[TUHS] Craig Partridge on BBN vs BSD TCP/IP

[Paul Ruizendaal via TUHS]

> On 21 Jan 2026, at 10:41, Erik E. Fair <fair-tuhs at netbsd.org> wrote:
> 
> Two very commonly used (at the time) Unix network applications which use TCP urgent (out of band): telnet(1) and rlogin(1). There is mirrored code in their respective daemon counterparts, too.
> 
> The NetBSD source code for telnetd(8) contains a couple of mitigations for the off-by-one urgent data bug, some marked by /* XXX */ comments, in state.c, telnetd.c, and utility.c
> 
> See https://cvsweb.netbsd.org/bsdweb.cgi/src/libexec/telnetd/
> 
> 	Erik

Ah, did not know that. Thanks!