CVE-2012-10055

Summary

ComSndFTP FTP Server version 1.3.7 Beta contains a format string vulnerability in its handling of the USER command. By sending a specially crafted username containing format specifiers, a remote attacker can overwrite a hardcoded function pointer in memory (specifically WSACleanup from Ws2_32.dll). This allows the attacker to redirect execution flow and bypass DEP protections using a ROP chain, ultimately leading to arbitrary code execution. The vulnerability is exploitable without authentication and affects default configurations.

Affected Software

Weaknesses

• CWE-134: CWE-134 Use of Externally-Controlled Format String

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: yes
  • Technical Impact: total

Additional References

• https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ftp/comsnd_ftpd_fmtstr.rb
• https://www.exploit-db.com/exploits/19024
• https://www.exploit-db.com/exploits/19177

References

• https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ftp/comsnd_ftpd_fmtstr.rb
• https://www.exploit-db.com/exploits/19024
• https://www.exploit-db.com/exploits/19177
• https://web.archive.org/web/20120317214524/http://ftp.comsnd.com/
• https://www.vulncheck.com/advisories/comsndftp-user-format-string-rce

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