Title: DProxy Stack-Based Buffer-Overflow Vulnerability
Severity: HIGH
Description:
Dproxy is a small, freely available caching DNS server.
The application is prone to a stack-based buffer-overflow vulnerability because it fails to properly check boundaries on user-supplied data before copying it to an insufficiently sized buffer. The issue occurs prior to authentication.
Specifically, when the application receives UDP packets that are larger than 2048 bytes, a stack-based buffer will be overrun with attacker-supplied data.
An attacker could exploit this issue to cause denial-of-service conditions or to execute arbitrary machine code in the context of the affected service.
Affected Products:
- Matthew Pratt dproxy 0.1
- Matthew Pratt dproxy 0.2
- Matthew Pratt dproxy 0.3
- Matthew Pratt dproxy 0.4
- Matthew Pratt dproxy 0.5
References:
- Alexander Klink: [Full-disclosure] dproxy - arbitrary code execution through stack buffer overflo
- Cynops GmbH: Security Advisory AKLINK-SA-2007-001
- Matthew Pratt: dproxy Home Page
Juniper Networks provides this content via a wide variety of sources and production methods. If notified of errors or omissions in the content of this page, Juniper Networks, at its discretion, will modify or remove the page or leave the content as is, depending on various factors including but not limited to the reputation and authority of the party providing the notification. Please use the contact information displayed elsewhere on this page to report any errors or omissions regarding the content on this page.
