registry / Remote code execution / @lemonbeijing/lemonclaw-cli
@lemonbeijing/lemonclaw-cli
Portable LemonClaw CLI launcher for WorkBuddy.
This report shows the evidence for @lemonbeijing/lemonclaw-cli@1.0.4. 1 of 2 known versions is blocked or flagged. The newest version, 1.0.5, is flagged. See all versions.
AI Security Review
scanned 2mo ago · by lpm-firewall-aiThis is a remote-code bootstrap executed automatically at install time, with trust rooted solely in a remotely served manifest. It creates a concrete install-time arbitrary-code-execution supply-chain surface.
Static reason
One or more suspicious static signals were detected.
Trigger
npm postinstall
Impact
A party controlling the allowed download host can cause arbitrary code execution during npm installation.
Mechanism
remote payload download, extraction, and smoke-test execution
Attack narrative
On npm installation, postinstall bootstraps a platform runtime. It prefers a remote manifest from the vendor host, which supplies both archive URL and SHA-256. The package downloads and extracts that archive into ~/.lemonclaw-cli, then invokes its Python interpreter for a smoke test. Host restriction and hash verification do not authenticate a payload independently of the remote manifest; a compromised allowed host can provide matching malicious bytes and hash for immediate install-time execution.
AI rationale
This is a remote-code bootstrap executed automatically at install time, with trust rooted solely in a remotely served manifest. It creates a concrete install-time arbitrary-code-execution supply-chain surface.
Evidence
package.jsondist/postinstall.cjsruntime-manifest.json~/.lemonclaw-cli
Network endpoints2
download.ningmengyun.com/Skills/lemonclaw/runtime-manifest.jsondownload.ningmengyun.com
Decision evidence
public snapshotAI called this Malicious at 94.0% confidence as Malware with low false-positive risk.
Evidence for block
- npm postinstall invokes runtime bootstrap.
- Bootstrap prefers an unsigned remote manifest and accepts its archive hash.
- It downloads, extracts, and executes the remote Python runtime during installation.
Evidence against
- Downloads are HTTPS-host-restricted to download.ningmengyun.com.
- Archive size and SHA-256 are checked against manifest values.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
HighEntropyStringsUrlStrings
NoLicense
Source & flagged code
4 flagged · loading sourcepackage.jsonView file
•scripts.postinstall = node dist/postinstall.cjs
High
Install Time Lifecycle Scripts
Package defines install-time lifecycle scripts.
package.jsonView on unpkg•scripts.postinstall = node dist/postinstall.cjs
Medium
Ambiguous Install Lifecycle Script
Install-time lifecycle script is not statically allowlisted and needs review.
package.jsonView on unpkgdist/postinstall.cjsView file
3637var MANIFEST_PATH = path.join(__dirname, "..", "runtime-manifest.json");
var DEFAULT_REMOTE_MANIFEST_URL = "https://download.ningmengyun.com/Skills/lemonclaw/runtime-manifest.json";
var DEFAULT_MANIFEST_TIMEOUT_MS = MANIFEST_TIMEOUT_MS;
var MAX_MANIFEST_BYTES = 1024 * 1024;
var TRUSTED_RUNTIME_HOSTS = Object.freeze(["download.ningmengyun.com"]);
High
Ai Review Evidence
Bootstrap prefers an unsigned remote manifest and accepts its archive hash.
Findings
3 High4 Medium5 Low
HighInstall Time Lifecycle Scriptspackage.json
HighAi Review Evidencedist/postinstall.cjs
HighAi Review Evidencedist/postinstall.cjs
MediumAmbiguous Install Lifecycle Scriptpackage.json
MediumNetwork
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
LowScripts Present
LowFilesystem
LowHigh Entropy Strings
LowUrl Strings
LowNo License
Affected versions and remediation
This report applies to @lemonbeijing/lemonclaw-cli@1.0.4.
The versions list below shows the verdict for each recorded version.
- Avoid installing @lemonbeijing/lemonclaw-cli@1.0.4. Remove it from direct dependencies and check your lockfile for transitive copies.
- Choose an independently verified alternative or release. This report does not establish that other versions are safe.
- If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment.
Evidence last updated: .
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