Headline

GHSA-cfph-4qqh-w828: Arbitrary remote file read in Wrangler dev server

Impact

Sending specially crafted HTTP requests and inspector messages to Wrangler’s dev server could result in any file on the user’s computer being accessible over the local network. An attacker that could trick any user on the local network into opening a malicious website could also read any file.

Patches

This issue was fixed in [email protected]. Wrangler will now only serve files that are part of your bundle, or referenced by your bundle’s source maps.

Workarounds

Configure Wrangler to listen on local interfaces instead with wrangler dev --ip 127.0.0.1. This is the default as of [email protected], and removes the local network as an attack vector, but does not prevent an attack from visiting a malicious website.

References

https://github.com/cloudflare/workers-sdk/pull/4532
https://github.com/cloudflare/workers-sdk/pull/4535

10 months ago

ghsa

Open in Source

#vulnerability #web #nodejs #git

Package

npm wrangler (npm)

Affected versions

>= 3.9.0, < 3.19.0

Patched versions

3.19.0

Description

Impact

Patches

This issue was fixed in [email protected]. Wrangler will now only serve files that are part of your bundle, or referenced by your bundle’s source maps.

Workarounds

Configure Wrangler to listen on local interfaces instead with wrangler dev --ip 127.0.0.1. This is the default as of [email protected], and removes the local network as an attack vector, but does not prevent an attack from visiting a malicious website.

References