netscape bug

Perry E. Metzger perry at piermont.com
Sat Sep 23 11:31:54 PDT 1995



Tom Weinstein writes:
> In article <DFALB4.A5u at sgi.sgi.com>, "Perry E. Metzger" <perry at piermont.com> 
writes:
> 
> > I can tell you in general terms -- I don't write MIPS assembler
> > myself. However, I will point out to you that you use an ancient
> > Sendmail, and that it uses syslog(3) on user produced data, and that
> > syslog uses a static buffer. Trick sendmail into logging something
> > very big, and you can do what you like. The 8lgm people wrote a demo
> > for Sparc as a proof of concept.
> 
> Hmm, after having looked at the syslogd code, it looks like this
> particular bug has been fixed for at least several years.

I said syslog(3), not syslogd(8).

The bug is in the client, not the server. Yes, you suffer from it. Go
and check.

> However, there sure are a hell of a lot of fixed size buffers being
> alocated off the stack and some of them are being used in unsafe
> ways.

Perry






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