CVE-2025-54581

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/0x676e67/vproxy/commit/aa1bf64c5e7f1c471395f9f29175ffc1b16a1079
https://github.com/0x676e67/vproxy/releases/tag/v2.4.0
https://github.com/0x676e67/vproxy/security/advisories/GHSA-7h24-c332-p48c

Configurations

No configuration.

History

31 Jul 2025, 18:42

Type	Values Removed	Values Added
Summary		(es) vproxy es un servidor proxy HTTP/HTTPS/SOCKS5. En las versiones 2.3.3 y anteriores, los datos no confiables se extraen del encabezado HTTP Proxy-Authorization, controlado por el usuario, se pasan a Extension::try_from y fluyen a parse_ttl_extension, donde se analizan como un valor TTL. Si un atacante proporciona un valor TTL de cero (por ejemplo, usando un nombre de usuario como 'configuredUser-ttl-0'), la operación de módulo 'timestamp % ttl' provocará un pánico por división por cero, lo que provocará el bloqueo del servidor y una denegación de servicio. Esto se solucionó en la versión 2.4.0.

30 Jul 2025, 20:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-07-30 20:15

Updated : 2025-07-31 18:42

NVD link : CVE-2025-54581

Mitre link : CVE-2025-54581

CVE.ORG link : CVE-2025-54581

JSON object : View

Products Affected

No product.

CWE

CWE-369

Divide By Zero

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