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FIX(99.5.4): fix regex to allow other authkey options than "from"

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This commit is contained in:
Charles Herlin
2019-03-15 18:17:48 +01:00
parent 41e3402b10
commit 8f87d75293
2 changed files with 26 additions and 9 deletions
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9
bin/hardening/99.5.4_ssh_keys_from.sh
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@ -17,7 +17,8 @@ DESCRIPTION="Check <from> field in ssh authorized keys files for users with logi
# Regex looking for empty, hash starting lines, or 'from="127.127.127,127.127.127" ssh'
# shellcheck disable=2089
REGEX="^(from=(?:'|\")(,?(\d{1,3}(\.\d{1,3}){3}))+(?:'|\")\s+ssh|#|$)"
REGEX_FROM_IP="from=(?:'|\")(,?(\d{1,3}(\.\d{1,3}){3}))+(?:'|\")"
REGEX_OK_LINES="(^(#|$)|($REGEX_FROM_IP))"
AUTHKEYFILE_PATTERN=""
AUTHKEYFILE_PATTERN_DEFAULT=".ssh/authorized_keys .ssh/authorized_keys2"
@ -33,7 +34,7 @@ check_ip() {
warn "No allowed IPs to treat";
return ;
fi
for line in $($SUDO_CMD grep -ne "from" "$file" | tr -s " " | sed 's/ /_/g' ); do
for line in $($SUDO_CMD grep -noP "$REGEX_FROM_IP" "$file" | tr -s " " | sed 's/ /_/g' ); do
linum=$(echo "$line" | cut -d ':' -f 1)
ips=$(echo "$line" | cut -d '"' -f 2 | tr ',' ' ')
ok_ips_allowed=""
@ -69,8 +70,8 @@ check_file() {
if $SUDO_CMD [ -r "$file" ]; then
debug "Treating $file"
FOUND_AUTHKF=1
if $SUDO_CMD grep -vqP "$REGEX" "${file}" ; then
bad_lines="$(grep -vnP "$REGEX" "${file}" | cut -d ':' -f 1 | tr '\n' ' ' | sed 's/ $//' )"
if $SUDO_CMD grep -vqP "$REGEX_OK_LINES" "${file}" ; then
bad_lines="$(grep -vnP "$REGEX_OK_LINES" "${file}" | cut -d ':' -f 1 | tr '\n' ' ' | sed 's/ $//' )"
crit "There are anywhere access keys in ${file} at lines (${bad_lines})."
else
ok "File ${file} is cleared from anywhere access keys."