Description
FirstClass Internet Services server 5.770, and other versions before 6.1, allows remote attackers to cause a denial of service by sending an email with a long To: mail header.
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Centrinity FirstClass 5.77 - Intranet Server Long Header Denial of Service EDB-20052 · dos · Jun 27, 2000 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- firstclass-large-bcc-dos(4843) vdb-entry
- 1421 vdb-entry
- 5718 vdb-entry
- 20000627 DoS in FirstClass Internet Services 5.770 mailing-list