High severity7.5NVD Advisory· Published Jul 30, 2025· Updated Apr 15, 2026
CVE-2025-54581
CVE-2025-54581
Description
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
vproxycrates.io | < 2.4.0 | 2.4.0 |
Affected products
1Patches
Vulnerability mechanics
References
5- github.com/advisories/GHSA-7h24-c332-p48cghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2025-54581ghsaADVISORY
- github.com/0x676e67/vproxy/commit/aa1bf64c5e7f1c471395f9f29175ffc1b16a1079nvdWEB
- github.com/0x676e67/vproxy/releases/tag/v2.4.0nvdWEB
- github.com/0x676e67/vproxy/security/advisories/GHSA-7h24-c332-p48cnvdWEB
News mentions
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