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Vulnerability in viewsrc.cgi
From: joetesta () hushmail com
Date: Wed, 23 May 2001 12:45:37 -0800 (PDT)
----- Begin Hush Signed Message from joetesta () hushmail com ----- Vulnerability in viewsrc.cgi Overview viewsrc.cgi v2.0 is a source-code viewing CGI script available from http://www.mimanet.com/scripts. A vulnerability exists which allows a remote user to view any file on the server. Details The following URL demonstrates the problem: http://localhost/cgi-bin/viewsrc.cgi? loc=../[any file outside restricted directory] Solution Apply the following patch to viewsrc.cgi: 53a54,56
$FORM{'loc'} =~ s/\.\.//g; $FORM{'loc'} =~ s/\\//g; $FORM{'loc'} =~ s/\///g;
65c68 < open (INHTML, "$predo") or die &err_loc; ---
open (INHTML, "<$predo") or die &err_loc;
This patch removes any '..', '/', or '\'s present in the $FORM{'loc'} variable. It also makes the open() command safer by using the '<' read-only specifier. Vendor Status MIMAnet was contacted via <webmaster () mimanet com> on Tuesday, May 1, 2001. Roberto R. Morelli <morelli () altair7 com> quickly replied and stated that the problem was verified and an official fix would be released. Twenty two days have passed, and nothing has been done. - Joe Testa e-mail: joetesta () hushmail com web page: http://hogs.rit.edu/~joet AIM: LordSpankatron ----- Begin Hush Signature v1.3 ----- DOrv4aKzsw/oqP1AX/hJLu6OSDg66o3htrFq10+HrfqZKQSij4O7yk37xInPmtf5jNmw G8UkEk5iwQVbI51+zG02T5KOB7YIdPTf6doAc2Inrxlhle1lkFX/56v3rVdb5uAkQk2F /4a6mDilaqcY+lwYkjyT1Yk0Wmz1dcwTF8Bp/wF6y7JaQ1F2EB4q/tgnSK8Q82T+ZlN7 csLmfX2BSub2gzldV8jI7swh4Qfog+V0ZFx0SB4Q5MiRdcQgcLxc2xf+ho2uNzd/sq93 QTW76yFXLiYlJOTmiLP8cgrB5Px9eu4Qstcf/JIiTPbosZSZq10H4svE/4NbLw5cvVoW e3OwbvzqZZVmQKzuW+xUgd9PJe7vObdo8Z4+cyLQNB1LOp15Fj0I0XHLk9TrDCcGv2cv FKu6LWn6Fmm0QbumoHXWZnOUP9pAA6MU2xv+EB2JD0hfweLYSNjQ1V4p/qEmYxrq3fFN Ldl5hjo+WxcV1l8vj15oG/KDqJA5m1PDA09sFVTKcfEt ----- End Hush Signature v1.3 ----- This message has been signed with a Hush Digital Signature. To verify the signature, please go to www.hush.com/tools Free, encrypted, secure Web-based email at www.hushmail.com
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