CVE-2025-54581 | THREATINT

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.

PUBLISHED Reserved 2025-07-25 | Published 2025-07-30 | Updated 2025-07-30 | Assigner GitHub_M

HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

CWE-369: Divide By Zero

Product status

< 2.4.0

affected

References

github.com/...vproxy/security/advisories/GHSA-7h24-c332-p48c

github.com/...ommit/aa1bf64c5e7f1c471395f9f29175ffc1b16a1079

github.com/0x676e67/vproxy/releases/tag/v2.4.0

cve.org (CVE-2025-54581)

nvd.nist.gov (CVE-2025-54581)

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