{"record":{"id":"d37dd1bf4a4279cd","repo":"Hmbown/CodeWhale","slug":"unsupported-update-entry","errorCode":null,"errorMessage":"Unsupported update entry.","messagePattern":"Unsupported update entry\\.","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"crates/tui/plugins/computer-use/app/updates.mjs","lineNumber":63,"sourceCode":"  if(!response.ok) throw new Error(`The update service is unavailable (${response.status}). Try again later.`);\n  return releaseUpdate(JSON.parse((await responseBytes(response,1024*1024)).toString(\"utf8\")));\n}\n\n/** Inspect both ZIP headers before extraction: no links, traversal or bombs. */\nexport function validateReleaseZip(bytes) {\n  const minimum=Math.max(0,bytes.length-65557); let end=-1;\n  for(let i=bytes.length-22;i>=minimum;i--) if(bytes.readUInt32LE(i)===0x06054b50&&i+22+bytes.readUInt16LE(i+20)===bytes.length) { end=i; break; }\n  if(end<0||bytes.readUInt16LE(end+4)||bytes.readUInt16LE(end+6)) throw new Error(\"Invalid update archive.\");\n  const count=bytes.readUInt16LE(end+10); let position=bytes.readUInt32LE(end+16),total=0;\n  if(!count||count>2000||bytes.readUInt16LE(end+8)!==count||position+bytes.readUInt32LE(end+12)!==end) throw new Error(\"Invalid update archive index.\");\n  const seen=new Set();\n  for(let i=0;i<count;i++) {\n    if(position+46>end||bytes.readUInt32LE(position)!==0x02014b50) throw new Error(\"Invalid update entry.\");\n    const flags=bytes.readUInt16LE(position+8),method=bytes.readUInt16LE(position+10),length=bytes.readUInt16LE(position+28),extra=bytes.readUInt16LE(position+30),comment=bytes.readUInt16LE(position+32);\n    const name=bytes.subarray(position+46,position+46+length).toString(\"utf8\");\n    const kind=(bytes.readUInt32LE(position+38)>>>16)&0xf000,offset=bytes.readUInt32LE(position+42),compressed=bytes.readUInt32LE(position+20);\n    const size=bytes.readUInt32LE(position+24); total+=size;\n    if(flags&1||![0,8].includes(method)||![0,0x4000,0x8000].includes(kind)||total>512*1024*1024||position+46+length+extra+comment>end) throw new Error(\"Unsupported update entry.\");\n    if(!name.startsWith(`${APP_NAME}.app/`)||name.includes(\"\\\\\")||name.includes(\":\")||name.includes(\"\\0\")||name.split(\"/\").some(part=>part===\"..\"||part===\".\")||seen.has(name)) throw new Error(\"Unsafe update path.\");\n    seen.add(name);\n    if(offset+30>position||bytes.readUInt32LE(offset)!==0x04034b50) throw new Error(\"Invalid update file header.\");\n    const localLength=bytes.readUInt16LE(offset+26),localExtra=bytes.readUInt16LE(offset+28);\n    if(offset+30+localLength+localExtra+compressed>bytes.readUInt32LE(end+16)||bytes.subarray(offset+30,offset+30+localLength).toString(\"utf8\")!==name) throw new Error(\"Inconsistent update file header.\");\n    if(bytes.readUInt16LE(offset+8)!==method||bytes.readUInt16LE(offset+6)!==flags||(!(flags&8)&&(bytes.readUInt32LE(offset+18)!==compressed||bytes.readUInt32LE(offset+22)!==size))) throw new Error(\"Inconsistent update sizes or compression.\");\n    const start=offset+30+localLength+localExtra;\n    // Header sizes are untrusted. Bound actual expansion before ditto writes\n    // anything, including a compressed payload whose headers understate size.\n    const payload=bytes.subarray(start,start+compressed);\n    let expanded;\n    try { expanded=method===0?payload.length:inflateRawSync(payload,{maxOutputLength:Math.max(size,1)}).length; }\n    catch { throw new Error(\"Invalid or oversized compressed update entry.\"); }\n    if(expanded!==size) throw new Error(\"The update entry size did not match its contents.\");\n    position+=46+length+extra+comment;\n  }\n  if(position!==end) throw new Error(\"Invalid update archive length.\");\n  return count;","sourceCodeStart":45,"sourceCodeEnd":81,"githubUrl":"https://github.com/Hmbown/CodeWhale/blob/73e0f67d83c59909b571efdfc88c4bc28c309cb1/crates/tui/plugins/computer-use/app/updates.mjs#L45-L81","documentation":"After reading each central-directory entry's metadata, validateReleaseZip enforces an allowlist: the entry must not be encrypted (general-purpose flag bit 0), its compression method must be 0 (stored) or 8 (deflate), its POSIX mode-derived kind must be a regular file or a directory (0x4000/0x8000 bits — symlinks and special files are rejected), the running total of declared uncompressed sizes must stay under 512 MB, and the variable-length name+extra+comment must stay inside the central directory. Any violation throws this error because such entries are unsafe to inflate or extract into the app bundle.","triggerScenarios":"An update zip containing an encrypted entry, a compression method other than stored/deflate (e.g. bzip2/LZMA), a symlink or device entry (common when zipping with symlinks preserved), declared sizes summing above 512 MB, or a malformed entry whose name/extra/comment lengths overflow the central directory.","commonSituations":"Packaging a .app bundle that contains a symlink (e.g. Frameworks pointing into Versions) — symlinks are rejected by design; switching the build to a compression method like zstd; a build accidentally zipping a huge intermediate artifact past the 512 MB budget; a crafted zip in a security test.","solutions":["Inspect the zip (`unzip -v file.zip`) and remove/rebuild entries that are symlinks, encrypted, or use non-deflate compression.","Repackage with `zip -r -X` (or ditto -c -k --sequesterRsrc --keepParent) so entries are plain files/directories with deflate compression.","Check total uncompressed size (`unzip -l`) is under 512 MB and slim the bundle if not.","If a symlink is intentional, replace it with a real file/copy in the packaging step — the validator will never accept symlinks."],"exampleFix":"// before\nzip -r app.zip MyApp.app  # preserves symlinks → 'Unsupported update entry'\n// after\nditto -c -k --sequesterRsrc --keepParent MyApp.app app.zip  # real files only, deflate","handlingStrategy":"validation","validationCode":"const listing = execFileSync(\"unzip\", [\"-Z1\", zipPath]).toString();\nif (!listing.split(\"\\n\").every(n => n.startsWith(`${APP_NAME}.app/`))) throw new Error(\"entries outside app bundle\");","typeGuard":null,"tryCatchPattern":"try { validateReleaseZip(bytes); } catch (e) { if (e.message === \"Unsupported update entry.\") throw new Error(\"Archive contains symlinks/encryption/unusual compression — repackage with ditto -c -k\"); throw e; }","preventionTips":["Package with `ditto -c -k --sequesterRsrc --keepParent` (no symlink preservation)","Check `unzip -v` for method 0/8 only and no encryption flags","Keep total uncompressed size under 512 MB","Never include symlinks or special files in release bundles"],"tags":["zip","archive-parsing","security","symlink-rejected","compression"],"backgroundTag":"unsupported-operation","analyzedSha":"73e0f67d83c59909b571efdfc88c4bc28c309cb1","analyzedAt":"2026-09-22T01:30:00.501Z","contentChangedAt":"2026-09-22T01:30:00.501Z","schemaVersion":2},"datasetVersion":"2026-09-23T08:17:48.524Z"}