CVE-2023-7080
The V8 inspector intentionally allows arbitrary code execution within the Workers sandbox for debugging. wrangler dev would previously start an inspector server listening on all network interfaces.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.63%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
The V8 inspector intentionally allows arbitrary code execution within the Workers sandbox for debugging. wrangler dev would previously start an inspector server listening on all network interfaces. This would allow an attacker on the local network to connect to the inspector and run arbitrary code. Additionally, the inspector server did not validate Origin/Host headers, granting an attacker that can trick any user on the local network into opening a malicious website the ability to run code. If wrangler dev --remote was being used, an attacker could access production resources if they were bound to the worker. This issue was fixed in wrangler@3.19.0 and wrangler@2.20.2. Whilst wrangler dev's inspector server listens on local interfaces by default as of wrangler@3.16.0, an SSRF vulnerability in miniflare https://github.com/cloudflare/workers-sdk/security/advisories/GHSA-fwvg-2739-22v7 (CVE-2023-7078) allowed access from the local network until wrangler@3.18.0. wrangler@3.19.0 and wrangler@2.20.2 introduced validation for the Origin/Host headers.
- CVSS 3.1
- 8.0 HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 0.63% probability · 48th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-269
- Affected
- cloudflare/wrangler
- Source
- cna@cloudflare.com
References
- https://github.com/cloudflare/workers-sdk/issues/4430Issue Tracking, Patch
- https://github.com/cloudflare/workers-sdk/pull/4437Patch
- https://github.com/cloudflare/workers-sdk/pull/4535Patch
- https://github.com/cloudflare/workers-sdk/pull/4550Patch
- https://github.com/cloudflare/workers-sdk/security/advisories/GHSA-f8mp-x433-5wpfMitigation, Patch, Third Party Advisory
- https://github.com/cloudflare/workers-sdk/issues/4430Issue Tracking, Patch
- https://github.com/cloudflare/workers-sdk/pull/4437Patch
- https://github.com/cloudflare/workers-sdk/pull/4535Patch
- https://github.com/cloudflare/workers-sdk/pull/4550Patch
- https://github.com/cloudflare/workers-sdk/security/advisories/GHSA-f8mp-x433-5wpfMitigation, Patch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.