Description
wrshdsp.exe in Denicomp Winsock RSHD/NT 2.21.00 and earlier allows remote attackers to cause a denial of service (CPU consumption) via (1) in 2.20.00 and earlier, an invalid port number such as a negative number, which causes a connection attempt to that port and all ports below 1024, and (2) in 2.21.00, a port number of 1024.
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 2
- Denicomp Winsock RSHD/NT Standard Error 2.20.00 - Denial of Service EDB-21174 · dos · Dec 10, 2001 · verified
- Denicomp Winsock RSHD/NT Standard Error 2.21.00 - Denial of Service EDB-21175 · dos · Dec 10, 2001 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- 20011208 Winsock RSHD/NT 2.20.00 CPU overusage when invalid data is send mailing-list
- 3659 vdb-entry
- 20011213 WRSHDNT 2.21.00 CPU overusage mailing-list
- winsock-rshdnt-error-dos(7694) vdb-entry
- http://www.denicomp.com/rshdnt.htm