安全研究
CVE-2023-49103 + CVE-2023-49105 ownCloud 信息泄漏 + 权限提升到 RCE 链：PHPinfo 暴露如何成为攻击者的钥匙
Thinking
2023-11-15
4 分钟阅读
研究档案
#漏洞分析#代码审计#Web安全
ownCloud 在 /settings/phpinfo 等少数端点暴露完整 PHPinfo 页面（CVSS 10），同时 WebDAV 处理的 URL 签名在用户未配置签名密钥时默认为空字符串，让攻击者能用任意用户名伪造请求（CVSS 9.8）——两个 CVE 组合形成完整攻击链：PHPinfo 暴露拿到 ImageMagick / GraphQL 信息 → WebDAV 签名伪造伪装任意用户 → 旧版 ImageMagick 漏洞触发 RCE。
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