CVE-2025-34451
Stack-Based Buffer Overflow in proxychains-ng Causes Crashes
Publication date: 2025-12-18
Last updated on: 2025-12-18
Assigner: VulnCheck
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| rofl0r | proxychains-ng | 4.17 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-121 | A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a stack-based buffer overflow in the proxy_from_string() function of rofl0r/proxychains-ng versions up to 4.17 and prior to commit cc005b7. It occurs when the application parses proxy configuration entries with overly long username or password fields, causing it to write beyond the bounds of fixed-size stack buffers. This can lead to memory corruption or crashes.
How can this vulnerability impact me? :
The vulnerability can cause denial of service by crashing the application due to memory corruption. Under certain conditions, it might also be exploited further depending on the execution environment and applied mitigations, potentially leading to more severe security issues.