)
Vulnerability from cvelistv5
Published
2025-04-01 22:03
Modified
2025-04-02 13:48
Severity ?
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CWE
  • CWE-20 - Improper Input Validation
Summary
Go-Guerrilla SMTP Daemon is a lightweight SMTP server written in Go. Prior to 1.6.7, when ProxyOn is enabled, the PROXY command will be accepted multiple times, with later invocations overriding earlier ones. The proxy protocol only supports one initial PROXY header; anything after that is considered part of the exchange between client and server, so the client is free to send further PROXY commands with whatever data it pleases. go-guerrilla will treat these as coming from the reverse proxy, allowing a client to spoof its IP address. This vulnerability is fixed in 1.6.7.
References
security-advisories@github.comhttps://github.com/phires/go-guerrilla/commit/7673947f2d5204a135d7ae0b7f80759e548abee6
security-advisories@github.comhttps://github.com/phires/go-guerrilla/security/advisories/GHSA-c2c3-pqw5-5p7c
Impacted products
Vendor Product Version
phires go-guerrilla Version: < 1.6.7
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