José Valim

**Name of the Vulnerable Software and Affected Versions** Elixir versions 1.5.0 through 1.20.0 **Description** Uncontrolled Resource Consumption in the standard library's Version module allows an attacker to cause a denial of service via CPU and memory exhaustion. The version parser converts numeric components to integers without bounding their length, forcing a super-linear, non-yielding base-10 to arbitrary-precision integer conversion through `String.to integer/1` (also known as `:erlang.binary to integer/1`). This process pins a BEAM scheduler, and larger components can trigger an uncaught `SystemLimitError` that crashes the calling process. A string of approximately one megabyte is sufficient to trigger this issue, and no authentication is required. The issue is reachable via the `parse digits/2` routine in `lib/version.ex` and public entry points including `Version.parse/1`, `Version.parse!/1`, `Version.match?/3`, `Version.compare/2`, and `Version.parse requirement/1`. **Recommendations** Update to version 1.20.1.

**Name of the Vulnerable Software and Affected Versions** plug versions 1.4.0 through 1.15.3 plug version 1.16.3 plug version 1.17.1 plug version 1.18.2 plug version 1.19.2 **Description** An unbounded buffer accumulation issue exists during multipart header parsing. The function `read part headers/2` in `lib/plug/conn.ex` fails to obey its `:length` parameter and lacks an upper bound on the size of the accumulated buffer. An unauthenticated remote attacker can exhaust server memory by sending a crafted `multipart/form-data` request where the body never yields a complete header section, such as by omitting the boundary delimiter or the `r r ` sequence. This causes the server process to accumulate memory linearly, potentially leading to a denial of service by exhausting BEAM memory. **Recommendations** Update plug to version 1.15.4 or newer. Update plug to a version later than 1.16.3. Update plug to a version later than 1.17.1. Update plug to a version later than 1.18.2. Update plug to a version later than 1.19.2.

**Name of the Vulnerable Software and Affected Versions** ericmj decimal versions 0.1.0 through 2.x **Description** Uncontrolled Resource Consumption allows unauthenticated remote Denial of Service. The library does not bound the exponent on parsed input, meaning a decimal with an excessively large exponent can be stored without error. Subsequent calls to functions such as `Decimal.add/2`, `Decimal.sub/2`, `Decimal.div/2`, `Decimal.to integer/1`, `Decimal.round/3`, `Decimal.compare/3` with a threshold, or `Decimal.to string/2` using :normal or :xsd formats allocate memory proportional to the exponent value. This can exhaust available memory and crash the BEAM VM (the Erlang Virtual Machine). Any application accepting user-supplied decimal input for arithmetic, rounding, integer conversion, or string formatting is exposed, as a single malicious request can cause an out-of-memory crash. **Recommendations** Update to version 3.0.0 or later.