CVE-2026-59099 漏洞深度分析

漏洞概述

CVE 编号： CVE-2026-59099
CVSS 评分： 9.3（CRITICAL）
CVSS 向量： CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE 分类： CWE-323
漏洞状态： Awaiting Analysis
发布时间： 2026-07-02T20:17:08.240
最后更新： 2026-07-14T23:17:33.830

漏洞描述

Apereo CAS 7.3.0 before 8.0.0-RC6 contains a cryptographic vulnerability that allows remote unauthenticated attackers to recover plaintext conversation state by exploiting AES-GCM initialization vector reuse across the server lifetime. Attackers can collect multiple client-side webflow execution tokens from the unauthenticated login page and perform known-plaintext analysis to decrypt the webflow conversation state due to keystream reuse caused by a fixed all-zero IV paired with the same encryption key.

影响分析

此漏洞的具体影响取决于实际利用场景。"

修复建议

1. 及时关注厂商发布的安全更新和补丁
2. 升级受影响组件到最新版本
3. 如无法立即升级，参考厂商提供的临时缓解措施
4. 加强网络访问控制和监控

参考链接

1. https://apereo.github.io/2026/06/18/vuln/
2. https://github.com/apereo/cas/commit/22c6f4adf738852782309b523b4e80371057f2d0
3. https://github.com/apereo/cas/releases/tag/v8.0.0-RC6
4. https://github.com/geo-chen/oss/blob/main/cas.md
5. https://www.vulncheck.com/advisories/apereo-cas-rc6-aes-gcm-nonce-reuse-information-disclosure