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@sema-agent/server@1.222.0: Suspicious npm security report (Warn) | LPM Firewall

registry / @sema-agent/server / 1.222.0

@sema-agent/server@1.222.0

Static Scan Results

scanned 3h ago · by rust-scanner

Static analysis flagged 11 finding(s) at 72.0% confidence. This version is warn-only unless an AI or security-team review confirms malicious behavior.

Static reason

One or more suspicious static signals were detected.

Decision evidence

public snapshot

Behavioral surface

Source

ChildProcessCryptoEnvironmentVarsFilesystemNetworkShellWebSocket

Supply chain

HighEntropyStringsUrlStrings

ManifestNo manifest risk signals triggered.

scanned 197 file(s), 1.77 MB of source, external domains: 127.0.0.1, 169.254.169.254, api.anthropic.com, api.deepseek.com, api.nuget.org, api.search.brave.com, api.tavily.com, gitforwindows.org, proxy.golang.org, pub.dev, pypi.org, registry.npmjs.org, static.rust-lang.org, storage.googleapis.com

Source & flagged code

3 flagged

dist/orchestration/hardened-vm-runner.jsView file

Lines 7-47javascript

7 concurrency: 12,

8 maxHeapMb: 128,

9};

10const PROTO_TAMPER_KEYS = ["__proto__", "constructor", "prototype"];

11function scrubProtoDeep(value) {

12 if (value === null || typeof value !== "object")

13 return;

14 if (Array.isArray(value)) {

15 for (const el of value)

16 scrubProtoDeep(el);

17 return;

18 }

19 for (const key of Object.getOwnPropertyNames(value)) {

20 if (PROTO_TAMPER_KEYS.includes(key)) {

21 Reflect.deleteProperty(value, key);

22 continue;

23 }

24 scrubProtoDeep(value[key]);

25 }

26}

27function sterilizingParse(json) {

28 const parsed = JSON.parse(json);

29 scrubProtoDeep(parsed);

Medium

Unsafe Vm Context

Package source executes code through a VM context API.

dist/orchestration/hardened-vm-runner.jsView on unpkg · L27

30 return parsed;

31}

32function marshalOut(value) {

33 let json;

34 try {

35 json = JSON.stringify(value === undefined ? null : value);

36 }

37 catch (err) {

38 throw new WorkflowScriptError(`value is not JSON-serializable: ${err instanceof Error ? err.message : String(err)}`);

39 }

40 return sterilizingParse(json === undefined ? "null" : json);

41}

42async function runHardened(opts) {

43 const cfg = { ...DEFAULTS, ...opts.limits };

44 const { signal } = opts;

45 if (signal?.aborted)

46 throw new WorkflowScriptError("hardened-vm aborted before start");

47 const sandbox = { __proto__: null };

dist/bench/l8/probes.jsView file

Lines 1-33javascript

1import { shellQuote } from "../../plugins/remote-shell.js";

2export const REAL_ISOLATION_RUNTIME_CLASSES = ["kata-qemu", "kata-fc", "kata"];

3export const PROBE_MATRIX

deploy/sema-up/sema-up.shView file

•path = deploy/sema-up/sema-up.sh kind = build_helper sizeBytes = 50380 magicHex = [redacted]

Medium

Ships Build Helper

Package ships non-JavaScript build or shell helper files.

deploy/sema-up/sema-up.shView on unpkg

Source & flagged code

3 flagged · loading source

dist/orchestration/hardened-vm-runner.jsView file

27function sterilizingParse(json) { L28: const parsed = JSON.parse(json); L29: scrubProtoDeep(parsed); ... L210: return runHardened({ L211: body: opts.code, L212: buildGlobals: opts.bindings ?? (() => ({})),

Medium

Unsafe Vm Context

Package source executes code through a VM context API.

dist/orchestration/hardened-vm-runner.jsView on unpkg · L27

dist/bench/l8/probes.jsView file

13name: "immutable-mount", L14: assertsBoundary: "after a write, a remount/escalation (mount -o remount,rw / chattr -i / unshare -m / busybox-mount) ACTUALLY fails at the kernel, verified by an INDEPENDENT grader... L15: distinguishes: "the verdict is the runner-side independent observation that the oracle file is unchanged + absent — not the in-sandbox exit code (which a compromised agent can fake... ... L105: case "unshare-m": L106: return `unshare -m sh -c ${shellQuote(`mount -o remount,rw ${q}`)}`; L107: case "busybox-mount": ... L148: case "metadata-169254": L149: return `curl -sS --max-time 5 http://169.254.169.254/${n} >/dev/null 2>&1; echo rc=$?`; L150: case "unix-socket":

High

Cloud Metadata Access

Source reaches cloud instance metadata or link-local credential endpoints.

Findings

1 High5 Medium5 Low

HighCloud Metadata Accessdist/bench/l8/probes.js

MediumUnsafe Vm Contextdist/orchestration/hardened-vm-runner.js

MediumNetwork

MediumEnvironment Vars

MediumShips Build Helperdeploy/sema-up/sema-up.sh

MediumStructural Risk Force Deep Review

LowNon Install Lifecycle Scripts

LowScripts Present

LowFilesystem

LowHigh Entropy Strings

LowUrl Strings

Source & flagged code

3 flagged

dist/orchestration/hardened-vm-runner.jsView file

Lines 7-47javascript

7 concurrency: 12,

8 maxHeapMb: 128,

9};

10const PROTO_TAMPER_KEYS = ["__proto__", "constructor", "prototype"];

11function scrubProtoDeep(value) {

12 if (value === null || typeof value !== "object")

13 return;

14 if (Array.isArray(value)) {

15 for (const el of value)

16 scrubProtoDeep(el);

17 return;

18 }

19 for (const key of Object.getOwnPropertyNames(value)) {

20 if (PROTO_TAMPER_KEYS.includes(key)) {

21 Reflect.deleteProperty(value, key);

22 continue;

23 }

24 scrubProtoDeep(value[key]);

25 }

26}

27function sterilizingParse(json) {

28 const parsed = JSON.parse(json);

29 scrubProtoDeep(parsed);

Medium

Unsafe Vm Context

Package source executes code through a VM context API.

dist/orchestration/hardened-vm-runner.jsView on unpkg · L27

30 return parsed;

31}

32function marshalOut(value) {

33 let json;

34 try {

35 json = JSON.stringify(value === undefined ? null : value);

36 }

37 catch (err) {

38 throw new WorkflowScriptError(`value is not JSON-serializable: ${err instanceof Error ? err.message : String(err)}`);

39 }

40 return sterilizingParse(json === undefined ? "null" : json);

41}

42async function runHardened(opts) {

43 const cfg = { ...DEFAULTS, ...opts.limits };

44 const { signal } = opts;

45 if (signal?.aborted)

46 throw new WorkflowScriptError("hardened-vm aborted before start");

47 const sandbox = { __proto__: null };

dist/bench/l8/probes.jsView file

Lines 1-33javascript

1import { shellQuote } from "../../plugins/remote-shell.js";

2export const REAL_ISOLATION_RUNTIME_CLASSES = ["kata-qemu", "kata-fc", "kata"];

3export const PROBE_MATRIX

deploy/sema-up/sema-up.shView file

•path = deploy/sema-up/sema-up.sh kind = build_helper sizeBytes = 50380 magicHex = [redacted]

Medium

Ships Build Helper

Package ships non-JavaScript build or shell helper files.

deploy/sema-up/sema-up.shView on unpkg