![]() Because the array was declared very large, the bounds checking will pass Negative values will simply be represented as very large numbers. For ints, the 2's complement representation is used. The vulnerability is present in different forms in all versions, including `0.3.10`. ![]() The typechecker allows the usage of signed integers to be used as indexes to arrays. The typechecker doesn't throw when spotting the usage of an `int` as an index for an array. Arrays can be keyed by a signed integer, while they are defined for unsigned integers only. Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine. There are no known workarounds for this vulnerability. This issue has been addressed in version 2.4.15.2. Attackers can craft requests that would make the server work very hard (and possibly become unresponsive) and/or crash with minimal effort. ![]() Making a few requests of this kind caused our server to become unresponsive. An internal security audit has been conducted and the reviewers found that if they manipulated the value of the mod_auth_openidc_session_chunks cookie to a very large integer, like 99999999, the server struggles with the request for a long time and finally gets back with a 500 error. In affected versions missing input validation on mod_auth_openidc_session_chunks cookie value makes the server vulnerable to a denial of service (DoS) attack. Mod_auth_openidc is an OpenID Certified™ authentication and authorization module for the Apache 2.x HTTP server that implements the OpenID Connect Relying Party functionality. ![]()
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