7.5high
CVE-2018-20835
Improper Input Validation in tar-fs
Also known as GHSA-x2mc-8fgj-3wmr
Published 7 y ago · modified 4 mo ago · JSON
CVSS
7.5
v3.0 · NVD
CISA KEV
No
not known exploited
EPSS
2.4%
percentile 84%
Public exploits
0
none known
Summary
A vulnerability was found in tar-fs before 1.16.2. An Arbitrary File Overwrite issue exists when extracting a tarball containing a hardlink to a file that already exists on the system, in conjunction with a later plain file with the same name as the hardlink. This plain file content replaces the existing file content.
Exploit prediction (EPSS)
2.36% probability of exploitation in the next 30 days, higher than 84% of all scored CVEs.
CVSS scores
| Assigned by | Version | Score | Vector |
|---|---|---|---|
| NVD | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| NVD | 2.0 | 6.4 | AV:N/AC:L/Au:N/C:N/I:P/A:P |
| GitHub | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | tar-fs | <1.16.2 | 1.16.2 |
Classification
- Weakness
- CWE-20 Improper Input Validation
References
- hackerone.com /reports/344595 · x_refsource_MISC, x_transferred
- github.com /mafintosh/tar-fs/commit/06672828e6fa29ac8551b1b6f36c852a9a3c58a2 · x_refsource_MISC, x_transferred
- github.com /mafintosh/tar-fs/compare/d590fc7...a35ce2f · x_refsource_MISC, x_transferred
- nvd.nist.gov /vuln/detail/CVE-2018-20835 · advisory
Sources
- CVE List: CVE-2018-20835
- GitHub Advisory: GHSA-x2mc-8fgj-3wmr
- NVD: CVE-2018-20835
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