CVE-2024-43798 is a critical authentication bypass vulnerability in Chisel, a fast TCP/UDP tunneling tool. The Chisel server fails to properly read the documented AUTH environment variable, allowing any unauthenticated user to connect even when credentials are set, impacting users who rely on this variable for authentication. This vulnerability carries a CVSS score of 8.6 (HIGH) due to its network-based attack vector, low complexity, and potential for high confidentiality impact, as it can enable unauthorized access to private networks and Man-in-the-Middle attacks. There is currently no evidence of active exploitation, public exploit code, or significant community discussion, but users are strongly advised to upgrade to Chisel version 1.10.0 immediately as there are no known workarounds.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
| Jpillora | Chisel | < 1.10.0CNA affected |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
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