Affected: zip-rs zip2

zip is a zip library for Rust that supports reading and writing simple ZIP files. From 1.3.0 until 9.0.0, ZipArchive::extract in src/read/mod.rs calls Vec::with_capacity for a symbolic link target using the attacker-controlled ZIP64 uncompressed_size before reading entry data. A small archive can request an impossible capacity, causing the infallible allocation path to abort the process before the entry is validated. The failure cannot be contained with catch_unwind or a worker thread, allowing repeated denial of service in archive-processing applications. This issue is fixed in version 9.0.0.

Affected: crates.io: zip

### Summary

The symbolic-link branch of `ZipArchive::extract_internal()` allocates a buffer using an attacker-declared size before reading any entry data. A 112-byte archive terminates the extracting process with `SIGABRT` through this infallible allocation.

### Details

```rust #[cfg(any(unix, windows))] if file.is_symlink() { let mut target = Vec::with_capacity(file.size() as usize); // @audit unbounded memory allocation file.read_to_end(&mut target)?; drop(file); make_symlink(&outpath, &target, &self.shared.files)?; continue; } ```

[`src/read/mod.rs#L399-L405`](https://github.com/zip-rs/zip2/blob/6f09b3064ec87c3a69ea9f3413f9f9638b4aa446/src/read/mod.rs#L399-L405) (reviewed commit `6f09b306`); the same code is at [`src/read.rs#L417-L418`](https://github.com/zip-rs/zip2/blob/v8.6.0/src/read.rs#L417-L418) in released v8.6.0.

Both inputs are attacker-controlled:

- [`ZipFile::size()`](https://github.com/zip-rs/zip2/blob/6f09b3064ec87c3a69ea9f3413f9f9638b4aa446/src/read/zipfile.rs#L243-L246) returns `uncompressed_size` verbatim from the central directory record. A ZIP64 extended-information extra field widens it to a full `u64` ([`src/read/mod.rs#L619-L625`](https://github.com/zip-rs/zip2/blob/6f09b3064ec87c3a69ea9f3413f9f9638b4aa446/src/read/mod.rs#L619-L625)). It is never cross-checked against the compressed size, the remaining archive length, or any platform-appropriate bound for a symlink target. - [`ZipFile::is_symlink()`](https://github.com/zip-rs…