正文

ledgersmb ledgersmb 敏感数据加密缺失

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CVE编号

CVE-2021-3882

利用情况

暂无

补丁情况

N/A

披露时间

2021-10-14
漏洞描述
LedgerSMB does not set the 'Secure' attribute on the session authorization cookie when the client uses HTTPS and the LedgerSMB server is behind a reverse proxy. By tricking a user to use an unencrypted connection (HTTP), an attacker may be able to obtain the authentication data by capturing network traffic. LedgerSMB 1.8 and newer switched from Basic authentication to using cookie authentication with encrypted cookies. Although an attacker can't access the information inside the cookie, nor the password of the user, possession of the cookie is enough to access the application as the user from which the cookie has been obtained. In order for the attacker to obtain the cookie, first of all the server must be configured to respond to unencrypted requests, the attacker must be suitably positioned to eavesdrop on the network traffic between the client and the server *and* the user must be tricked into using unencrypted HTTP traffic. Proper audit control and separation of duties limit Integrity impact of the attack vector. Users of LedgerSMB 1.8 are urged to upgrade to known-fixed versions. Users of LedgerSMB 1.7 or 1.9 are unaffected by this vulnerability and don't need to take action. As a workaround, users may configure their Apache or Nginx reverse proxy to add the Secure attribute at the network boundary instead of relying on LedgerSMB. For Apache, please refer to the 'Header always edit' configuration command in the mod_headers module. For Nginx, please refer to the 'proxy_cookie_flags' configuration command.
解决建议
建议您更新当前系统或软件至最新版，完成漏洞的修复。
参考链接
https://github.com/ledgersmb/ledgersmb/commit/c242f5a2abf4b99b0da205473cbba03...
https://huntr.dev/bounties/7061d97a-98a5-495a-8ba0-3a4c66091e9d
https://ledgersmb.org/cve-2021-3882-sensitive-non-secure-cookie
受影响软件情况
# 类型 厂商 产品 版本 影响面
1
运行在以下环境
应用 ledgersmb ledgersmb 1.8.0 -
CVSS3评分 6.8
  • 攻击路径 网络
  • 攻击复杂度 高
  • 权限要求 无
  • 影响范围 未更改
  • 用户交互 需要
  • 可用性 无
  • 保密性 高
  • 完整性 高
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N CWE-ID 漏洞类型 CWE-311 敏感数据加密缺失