Description
Zyxel Prestige 681 and 1600 SDSL Routers allow remote attackers to cause a denial of service via malformed packets with (1) an IP length less than actual packet size, or (2) fragmented packets whose size exceeds 64 kilobytes after reassembly.
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
- ZYXEL Prestige 681 SDSL Router - IP Fragment Reassembly EDB-21186 · remote · Dec 18, 2001 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- 20011218 Re: Zyxel Prestige 681 and 1600 (possibly other?) remote DoS mailing-list
- prestige-dsl-packet-length-dos(7704) vdb-entry
- 20011214 Zyxel Prestige 681 and 1600 (possibly other?) remote DoS mailing-list
- 3695 vdb-entry