CVE-2012-10053

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.

CVSS v4.0

9.3 CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS

1.21% chance of exploitation in the next 30 days, 66th percentile

Published

2025-08-08

Updated

2026-04-07

Proof-of-concept exploits (3)

• http://ghostinthelab.wordpress.com/2012/07/19/simplewebserver-2-2-rc2-remote-buffer-overf…
• https://www.exploit-db.com/exploits/19937
• https://www.exploit-db.com/exploits/20028

Metasploit modules (1)

• rapid7/metasploit-framework/blob/master/modules/exploits/windows/http/sws_connection_bof.…

References

• CVE Record
• NVD entry

Related

• CVE-2012-10052
• CVE-2012-10054
• CVE-2012-10051
• CVE-2012-10055
• CVE-2012-10050
• CVE-2012-10056