Impact

An uncaught panic triggered by malformed input to alloydynabi::TypedData could lead to a denial-of-service (DoS) via eip712signinghash().

Software with high availability requirements such as network services may be particularly impacted. If in use, external auto-restarting mechanisms can partially mitigate the availability issues unless repeated attacks are possible.

Patches

The vulnerability was patched by adding a check to ensure the element is not empty before accessing its first element; an error is returned if it is empty. The fix is included in version v1.4.1 and backported to v0.8.26.

Workarounds

There is no known workaround that mitigates the vulnerability. Upgrading to a patched version is the recommended course of action.

Reported by

Christian Reitter & Zeke Mostov from Turnkey

GlobalSunTech Wireless Access Points (1) WISECOM GL2422AP-0T, and possibly OEM products such as (2) D-Link DWL-900AP+ B1 2.1 and 2.2, (3) ALLOY GL-2422AP-S, (4) EUSSO GL2422-AP, and (5) LINKSYS WAP11-V2.2, allow remote attackers to obtain sensitive information like WEP keys, the administrator password, and the MAC filter via a "getsearch" request to UDP port 27155.