Cisco advised us of a new catastrophic bug CSCeb56052 within the new IOS.
-----Original Message----- From: Arnold, Jamie [mailto:[EMAIL PROTECTED] Sent: Thursday, July 17, 2003 1:54 PM To: [EMAIL PROTECTED] Subject: RE: a really big bug [7:72463] Just got a call from our Cisco vendor...he said he's getting calls from some major clients that have routers that are affected. -----Original Message----- From: Priscilla Oppenheimer [mailto:[EMAIL PROTECTED] Sent: Thursday, July 17, 2003 12:34 PM To: [EMAIL PROTECTED] Subject: RE: a really big bug [7:72463] Oscar wrote: > > Cisco Security Advisory: Cisco IOS Interface Blocked by IPv4 Packet > > lots and lots of IOS versions are affected > > http://www.cisco.com/warp/public/707/cisco-sa-20030717-blocked.shtml > > Thanks for the link. It's scary. Of course, with the proper ACLs, a router wouldn't be affected, but probably lots of routers don't have "the proper ACLs." Anyone know the details? The advisory just says this: "A rare, specially crafted sequence of IPv4 packets which is handled by the processor on a Cisco IOS device may force the device to incorrectly flag the input queue on an interface as full, which will cause the router to stop processing inbound traffic on that interface. This can cause routing protocols to drop due to dead timers." I think Cisco was right not to publish the details about these "rare, specially crafted" packets, but does anyone have the details? Maybe if you can get to the bugtracker, the details are in there. Thanks Priscilla Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=72509&t=72463 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
