T05 · Unauthorized Access and Privilege Escalation
Error
- Location
- scripts/test-cli-commands.sh:42
- Finding
- Overbroad Environment Credential Discovery<![CDATA[ ## Vulnerability Details **File Location**: `scripts/test-cli-commands.sh`, lines 42–56 **Vulnerability Type**: Excessive access to credentials in the process environment **Risk Level**: High ### Vulnerable Code ```bash scan_credentials() { local ak="" sk="" for var in $(env | grep -iE '^(HUAWEI|HW|HWC).*(_AK|ACCESS_KEY|_SK|SECRET_KEY)' | cut -d= -f1 | sort -u); do case "$var" in *_AK|*ACCESS_KEY) ak="${!var}" ;; *_SK|*SECRET_KEY) sk="${!var}" ;; esac done if [ -z "$ak" ] || [ -z "$sk" ]; then echo "ERROR: AK/SK not found in environment variables." echo "Set HUAWEI_CLOUD_AK and HUAWEI_CLOUD_SK environment variables." exit 1 fi echo "Credentials found in environment variables." } ``` ### Technical Analysis The script enumerates the complete process environment and searches for any variable with a Huawei-related prefix and a suffix resembling an access key or secret key. It then uses indirect expansion (`${!var}`) to retrieve the value of every matching variable. The test suite only requires the documented `HUAWEI_CLOUD_AK` and `HUAWEI_CLOUD_SK` variables. It does not need to discover alternative credentials or read their values merely to determine whether authentication is configured. Consequently, this implementation crosses a least-privilege boundary by accessing potentially unrelated Huawei credentials inherited by the process. The current script does not print or transmit these values, so direct credential exfiltration was not identified. Nevertheless, reading unrelated secrets unnecessarily exposes them to future script changes, debugging facilities, process inspection, or accidental logging. ### Attack Path 1. A user or automation system runs the verification script in an environment containing multiple Huawei credentials. 2. `scan_credentials` invokes `env` and identifies all matching access-key and secret-key variable names. 3. Indirect shell expans ...[truncated 683 chars]
- Remediation
- <![CDATA[ ## Remediation Suggestions Check only the presence of the two documented variables and avoid reading their values: ```bash scan_credentials() { if [ -z "${HUAWEI_CLOUD_AK:-}" ] || [ -z "${HUAWEI_CLOUD_SK:-}" ]; then echo "ERROR: Required CloudRobo credentials are not configured." >&2 exit 1 fi echo "Required credential variables are configured." } ``` Additional hardening measures: 1. Do not enumerate the complete environment. 2. Do not support ambiguous credential aliases unless each alias is explicitly documented and required. 3. Never print credential values or enable shell tracing around credential-handling code. 4. Run tests with a dedicated, least-privileged CloudRobo credential. 5. Remove unnecessary secrets from the test process environment before execution. ]]>