#########################################################
apachetop insecure temporary file creation
Vendor: http://clueful.shagged.org/apachetop/
Advisory: http://www.zataz.net/adviso/apachetop-09022005.txt
Vendor informed: yes
Exploit available: yes
Impact : low
Exploitation : low
#########################################################
The vulnerability is caused due to temporary file being created insecurely.
This can be exploited via symlink attacks in combination to create and
overwrite arbitrary files with the privileges of the user running the
affected script.
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Versions:
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apachetop <= 0.12.5
##########
Solution:
##########
Apply : apachetop_CAN-2005-2660.patch
Patch from Steve Kemp (Debian)
http://bugs.gentoo.org/attachment.cgi?id=69342
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Timeline:
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Discovered : 2005-09-02
Vendor notified : 2005-09-02
Vendor response : no reponse
Vendor fix : no patch
Vendor Sec report (vendor-sec@lst.de) : 2005-09-13
Disclosure : 2005-09-30
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Technical details :
#####################
Vulnerable code :
-----------------
ake a look at : src/apachetop.h
247 #define DEBUG_OUTPUT "/tmp/atop.debug"
Then in : src/apachetop.cc
85 cf.debug = true;
1103 int dprintf(const char *fmt, ...) /* {{{ */
1104 {
1105 FILE *d;
1106 va_list args;
1107
1108 if (cf.debug && (d = fopen(DEBUG_OUTPUT, "a")))
1109 {
1110 va_start(args, fmt);
1111 vfprintf(d, fmt, args);
1112 fclose(d);
1113 va_end(args);
1114 }
1115
1116 return 0;
1117 } /* }}} */
#########
Related :
#########
Bug report : http://bugs.gentoo.org/show_bug.cgi?id=104473
CVE : CAN-2005-2660
#####################
Credits :
#####################
Eric Romang (eromang@zataz.net - ZATAZ Audit) - Gentoo security scout
Thxs to Gentoo Security Team.
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