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#!/bin/bash
##CageFS proxyexec wrapper - ver 18

if [[ $EUID -eq 0 ]]; then
    echo 'Cannot be run as root'
    exit 1
fi

USR=`/usr/bin/whoami`
USER_TOKEN_PATH="/var/.cagefs/.cagefs.token"
WEBSITE_ISOLATION_FLAG="/opt/cloudlinux/flags/enabled-flags.d/website-isolation.flag"
# Trust boundary for the website-isolation token path: it must point
# directly at the regular file that create_website_token_directory()
# creates inside its root-owned per-user storage area. That area is
# /var/cagefs/<prefix>/<user>/.cagefs/website/... on the host and is
# bind-mounted into the cage at /var/.cagefs/website/... — both views
# are accepted because libenter.enter_site() picks one or the other
# depending on whether it runs inside or outside the cage. The file
# itself is never a symlink, so we reject symlinks outright rather
# than canonicalizing with realpath. Without this gate the attacker
# controls both the env var WEBSITE_TOKEN_PATH and the file contents
# at that path; the file contents land in $TOKEN, which is embedded
# into the ssh remote command argv below and re-parsed by the remote
# shell — so shell metacharacters in the file would execute on the
# origin host. (Slite #7 / CLOS-4490)
if [[ -f "$WEBSITE_ISOLATION_FLAG" && -n "$WEBSITE_TOKEN_PATH" ]]; then
    if [[ -L "$WEBSITE_TOKEN_PATH" ]]; then
        echo "cagefs.proxy: WEBSITE_TOKEN_PATH '$WEBSITE_TOKEN_PATH' must not be a symlink" >&2
        exit 1
    fi
    if [[ ! -f "$WEBSITE_TOKEN_PATH" ]]; then
        echo "cagefs.proxy: WEBSITE_TOKEN_PATH '$WEBSITE_TOKEN_PATH' is not an existing regular file" >&2
        exit 1
    fi
    # Reject `..` as a path component so the prefix check below cannot
    # be bypassed via traversal (e.g. /var/cagefs/../etc/passwd matches
    # the /var/cagefs/* glob but resolves outside the trusted area).
    case "$WEBSITE_TOKEN_PATH" in
        */../*|*/..)
            echo "cagefs.proxy: WEBSITE_TOKEN_PATH '$WEBSITE_TOKEN_PATH' must not contain '..' path components" >&2
            exit 1
            ;;
    esac
    case "$WEBSITE_TOKEN_PATH" in
        /var/cagefs/*|/var/.cagefs/*) ;;
        *)
            echo "cagefs.proxy: WEBSITE_TOKEN_PATH must be under /var/cagefs/ or /var/.cagefs/ (got '$WEBSITE_TOKEN_PATH')" >&2
            exit 1
            ;;
    esac
    USER_TOKEN_PATH="$WEBSITE_TOKEN_PATH"
fi
# The -L/-f/prefix gate above is defense-in-depth, TOCTOU is not exploitable because the
# forwarded $TOKEN must still equal the legit on-disk bytes that the
# origin's cagefs.server reads with open(..., O_NOFOLLOW) from a
# uid-derived path (see find_website_by_token() in
# proxyexec/cagefs.server.c) — a swapped symlink redirects what we
# cat, never what the server reads, so a TOCTOU substitution can only
# replace the forwarded bytes with something that fails the server's
# constant-time comparison.
TOKEN=`/bin/cat ${USER_TOKEN_PATH}`
# Tokens are generated as fixed-length alphanumerics by
# _generate_password() in py/clcagefslib/webisolation/jail_utils.py and
# by the corresponding C helper. Any non-alphanumeric byte means the
# token file was tampered with — refuse to forward it into the ssh
# remote command, where the remote shell would re-parse metacharacters.
# Use POSIX `case` rather than `[[ =~ ]]` because the wrapper is also
# invoked through `sh` (e.g. jenkins_tests/rpm_tests/p_cagefs/
# 939-environment_var-check.sh), and dash treats `[[` as a missing
# command — the regex form would falsely trip and exit the script.
case "$TOKEN" in
    "" | *[!A-Za-z0-9]*)
        echo "cagefs.proxy: refusing to forward malformed token from $USER_TOKEN_PATH" >&2
        exit 1
        ;;
esac
# It's user's tmp directory and write to it is secure procedure
# because this script is running only under usual user
PIDFILE="/tmp/.cagefs.proxy.$$"
USER_INTERRUPT=13
CWD=`pwd`

ctrl_c_handler() {
    if [[ -f "$PIDFILE" ]]; then
        pid=`/bin/cat $PIDFILE`
        /bin/rm -f $PIDFILE > /dev/null 2>&1
        /bin/kill -s SIGINT "$pid" > /dev/null 2>&1
    fi
    exit $USER_INTERRUPT
}

if [[ -e /var/.cagefs/origin ]]; then
    ORIGIN=`/bin/cat /var/.cagefs/origin`
    REMOTE="/usr/bin/ssh -F /etc/ssh/cagefs-rexec_config $USR@$ORIGIN"
    $REMOTE CAGEFS_TOKEN="$TOKEN" /usr/sbin/proxyexec -c cagefs.sock "$USR" "$CWD" SENDMAIL $$ "$@"
    RETVAL=$?
else
    trap 'ctrl_c_handler' 2
    CAGEFS_TOKEN="$TOKEN" /usr/sbin/proxyexec -c cagefs.sock "$USR" "$CWD" SENDMAIL $$ "$@"
    RETVAL=$?
    /bin/rm -f $PIDFILE > /dev/null 2>&1
fi

exit $RETVAL

Batal

⬅ usr 49 item

Nama	Tipe	Ukuran	Diubah	Aksi
📄cagefs_enter_site	file	1.8 KB	2026-07-31 12:31	✏️ 👁️
📄cagefsctl-user	file	15.6 KB	2026-07-31 12:31	✏️ 👁️
📄chroot	file	41.5 KB	2026-07-28 19:49	✏️ 👁️
📄cloudlinux-selector	file	654 B	2026-08-11 11:40	✏️ 👁️
📄consoletype	file	11.9 KB	2025-11-10 10:42	✏️ 👁️
📄cracklib-check	file	13 KB	2019-10-12 00:47	✏️ 👁️
📄cracklib-format	file	251 B	2019-10-12 00:47	✏️ 👁️
📄cracklib-packer	file	13.1 KB	2019-10-12 00:47	✏️ 👁️
📄cracklib-unpacker	file	9 KB	2019-10-12 00:47	✏️ 👁️
📄create-cracklib-dict	file	990 B	2019-10-12 00:47	✏️ 👁️
📄cxs	file	4.4 KB	2025-11-24 13:45	✏️ 👁️
📄ddns-confgen	file	20.5 KB	2026-08-13 18:53	✏️ 👁️
📄dnssec-checkds	file	936 B	2026-08-13 18:52	✏️ 👁️
📄dnssec-coverage	file	938 B	2026-08-13 18:52	✏️ 👁️
📄dnssec-dsfromkey	file	60.8 KB	2026-08-13 18:53	✏️ 👁️
📄dnssec-importkey	file	60.8 KB	2026-08-13 18:53	✏️ 👁️
📄dnssec-keyfromlabel	file	64.8 KB	2026-08-13 18:53	✏️ 👁️
📄dnssec-keygen	file	72.8 KB	2026-08-13 18:53	✏️ 👁️
📄dnssec-keymgr	file	934 B	2026-08-13 18:52	✏️ 👁️
📄dnssec-revoke	file	56.7 KB	2026-08-13 18:53	✏️ 👁️
📄dnssec-settime	file	60.8 KB	2026-08-13 18:53	✏️ 👁️
📄dnssec-signzone	file	117.2 KB	2026-08-13 18:53	✏️ 👁️
📄dnssec-verify	file	52.8 KB	2026-08-13 18:53	✏️ 👁️
📄exim	file	4.4 KB	2026-09-10 14:30	✏️ 👁️
📄faillock	file	20.5 KB	2026-08-18 13:12	✏️ 👁️
📄genrandom	file	12.4 KB	2026-08-13 18:53	✏️ 👁️
📄ip	file	693.3 KB	2024-05-23 08:36	✏️ 👁️
📄isc-hmac-fixup	file	11.9 KB	2026-08-13 18:53	✏️ 👁️
📄isolatectl	file	9.2 KB	2026-08-19 18:27	✏️ 👁️
📄ldconfig	file	986.1 KB	2026-07-21 14:52	✏️ 👁️
📄lvdctl	file	683 B	2026-08-19 18:27	✏️ 👁️
📄mkhomedir_helper	file	24.4 KB	2026-08-18 13:12	✏️ 👁️
📄named-checkzone	file	36.6 KB	2026-08-13 18:53	✏️ 👁️
📄named-compilezone	file	36.6 KB	2026-08-13 18:53	✏️ 👁️
📄nsec3hash	file	12.3 KB	2026-08-13 18:53	✏️ 👁️
📄pam_console_apply	file	45.2 KB	2026-08-18 13:12	✏️ 👁️
📄pam_timestamp_check	file	11.9 KB	2026-08-18 13:12	✏️ 👁️
📄pluginviewer	file	20.6 KB	2022-02-23 20:13	✏️ 👁️
📄proxyexec	file	25.4 KB	2026-08-17 19:22	✏️ 👁️
📄pwhistory_helper	file	20.4 KB	2026-08-18 13:12	✏️ 👁️
📄saslauthd	file	94.4 KB	2022-02-23 20:13	✏️ 👁️
📄sasldblistusers2	file	20.8 KB	2022-02-23 20:13	✏️ 👁️
📄saslpasswd2	file	16.4 KB	2022-02-23 20:13	✏️ 👁️
📄sendmail	file	4.4 KB	2026-09-10 14:30	✏️ 👁️
📄testsaslauthd	file	16.7 KB	2022-02-23 20:13	✏️ 👁️
📄tmpwatch	file	35.5 KB	2019-10-12 11:32	✏️ 👁️
📄tsig-keygen	file	20.5 KB	2026-08-13 18:53	✏️ 👁️
📄unix_chkpwd	file	36.9 KB	2026-08-18 13:12	✏️ 👁️
📄unix_update	file	36.9 KB	2026-08-18 13:12	✏️ 👁️

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