oppia通过差异性导致的信息暴露漏洞(CVE-2023-40021)
CVE编号
CVE-2023-40021利用情况
暂无补丁情况
N/A披露时间
2023-08-17漏洞描述
Oppia is an online learning platform. When comparing a received CSRF token against the expected token, Oppia uses the string equality operator (`==`), which is not safe against timing attacks. By repeatedly submitting invalid tokens, an attacker can brute-force the expected CSRF token character by character. Once they have recovered the token, they can then submit a forged request on behalf of a logged-in user and execute privileged actions on that user's behalf. In particular the function to validate received CSRF tokens is at `oppia.core.controllers.base.CsrfTokenManager.is_csrf_token_valid`. An attacker who can lure a logged-in Oppia user to a malicious website can perform any change on Oppia that the user is authorized to do, including changing profile information; creating, deleting, and changing explorations; etc. Note that the attacker cannot change a user's login credentials. An attack would need to complete within 1 second because every second, the time used in computing the token changes. This issue has been addressed in commit `b89bf80837` which has been included in release `3.3.2-hotfix-2`. Users are advised to upgrade. There are no known workarounds for this vulnerability.解决建议
"将组件 oppia 升级至 3.3.2 及以上版本"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 | oppia | oppia | * | From (including) 1.1.0 | Up to (excluding) 3.3.2 | ||||
| 运行在以下环境 | |||||||||
| 应用 | oppia | oppia | 3.3.2 | - | |||||
- 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 无
- 完整性 高
| CWE-ID | 漏洞类型 |
| CWE-203 | 通过差异性导致的信息暴露 |
| CWE-208 | 通过时间差异性导致的信息暴露 |
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