What’s Vulnerable › Vulnerabilities

CVE-2012-10053: Simple Web Server Connection Header Buffer Overflow

• Severity: critical (CVSS 9.3 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-08-08 · updated 2026-06-16
• Weakness: CWE-121

Description

Simple Web Server 2.2 rc2 contains a stack-based buffer overflow vulnerability in its handling of the Connection HTTP header. When a remote attacker sends an overly long string in this header, the server uses vsprintf() without proper bounds checking, leading to a buffer overflow on the stack. This flaw allows remote attackers to execute arbitrary code with the privileges of the web server process. The vulnerability is triggered before authentication.

Affected products

• PMSoftware Simple Web Server: 2.2 rc2

References

• http://ghostinthelab.wordpress.com/2012/07/19/simplewebserver-2-2-rc2-remote-buffer-overflow-exploit/
• http://www.pmx.it/software/sws.asp
• https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/http/sws_connection_bof.rb
• https://www.exploit-db.com/exploits/19937
• https://www.exploit-db.com/exploits/20028
• https://www.vulncheck.com/advisories/simple-web-server-connection-header-buffer-overflow
• https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/http/sws_connection_bof.rb
• https://www.exploit-db.com/exploits/19937
• https://www.exploit-db.com/exploits/20028

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