Date: Mon, 23 Feb 2004 15:16:16 -0500 From: John Baldwin <jhb@FreeBSD.org> To: current@FreeBSD.org Cc: Colin Percival <colin.percival@wadham.ox.ac.uk> Subject: Re: What to do about nologin(8)? Message-ID: <200402231516.16586.jhb@FreeBSD.org> In-Reply-To: <1077566329.24177.3.camel@herring.nlsystems.com> References: <6.0.1.1.1.20040223171828.03de8b30@imap.sfu.ca> <1077566329.24177.3.camel@herring.nlsystems.com>
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On Monday 23 February 2004 02:58 pm, Doug Rabson wrote: > On Mon, 2004-02-23 at 17:45, Colin Percival wrote: > > As anyone who reads cvs-all (or Mark Johnston's wonderful > > summaries thereof) will know, I recently added logging into > > nologin(8): Instead of simply printing an error message, it > > now (via syslog) records the refused login attempt. > > For security reasons, nologin(8) must be statically linked; > > as a result, adding logging has increased the binary size by > > slightly over 100K (on i386). For historical reasons (which > > is to say, "nobody seems to know why"), nologin is located in > > /sbin, which means that this has a non-trivial effect upon > > the space used on the root partition. Some people are unhappy > > about this. > > I can see a number of possible options; I'd like to hear > > opinions on which would be the best. > > How about: > > 7: Use 'system("logger ...") to log the failed login? Wouldn't that be subject to the same LD_LIBRARY_PATH concerns since logger is dynamically linked and you could trojan it's libc? -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" = http://www.FreeBSD.org
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