Update dependency tar-fs to v2.1.4 [SECURITY]

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
tar-fs	2.0.0 → 2.1.4

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tar-fs Vulnerable to Link Following and Path Traversal via Extracting a Crafted tar File

CVE-2024-12905 / GHSA-pq67-2wwv-3xjx

More information

Details

An Improper Link Resolution Before File Access ("Link Following") and Improper Limitation of a Pathname to a Restricted Directory ("Path Traversal"). This vulnerability occurs when extracting a maliciously crafted tar file, which can result in unauthorized file writes or overwrites outside the intended extraction directory. The issue is associated with index.js in the tar-fs package.

This issue affects tar-fs: from 0.0.0 before 1.16.4, from 2.0.0 before 2.1.2, from 3.0.0 before 3.0.7.

PoC

// Create a writable stream to extract the tar content
const extractStream = tarfs.extract('/', {
    // We can ignore the file type checks to allow the extraction of the malicious file
    ignore: (name) => false,
});

// Create a tar stream
const tarStream = tarfs.pack().on('error', (err) => {
    throw err;
});

// Append the malicious entry to the tar stream
tarStream.entry({ name: '/flag.txt', mode: 0o644 }, Buffer.from('This is a flag!'));

// Finalize the tar stream
tarStream.finalize();

// Pipe the tar stream into the extract stream
tarStream.pipe(extractStream);

Severity

• CVSS Score: 7.5 / 10 (High)
• Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References

• https://nvd.nist.gov/vuln/detail/CVE-2024-12905
• https://github.com/mafintosh/tar-fs/commit/a1dd7e7c7f4b4a8bd2ab60f513baca573b44e2ed
• https://arxiv.org/abs/2506.04962
• https://arxiv.org/pdf/2506.04962
• https://lists.debian.org/debian-lts-announce/2025/06/msg00012.html
• https://www.seal.security/blog/a-link-to-the-past-uncovering-a-new-vulnerability-in-tar-fs
• https://github.com/advisories/GHSA-pq67-2wwv-3xjx

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

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tar-fs can extract outside the specified dir with a specific tarball

CVE-2025-48387 / GHSA-8cj5-5rvv-wf4v

More information

Details

Impact

v3.0.8, v2.1.2, v1.16.4 and below

Patches

Has been patched in 3.0.9, 2.1.3, and 1.16.5

Workarounds

You can use the ignore option to ignore non files/directories.

  ignore (_, header) {
    // pass files & directories, ignore e.g. symlinks
    return header.type !== 'file' && header.type !== 'directory'
  }

Credit

Thank you Caleb Brown from Google Open Source Security Team for reporting this in detail.

Severity

• CVSS Score: 8.7 / 10 (High)
• Vector String: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

References

• https://github.com/mafintosh/tar-fs/security/advisories/GHSA-8cj5-5rvv-wf4v
• https://nvd.nist.gov/vuln/detail/CVE-2025-48387
• https://github.com/mafintosh/tar-fs/commit/647447b572bc135c41035e82ca7b894f02b17f0f
• https://github.com/google/security-research/security/advisories/GHSA-xrg4-qp5w-2c3w
• https://lists.debian.org/debian-lts-announce/2025/06/msg00012.html
• https://github.com/advisories/GHSA-8cj5-5rvv-wf4v

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

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tar-fs has a symlink validation bypass if destination directory is predictable with a specific tarball

CVE-2025-59343 / GHSA-vj76-c3g6-qr5v

More information

Details

Impact

v3.1.0, v2.1.3, v1.16.5 and below

Patches

Has been patched in 3.1.1, 2.1.4, and 1.16.6

Workarounds

You can use the ignore option to ignore non files/directories.

  ignore (_, header) {
    // pass files & directories, ignore e.g. symlinks
    return header.type !== 'file' && header.type !== 'directory'
  }

Credit

Reported by: Mapta / BugBunny_ai

Severity

• CVSS Score: 8.7 / 10 (High)
• Vector String: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

References

• https://github.com/mafintosh/tar-fs/security/advisories/GHSA-vj76-c3g6-qr5v
• https://nvd.nist.gov/vuln/detail/CVE-2025-59343
• https://github.com/mafintosh/tar-fs/commit/0bd54cdf06da2b7b5b95cd4b062c9f4e0a8c4e09
• https://lists.debian.org/debian-lts-announce/2025/09/msg00028.html
• https://github.com/advisories/GHSA-vj76-c3g6-qr5v

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

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Release Notes

mafintosh/tar-fs (tar-fs)

v2.1.4

Compare Source

v2.1.3

Compare Source

v2.1.2

Compare Source

v2.1.1

Compare Source

v2.1.0

Compare Source

v2.0.1

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