Mmastrac

The issue arises when `ssl::select next proto` returns a slice pointing into the `server` argument's buffer but with a lifetime bound to the `client` argument. If the `server` buffer's lifetime is shorter than the `client` buffer's, this can cause a use after free, potentially leading to the server crashing or returning arbitrary memory contents to the client. The function `ssl::select next proto` is typically used in the callback passed to `SslContextBuilder::set alpn select callback`. Code is only affected if the `server` buffer is constructed within the callback.

The Deno sandbox may be unexpectedly weakened by allowing file read/write access to privileged files in various locations on Unix and Windows platforms. For example, reading `/proc/self/environ` may provide access equivalent to `--allow-env`, and writing `/proc/self/mem` may provide access equivalent to `--allow-all`. Users who grant read and write access to the entire filesystem may not realize that these accesses to these files may have additional, unintended consequences.

A vulnerability in Deno's Node.js compatibility runtime allows for cross-session data contamination during simultaneous asynchronous reads from Node.js streams sourced from sockets or files. This issue arises from the re-use of a global buffer (`BUF`) in `stream wrap.ts` used as a performance optimization to limit allocations during these asynchronous read operations. The vulnerability can lead to data intended for one session being received by another session, potentially resulting in data corruption and unexpected behavior. This affects all users of Deno that use the node.js compatibility layer for network communication or other streams, including packages that may require node.js libraries indirectly.