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CVE-2026-75870：詳細資料

CVE-2026-75870

2026-08-22
13h35 +00:00
2026-08-25
19h28 +00:00
CVE.org
NVD
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CVE 描述

Punk versions before 0.18 for Perl allow session cookie forgery via an empty default HMAC key when a session is declared without a secret

Punk versions before 0.18 for Perl allow session cookie forgery via an empty default HMAC key when a session is declared without a secret. The session keyword freezes its options onto the application as given: it does not require a secret, warn, or refuse to start when one is absent. The cookie read and the write-back both default that key to the empty string, so a declaration with no secret option, or with an undefined or empty one, signs and verifies with a zero-length HMAC-SHA256 key. An attacker who knows the cookie format can then mint one offline carrying any contents the session holds, such as a user identifier or a role. Nothing marks the misconfiguration at runtime: cookies are well formed and sessions round-trip as expected.

CVE 解決方案

Upgrade to Punk 0.18 or later.

CVE 資訊

相關弱點

CWE-ID 弱點名稱 來源
CWE-1394 Use of Default Cryptographic Key
The product uses a default cryptographic key for potentially critical functionality.

參考資料

cvefind.com 上呈現的資訊來自多個精心挑選的參考來源。CVE 資料由 MITRE Corporation 和 國家漏洞資料庫（NVD）提供。已知被利用漏洞（KEV）目錄來自 網路安全暨基礎設施安全局（CISA），而 EPSS 評分來自 FIRST.org。此外，軟體弱點（CWE）和常見攻擊模式（CAPEC）的資料由 MITRE Corporation 維護，硬軟體配置（CPE）資訊由 NVD 提供。