CVE Details
Basic Information
| Title | vproxy is vulnerable to a divide by zero DoS attack |
|---|---|
| Type | cve |
| Published | 2025-07-30T19:57:46.454Z |
| Modified | 2025-07-30T20:23:36.826Z |
Product Information
| Vendor | 0x676e67 |
|---|---|
| Product | vproxy |
| Version | < 2.4.0 |
CVSS Information
| Base Score | 7.5 (HIGH) |
|---|---|
| Attack Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected Products
- 0x676e67 vproxy < 2.4.0
Additional Information
| CWE List | CWE-369 |
|---|---|
| Source | GitHub_M |
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.