RUSTSEC-2026-0348: Brotli certificate decompression can allocate up to 1 GiB before authentication

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評估

難度
2/5
預估耗時
1-3 小時
新手友好度
40/100
Issue 類型
缺陷
描述清晰度
基本清楚
活躍度
活躍
技術堆疊
rust
領域
security

研究方向

The vulnerable crate is rustls 0.23.45, so start in Cargo.lock and the Cargo.toml that pulls it in. Run cargo tree -i rustls -e features to check whether the brotli feature is enabled anywhere in the graph. Then bump rustls to at least 0.23.46 with cargo update -p rustls and confirm with cargo audit. Done when the lockfile resolves to a patched version and the build and tests still pass.

由索引模型根據 Issue 內容生成。

描述

Brotli certificate decompression can allocate up to 1 GiB before authentication

Details
Package rustls
Version 0.23.45
URL https://github.com/rustls/rustls/pull/3297
Date 2026-10-14
Patched versions >=0.23.46
Unaffected versions <0.23.9

The built-in Brotli certificate decompressor (enabled by the non-default
brotli crate feature) bounded the size of the decompressed output, but
accepted a peer-selected history window. Brotli's large-window extension was
enabled, so a five-byte header could cause an allocation of 1 GiB. A peer can
abort a process whose allocator cannot satisfy that request.

No trusted certificate is required by the attacker. Affected configurations are:

  • clients that enable the brotli feature and connect to a malicious server, and
  • servers that enable the brotli feature and request client certificates.

Applications that do not enable the brotli feature are not affected.

See advisory page for additional details.

主要語言
Rust
星號
11
分支
5
平均合併
1 天 6 小時
30 天內合併 PR
1

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  • 有 Pull Request 範本
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