What’s Vulnerable › Vulnerabilities

CVE-2009-20008: Green Dam 3.17 URL Processing Buffer Overflow

• Severity: high (CVSS 8.6 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-08-30 · updated 2026-10-01
• Weakness: CWE-121

Description

Green Dam Youth Escort version 3.17 is vulnerable to a stack-based buffer overflow when processing overly long URLs. The flaw resides in the URL filtering component, which fails to properly validate input length before copying user-supplied data into a fixed-size buffer. A remote attacker can exploit this vulnerability by enticing a user to visit a specially crafted webpage containing a long URL, resulting in arbitrary code execution.

Affected products

• Zhengzhou Jinhui Computer System Engineering Co. Ltd. ; Beijing Dazheng Human Language Technology Academy Green Dam Yout: 3.17

References

• https://en.wikipedia.org/wiki/Green_Dam_Youth_Escort
• https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/browser/greendam_url.rb
• https://web.archive.org/web/20110426190759/http://www.cse.umich.edu/~jhalderm/pub/gd/
• https://www.exploit-db.com/exploits/8938
• https://www.exploit-db.com/exploits/8969
• https://www.vulncheck.com/advisories/green-dam-url-processing-buffer-overflow

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