registry / bvm-core / 1.1.41

bvm-core@1.1.41

Need a Bun version manager? BVM installs, switches, and isolates Bun versions across Windows, macOS, and Linux.

Static Scan Results

scanned 2h ago · by rust-scanner

Static analysis flagged 16 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

ChildProcessCryptoEnvironmentVarsFilesystemNetwork

Supply chain

HighEntropyStringsObfuscatedUrlStrings

ManifestNo manifest risk signals triggered.

scanned 4 file(s), 102 KB of source, external domains: 1.1.1.1, api.github.com, bvm-core.nexsail.top, cdn.jsdelivr.net, example.com, github.com, mirrors.cloud.tencent.com, registry.npmjs.org, registry.npmmirror.com

Source & flagged code

8 flagged

package.jsonView file

Lines 17-57json

17 "bugs": {

18 "url": "https://github.com/EricLLLLLL/bvm/issues"

19 },

20 "scripts": {

21 "dev": "bun run src/index.ts",

22 "build": "bun run scripts/check-templates.ts && bun build src/index.ts --target=bun --outfile dist/index.js --minify && bun run scripts/sync-runtime.ts",

Source & flagged code

8 flagged · loading source

package.jsonView file

•scripts.postinstall = node scripts/postinstall.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node scripts/postinstall.js

Medium

Ambiguous Install Lifecycle Script

Install-time lifecycle script is not statically allowlisted and needs review.

package.jsonView on unpkg

bin/bvm-npm.jsView file

6L7: const { spawnSync } = require('child_process'); L8: const path = require('path');

High

Child Process

Package source references child process execution.

bin/bvm-npm.jsView on unpkg · L6

dist/index.jsView file

4`);return}this.timer=setInterval(()=>{process.stdout.write(`\r\x1B[K${w.cyan(this.frames[this.frameIndex])} ${this.text}`),this.frameIndex=(this.frameIndex+1)%this.frames.length},8... L5: `)}render(b){let $=Math.min(1,this.current/this.total),c=Math.round(this.width*$),f=this.width-c,u=process.platform==="win32",y=u?"=":"\u2588",_=u?"-":"\u2591",m=w.green(y.repeat(c... L6: `)){let y=u.match(/refs\/tags\/bun-v?(\d+\.\d+\.\d+.*)$/);if(y)f.push(y[1])}return f}async function M$(){if(W())return[...Zb];try{let $=(await ec()).filter((c)=>l(c)).map((c)=>({v:...

High

Same File Env Network Execution

A single source file combines environment access, network access, and code or shell execution; review context before blocking.

dist/index.jsView on unpkg · L4

High

Command Output Exfiltration

Source combines command execution, command-output handling, and outbound requests; review data flow before blocking.

dist/index.jsView on unpkg · L2

2// @bun L3: var Xc=Object.defineProperty;var dc=(b)=>b;function Mc(b,$){this[b]=dc.bind(null,$)}var B$=(b,$)=>{for(var c in $)Xc(b,c,{get:$[c],enumerable:!0,configurable:!0,set:Mc.bind($,c)})}... L4: `);return}this.timer=setInterval(()=>{process.stdout.write(`\r\x1B[K${w.cyan(this.frames[this.frameIndex])} ${this.text}`),this.frameIndex=(this.frameIndex+1)%this.frames.length},8... L5: `)}render(b){let $=Math.min(1,this.current/this.total),c=Math.round(this.width*$),f=this.width-c,u=process.platform==="win32",y=u?"=":"\u2588",_=u?"-":"\u2591",m=w.green(y.repeat(c... L6: `)){let y=u.match(/refs\/tags\/bun-v?(\d+\.\d+\.\d+.*)$/);if(y)f.push(y[1])}return f}async function M$(){if(W())return[...Zb];try{let $=(await ec()).filter((c)=>l(c)).map((c)=>({v:... ... L12: Global Flags:`),console.log(" --help, -h Show this help message"),console.log(" --version, -v Show version number"),console.log(` L13: Examples:`),console.log(" bvm install 1.0.0"),console.log(" bvm use 1.0.0"),console.log(" bvm run 1.0.0 index.ts")}}I();d();import{join as T,basename as nf}from"path";M();M();as... L14: ... L495: } L496: `;var D$=R$;async function xf(){if(K!=="win32

Medium

Install Persistence

Source writes installer persistence such as shell profile or service configuration.

dist/index.jsView on unpkg · L2

scripts/postinstall.jsView file

4* BVM Post-install Script (Smart Edition) L5: * Bunker-First: Manages BVM private runtime in runtime/ bunker. L6: */ ... L9: const path = require('path'); L10: const { spawnSync } = require('child_process'); L11: const { createHash, timingSafeEqual } = require('crypto'); ... L13: L14: const IS_WINDOWS = process.platform === 'win32'; L15: const HOME = process.env.HOME || os.homedir(); L16: const BVM_DIR = process.env.BVM_DIR || path.join(HOME, '.bvm'); ... L43: } L44: const expected = Buffer.from(integrity.slice(7), 'base64');

High

Sandbox Evasion Gated Capability

Source gates dangerous network, credential, or execution behavior behind CI, host, platform, time, or geo fingerprint checks.

scripts/postinstall.jsView on unpkg · L4

dist/bvm-shim.shView file

•path = dist/bvm-shim.sh kind = build_helper sizeBytes = 2575 magicHex = [redacted]

Medium

Ships Build Helper

Package ships non-JavaScript build or shell helper files.

dist/bvm-shim.shView on unpkg

Findings

5 High6 Medium5 Low

HighInstall Time Lifecycle Scriptspackage.json

HighChild Processbin/bvm-npm.js

HighSame File Env Network Executiondist/index.js

HighCommand Output Exfiltrationdist/index.js

HighSandbox Evasion Gated Capabilityscripts/postinstall.js

MediumAmbiguous Install Lifecycle Scriptpackage.json

MediumNetwork

MediumEnvironment Vars

MediumInstall Persistencedist/index.js

MediumShips Build Helperdist/bvm-shim.sh

MediumStructural Risk Force Deep Review

LowScripts Present

LowFilesystem

LowObfuscated

LowHigh Entropy Strings

LowUrl Strings

dist/index.jsView file

Lines 1-24javascript

1#!/usr/bin/env bun

2// @bun

3var Xc=Object.defineProperty;var dc=(b)=>b;function Mc(b,$){this[b]=dc.bind(null,$)}var B$=(b,$)=>{for(var c in $)Xc(b,c,{get:$[c],enumerable:!0,configurable:!0,set:Mc.bind($,c)})};var Cb=(b,$)=>()=>(b&&($=b(b=0)),$);var Gb=import.meta.require;import{createInterface as Yc}from"readline";class Fb{timer=null;frames=process.platform==="win32"?["-"]:["\u280B","\u2819","\u2839","\u2838","\u283C","\u2834","\u2826","\u2827","\u2807","\u280F"];frameIndex=0;text;isWindows=process.platform==="win32";constructor(b){this.text=b}start(b){if(b)this.text=b;if(this.timer)return;if(this.isWindows){process.stdo ...

4`);return}this.timer=setInterval(()=>{process.stdout.write(`\r\x1B[K${w.cyan(this.frames[this.frameIndex])} ${this.text}`),this.frameIndex=(this.frameIndex+1)%this.frames.length},80)}stop(){

5`)}render(b){let $=Math.min(1,this.current/this.total),c=Math.round(this.width*$),f=this.width-c,u=process.platform==="win32",y=u?"=":"\u2588",_=u?"-":"\u2591",m=w.green(y.repeat(c))+w.gray(_.repeat(f)),v=($*100).toFixed(0).padStart(3," "),B=(this.current/1048576).toFixed(1),J=(this.total/1048576).toFixed(1),O=b?` ${b.speed}KB/s`:"";process.stdout.write(`\r\x1B[2K ${m} ${v}% | ${B}/${J}MB${O}`)}}async function q$(b){let $=Yc({input:process.stdin,output:process.stdout});return new Promise((c)=>{$.question(`${w.yellow("?")} ${b} (Y/n) `,(f)=>{$.close(),c(f.toLowerCase()!=="n")})})}var Ac,kc=(b)= ...

6`)){let y=u.match(/refs\/tags\/bun-v?(\d+\.\d+\.\d+.*)$/);if(y)f.push(y[1])}return f}async function M$(){if(W())return[...Zb];try{let $=(await ec()).filter((c)=>l(c)).map((c)=>({v:c,parsed:Bb(c)}));return $.sort((c,f)=>Pb(f.parsed,c.parsed)),$.map((c)=>c.v)}catch(b){try{let $=await bf();if($.length>0)return Array.from(new Set($.filter((f)=>l(f)))).sort

7${w.gray("Update available:")} ${w.green(`v${f.latestVersion}`)} ${w.dim(`(current: v${b})`)}

8${w.gray("Run")} ${w.cyan("bvm upgrade")} ${w.gray("to update.")}`}}catch(c){}return null}class tb{name;versionStr;commands={};helpEntries=[];optionDefinitions={help:{type:"boolean",short:"h"},version:{type:"boolean",short:"v"},silent:{type:"boolean",short:"s"}};constructor(b,$){this.name=b;this.versionStr=$}command(b,$,c={}){let f=b.split(" ")[0],u={description:$,usage:`${this.name} ${b}`,action:async()=>{},aliases:c.aliases,optionNames:new Set};this.commands[f]=u,this.helpEntries.push(` ${b.padEnd(35)} ${$}`),c.aliases?.forEach((_)=>{this.commands[_]=u});let y={action:(_)=>{return u.action= ...

9`),console.log("Usage:"),console.log(` ${this.name} <command> [flags]

10`),console.log("Commands:"),console.log(this.helpEntries.join(`

11`)),console.log(`

12Global Flags:`),console.log(" --help, -h Show this help message"),console.log(" --version, -v Show version number"),console.log(`

13Examples:`),console.log(" bvm install 1.0.0"),console.log(" bvm use 1.0.0"),console.log(" bvm run 1.0.0 index.ts")}}I();d();import{join as T,basename as nf}from"path";M();M();async function fb(b,$={}){let{cwd:c,env:f,prependPath:u,stdin:y="inherit",stdout:_="inherit",stderr:m="inherit"}=$,v={...process.env,...f};if(u){let O=v.PATH||"",Z=process.platform==="win32"?";":":";v.PATH

Medium

Install Persistence

Source writes installer persistence such as shell profile or service configuration.

dist/index.jsView on unpkg · L2

15# bvm-init.sh: Initializes bvm default version on shell startup

17# Check if BVM_DIR is set

18if [ -z "\${BVM_DIR}" ]; then

19 echo "[bvm:init] initialization failed: BVM_DIR is not set. Run 'bvm setup'." >&2

20 return

21fi

23if [ ! -x "\${BVM_DIR}/bin/bvm" ]; then

24 echo "[bvm:init] initialization failed: \${BVM_DIR}/bin/bvm not found. Run 'bvm setup'." >&2

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