T09 · Insecure Skill Coding Practices
- Location
scripts/rename-topic.sh:202- Finding
Telegram Bot Token Exposed in Process Command-Line Arguments
- Content
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Vulnerability Details
File Location:
scripts/rename-topic.sh, lines 202–227
Vulnerability Type: Credential exposure through process arguments
Risk Level: Mediumbash CURL_ARGS=(-s "https://api.telegram.org/bot${BOT_TOKEN}/editForumTopic") CURL_ARGS+=(-d "chat_id=${CHAT_ID}") CURL_ARGS+=(-d "message_thread_id=${THREAD_ID}") CURL_ARGS+=(--data-urlencode "name=${NAME}") # Add icon if provided if [ -n "$ICON" ]; then # Check if it's a 19-digit ID if [[ "$ICON" =~ ^[0-9]{19}$ ]]; then ICON_ID="$ICON" elif [ -n "${ICON_MAP[$ICON]}" ]; then ICON_ID="${ICON_MAP[$ICON]}" else echo "Warning: Icon '$ICON' not found, skipping icon change" echo "警告：图标 '$ICON' 未找到，跳过图标更换" ICON_ID="" fi if [ -n "$ICON_ID" ]; then CURL_ARGS+=(-d "icon_custom_emoji_id=${ICON_ID}") echo "Using icon ID / 使用图标 ID: $ICON_ID" fi fi # Execute curl "${CURL_ARGS[@]}" | jq .Technical Analysis
The Telegram bot token is interpolated directly into the Bot API URL stored in
CURL_ARGS. Whencurlis launched, this URL becomes part of the child process's command-line argument vector.Depending on operating-system hardening and process-monitoring configuration, command-line arguments may be observable through process listings,
/procinterfaces, audit systems, endpoint monitoring, diagnostic tooling, or process telemetry. An authorized local user or monitoring service capable of viewing thecurlprocess arguments could therefore recover the complete bot token.The request is sent to Telegram's declared official API endpoint over HTTPS, so this is not an unauthorized outbound exfiltration channel. The weakness is the local exposure of the credential before and during request execution.
Attack Path
- A legitimate user runs
scripts/rename-topic.shwithTELEGRAM_BOT_TOKENconfigured. - The script constructs a URL containing the token:
https://api.telegram.org/bot<token>/editForumTopic. - The shell launche ...[truncated 1157 chars]
- A legitimate user runs
- Remediation
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Remediation Suggestions
- Do not place the bot token in a child process's command-line arguments.
- Supply the sensitive URL through a protected mechanism that does not expose it in the normal process argument vector, such as a curl configuration delivered through standard input or a restricted file descriptor.
- Ensure any temporary credential-bearing configuration is created with restrictive permissions, is not written to a shared directory, and is securely removed immediately after use.
- Disable or redact command-line capture for this invocation in audit, tracing, shell-debugging, and endpoint-monitoring systems.
- Restrict local process visibility where supported, such as by applying appropriate
/procmount protections and least-privilege execution controls. - Run the script under a dedicated account with only the access necessary for its task.
- Rotate the Telegram bot token if process telemetry, logs, or monitoring systems may already have captured it.
- Review and minimize the bot's Telegram administrator permissions to reduce the impact of future credential compromise.