bugtraq - ssmtp insecure file creation

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Message-ID: <20040418191252.EEDB63CD358@mail1.sms.at>
Date: Sun, 18 Apr 2004 21:12 +0200
From: priestmaster@....at
To: bugtraq@...urityfocus.com
Cc: vuldb@...urityfocus.com
Subject: ssmtp insecure file creation

 Hi,

ssmtp 2.50.6 create a logfile /tmp/ssmtp.log. The data in this logfile
is user specified. It's possible to overwrite any file with
the permissons of the ssmtp program (normally root). The
vulnerable call is in log_event. log_event vulnerable call:

#ifdef LOGFILE
        if((fp = fopen("/tmp/ssmtp.log", "a")) != (FILE *)NULL) {
                (void)fprintf(fp, "%s\\n", buf);
                (void)fclose(fp);

I think, that all versions of ssmtp are vulnerable to this bug.

Have a nice day,

priest@...estmaster.org
http://www.priestmaster.org

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