• Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings
Denial of service in Ascend and 3com routers, which can be rebooted by sending a zero length TCP option.
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
Date Entry Created
19990607 Disclaimer: The entry creation date may reflect when the CVE-ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Proposed (19990714)
Votes (Legacy)
ACCEPT(5) Bishop, Cole, Northcutt, Ozancin, Shostack
MODIFY(2) Baker, Blake
NOOP(4) Armstrong, Frech, Landfield, Wall
REVIEWING(2) Christey, Levy
Comments (Legacy)
 Frech> possibly XF:ascend-kill
   I can't find a reference that lists both routers in the same reference.
 Wall> Comment:  There is a reference about the zero length TCP option in BugTraq on
   Feb 5, 1999
   and it mentions Cisco, but not directly Ascend or 3Com.  CIAC Advisory I-038
   vulnerabilities in Ascend, but does not mention TCP.  CIAC Advisory I-052
   3Com vulnerabilities, but not TCP.  Too confusing withour better references.
 Landfield> What are the references for this ? I cannot find a means to check it out.
 CHANGE> [Frech changed vote from REVIEWING to NOOP]
 Frech> Cannot reconcile to our database without further references.
 Blake> I'm with Andre.  I only remember and can find reference to the Ascend
   issue.  Do we have a refernce to the 3Coms?  If not, that should be
   removed from the description.
 Baker>	Misc Defensive Info	Misc Offensive Info	Misc Defensive Info	Misc Defensive Info
 CHANGE> [Armstrong changed vote from REVIEWING to NOOP]

Proposed (Legacy)
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