[NET-74] [net]Telnet option handlers subnegotiations does not handle 0xFF correctly

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Not A Problem
• Fix Version/s: 2.2
• Component/s: Telnet

Environment

Operating System: other
Platform: Other

• Bugzilla Id: 39071
• Assignee: Unassigned
• Reporter: Yuval Kashtan
• Created: 23/Mar/06 16:18
• Updated: 04/Jun/11 19:25
• Resolved: 11/Jul/10 23:03

Description

in accordance to RFC855: "Finally, if parameters in an option "subnegotiation"
include a byte with a value of 255, it is necessary to double this byte in
accordance the general TELNET rules."

I've actually encontered this while implementing WindowSize option handler, but
it seems that all the currently avilable handlers are vulnerable to this.