CVE-2021-21300— Git 后置链接漏洞
公开利用映射 1
Metasploit · 1 git_lfs_clone_command_exec.rb [exploit]
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一、 漏洞 CVE-2021-21300 基础信息
漏洞信息
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Vulnerability Title
malicious repositories can execute remote code while cloning
来源: CVE Program / CVE List V5
Vulnerability Description
Git is an open-source distributed revision control system. In affected versions of Git a specially crafted repository that contains symbolic links as well as files using a clean/smudge filter such as Git LFS, may cause just-checked out script to be executed while cloning onto a case-insensitive file system such as NTFS, HFS+ or APFS (i.e. the default file systems on Windows and macOS). Note that clean/smudge filters have to be configured for that. Git for Windows configures Git LFS by default, and is therefore vulnerable. The problem has been patched in the versions published on Tuesday, March 9th, 2021. As a workaound, if symbolic link support is disabled in Git (e.g. via `git config --global core.symlinks false`), the described attack won't work. Likewise, if no clean/smudge filters such as Git LFS are configured globally (i.e. _before_ cloning), the attack is foiled. As always, it is best to avoid cloning repositories from untrusted sources. The earliest impacted version is 2.14.2. The fix versions are: 2.30.1, 2.29.3, 2.28.1, 2.27.1, 2.26.3, 2.25.5, 2.24.4, 2.23.4, 2.22.5, 2.21.4, 2.20.5, 2.19.6, 2.18.5, 2.17.62.17.6.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
在文件访问前对链接解析不恰当(链接跟随)
来源: CVE Program / CVE List V5
Vulnerability Title
Git 后置链接漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Git是一套免费、开源的分布式版本控制系统。 Git 存在后置链接漏洞，该漏洞允许攻击者利用特别制作的存储库导致just-checked脚本执行而克隆到一个不区分大小写的文件系统。
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
二、漏洞 CVE-2021-21300 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|---|---|---|
| 1 | None | https://github.com/AlkenePan/CVE-2021-21300 | POC详情 |
| 2 | None | https://github.com/Faisal78123/CVE-2021-21300 | POC详情 |
| 3 | None | https://github.com/erranfenech/CVE-2021-21300 | POC详情 |
| 4 | None | https://github.com/Maskhe/CVE-2021-21300 | POC详情 |
| 5 | remote code exec for git | https://github.com/1uanWu/CVE-2021-21300 | POC详情 |
| 6 | None | https://github.com/Kirill89/CVE-2021-21300 | POC详情 |
| 7 | None | https://github.com/ETOCheney/cve-2021-21300 | POC详情 |
| 8 | None | https://github.com/fengzhouc/CVE-2021-21300 | POC详情 |
| 9 | None | https://github.com/danshuizhangyu/CVE-2021-21300 | POC详情 |
| 10 | None | https://github.com/0ahu/CVE-2021-21300 | POC详情 |
| 11 | None | https://github.com/Jiang59991/cve-2021-21300 | POC详情 |
| 12 | None | https://github.com/Jiang59991/cve-2021-21300-plus | POC详情 |
| 13 | None | https://github.com/macilin/CVE-2021-21300 | POC详情 |
| 14 | the payload of CVE-2021-21300 | https://github.com/Roboterh/CVE-2021-21300 | POC详情 |
| 15 | CVE-2021-21300 | https://github.com/henry861010/Network_Security_NYCU | POC详情 |
| 16 | None | https://github.com/Saboor-Hakimi-23/CVE-2021-21300 | POC详情 |
| 17 | None | https://github.com/Threekiii/Awesome-POC/blob/master/%E5%85%B6%E4%BB%96%E6%BC%8F%E6%B4%9E/Git%20for%20Visual%20Studio%E8%BF%9C%E7%A8%8B%E6%89%A7%E8%A1%8C%E4%BB%A3%E7%A0%81%E6%BC%8F%E6%B4%9E%20CVE-2021-21300.md | POC详情 |
| 18 | None | https://github.com/Sizvy/CVE-2021-21300 | POC详情 |
| 19 | CVE-2021-21300 test | https://github.com/the-chivalrousZ/cve-2021-21300 | POC详情 |
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CVE-2021-21300 补丁与修复 (1)
CVE-2021-21300 厂商安全公告 (3)
- https://security.gentoo.org/glsa/202104-01vendor-advisory
CVE-2021-21300 公开利用代码 (1)
CVE-2021-21300 邮件列表归档 (6)
- http://seclists.org/fulldisclosure/2021/Apr/60mailing-list
CVE-2021-21300 其他参考 (3)
IV. Related Vulnerabilities
V. Comments for CVE-2021-21300
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