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gwcc insecure temporary file creation
From: ZATAZ Audits <exploits () zataz net>
Date: Fri, 16 Sep 2005 15:48:14 +0200
#########################################################gwcc insecure temporary file creationVendor:http://gwcc.sourceforge.net/Advisory:http://www.zataz.net/adviso/gwcc-09052005.txtVendor informed: yesExploit available: yesImpact : lowExploitation : low#########################################################The vulnerability is caused due to temporary file being created insecurely.This can be exploited via symlink attacks to create and overwritearbitrary files
with the privileges of the user running the affected script.Secunia report that this bug was discovered by D1g1t4lLeech the 2005-09-16.ZATAZ Audit has discovered this bug the 2005-09-02So I think that D1g1t4lLeech is a true leecher ;)##########Versions:##########gwcc <= 0.9.6-r2##########Solution:##########To prevent symlink attack use kernel patch such as grsecurityGentoo Patch :http://bugs.gentoo.org/attachment.cgi?id=67477#########Timeline:#########Discovered : 2005-09-02Vendor notified : 2005-09-05Vendor response : no reponseVendor fix : no patchVendor Sec report (vendor-sec () lst de) : 2005-09-13Disclosure : 2005-09-16#####################Technical details :#####################Vulnerable code :-----------------Take a look at : src/callbacks.c1702 // Pipe print command and voila!, the doc is printed.1703 strcat(print_command, " /tmp/gwcc_out.txt");And also into : src/utils.c94 else if (strcmp(operation, "temp") == 0) {95 strcat(file_name, "/tmp/gwcc_out.txt");#########Related :#########Bug report :http://bugs.gentoo.org/show_bug.cgi?id=104566CVE : NONE#####################Credits :#####################Eric Romang (eromang () zataz net - ZATAZ Audit) - Gentoo Security ScoutThxs to Gentoo Security Team.
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- gwcc insecure temporary file creationZATAZ Audits (Sep 16)