Created
March 31, 2024 13:51
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Check if your server is vulnerable to xz backdoor
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#! /bin/bash | |
set -eu | |
# find path to liblzma used by sshd | |
path="$(ldd $(which sshd) | grep liblzma | grep -o '/[^ ]*')" | |
# does it even exist? | |
if [ "$path" == "" ] | |
then | |
echo probably not vulnerable | |
exit | |
fi | |
# check for function signature | |
if hexdump -ve '1/1 "%.2x"' "$path" | grep -q f30f1efa554889f54c89ce5389fb81e7000000804883ec28488954241848894c2410 | |
then | |
echo probably vulnerable | |
else | |
echo probably not vulnerable | |
fi |
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