CVE-2026-42304
Twisted has a Denial of Service (DoS) in twisted.names via Crafted DNS Compression Pointer Chains
描述
Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.4.0rc2, the twisted.names module is vulnerable to a Denial of Service (DoS) attack via resource exhaustion during DNS name decompression. A remote, unauthenticated attacker can exploit this by sending a crafted TCP DNS packet containing deeply chained compression pointers. This flaw bypasses previous loop-prevention logic, causing the single-threaded Twisted reactor to hang while processing millions of recursive lookups, effectively freezing the server. This vulnerability is fixed in 26.4.0rc2.
如何修補 CVE-2026-42304
要修補 CVE-2026-42304,請將受影響套件升級到下列已修補版本。
- —未列出修補版本
- —升級至 26.4.0rc2 或更新版本
- —升級至 26.4.0 或更新版本
CVE-2026-42304 正在被利用嗎?
低 — EPSS 為 0.4%,目前沒有觀察到大規模利用活動。
受影響套件(3)
- from 0
- from 0, < 26.4.0rc2
- from 0, < 26.4.0
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |