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CVE-2021-37713— node-tar 路径遍历漏洞

一分钟漏洞结论

影响对象
npm node-tar
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。

node-tar是一款用于文件压缩/解压缩的软件包。 node-tar 存在路径遍历漏洞，该漏洞源于4.4.18、5.0.10和6.1.9之前的npm包“tar”(又名node-tar)存在任意文件创建覆盖和任意代码执行漏洞。攻击者可利用该漏洞访问受限目录之外的位置。

CVSS 8.2 · High EPSS 1.27% · P69
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一、 漏洞 CVE-2021-37713 基础信息

漏洞信息
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Vulnerability Title
Arbitrary File Creation/Overwrite on Windows via insufficient relative path sanitization
来源: CVE Program / CVE List V5
Vulnerability Description
The npm package "tar" (aka node-tar) before versions 4.4.18, 5.0.10, and 6.1.9 has an arbitrary file creation/overwrite and arbitrary code execution vulnerability. node-tar aims to guarantee that any file whose location would be outside of the extraction target directory is not extracted. This is, in part, accomplished by sanitizing absolute paths of entries within the archive, skipping archive entries that contain `..` path portions, and resolving the sanitized paths against the extraction target directory. This logic was insufficient on Windows systems when extracting tar files that contained a path that was not an absolute path, but specified a drive letter different from the extraction target, such as `C:some\path`. If the drive letter does not match the extraction target, for example `D:\extraction\dir`, then the result of `path.resolve(extractionDirectory, entryPath)` would resolve against the current working directory on the `C:` drive, rather than the extraction target directory. Additionally, a `..` portion of the path could occur immediately after the drive letter, such as `C:../foo`, and was not properly sanitized by the logic that checked for `..` within the normalized and split portions of the path. This only affects users of `node-tar` on Windows systems. These issues were addressed in releases 4.4.18, 5.0.10 and 6.1.9. The v3 branch of node-tar has been deprecated and did not receive patches for these issues. If you are still using a v3 release we recommend you update to a more recent version of node-tar. There is no reasonable way to work around this issue without performing the same path normalization procedures that node-tar now does. Users are encouraged to upgrade to the latest patched versions of node-tar, rather than attempt to sanitize paths themselves.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
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
node-tar 路径遍历漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
node-tar是一款用于文件压缩/解压缩的软件包。 node-tar 存在路径遍历漏洞，该漏洞源于4.4.18、5.0.10和6.1.9之前的npm包“tar”(又名node-tar)存在任意文件创建覆盖和任意代码执行漏洞。攻击者可利用该漏洞访问受限目录之外的位置。
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
npm node-tar < 4.4.18 -

二、漏洞 CVE-2021-37713 的公开POC

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三、漏洞 CVE-2021-37713 的情报信息

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CVE-2021-37713 厂商安全公告 (3)

CVE-2021-37713 其他参考 (1)

同批安全公告 · npm · 2021-08-31 · 共 5 条

CVE-2021-37701 8.2 HIGH node-tar 后置链接漏洞
CVE-2021-37712 8.2 HIGH node-tar 后置链接漏洞
CVE-2021-39134 8.2 HIGH NPM arborist 后置链接漏洞
CVE-2021-39135 8.2 HIGH NPM arborist 后置链接漏洞

IV. Related Vulnerabilities

Same product: node-tar
Same vendor: npm
Same weakness: CWE-22

V. Comments for CVE-2021-37713

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