CVE-2023-25815— Git for Windows 格式化字符串错误漏洞
一分钟漏洞结论
影响对象
git-for-windows git
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Git for Windows是Git的用于 Windows 的 Git。 Git for Windows 2.40.0版本及之前版本存在格式化字符串错误漏洞，该漏洞源于使用硬编码路径来查找本地化消息。
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一、 漏洞 CVE-2023-25815 基础信息
漏洞信息
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Vulnerability Title
Git looks for localized messages in the wrong place
来源: CVE Program / CVE List V5
Vulnerability Description
In Git for Windows, the Windows port of Git, no localized messages are shipped with the installer. As a consequence, Git is expected not to localize messages at all, and skips the gettext initialization. However, due to a change in MINGW-packages, the `gettext()` function's implicit initialization no longer uses the runtime prefix but uses the hard-coded path `C:\mingw64\share\locale` to look for localized messages. And since any authenticated user has the permission to create folders in `C:\` (and since `C:\mingw64` does not typically exist), it is possible for low-privilege users to place fake messages in that location where `git.exe` will pick them up in version 2.40.1.
This vulnerability is relatively hard to exploit and requires social engineering. For example, a legitimate message at the end of a clone could be maliciously modified to ask the user to direct their web browser to a malicious website, and the user might think that the message comes from Git and is legitimate. It does require local write access by the attacker, though, which makes this attack vector less likely. Version 2.40.1 contains a patch for this issue. Some workarounds are available. Do not work on a Windows machine with shared accounts, or alternatively create a `C:\mingw64` folder and leave it empty. Users who have administrative rights may remove the permission to create folders in `C:\`.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:L
来源: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
来源: CVE Program / CVE List V5
Vulnerability Title
Git for Windows 格式化字符串错误漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Git for Windows是Git的用于 Windows 的 Git。 Git for Windows 2.40.0版本及之前版本存在格式化字符串错误漏洞，该漏洞源于使用硬编码路径来查找本地化消息。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| git-for-windows | git | < 2.40.1 | - |
|
二、漏洞 CVE-2023-25815 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2023-25815 补丁与修复 (1)
-
https://github.com/msys2/MINGW-packages/pull/10461 x_refsource_MISC
CVE-2023-25815 厂商安全公告 (2)
-
https://github.com/git-for-windows/git/security/advisories/GHSA-9w66-8mq8-5vm8 x_refsource_CONFIRM
CVE-2023-25815 邮件列表归档 (5)
CVE-2023-25815 安全博客文章 (1)
CVE-2023-25815 其他参考 (2)
同批安全公告 · git-for-windows · 2023-04-25 · 共 3 条
| CVE-2023-29011 | 7.6 HIGH | Git for Windows 代码问题漏洞 |
| CVE-2023-29012 | 7.3 HIGH | Git for Windows 代码问题漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2023-25815
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