SARA / Free Tools / CVE / CVE-2022-41720

CVE-2022-41720 — On Windows, restricted files can be accessed via os

On Windows, restricted files can be accessed via os.DirFS and http.Dir. The os.DirFS function and http.Dir type provide access to a tree of files rooted at a given directory. These functions permit access to Windows device files under that root. For example, os.DirFS("C:/tmp

CVSS
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EPSS
0.03% (top 90.20%)
CWE
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Published
2022-12-07T16:11:18.867Z
Last modified
2025-04-23T15:43:46.208Z
CVSS vector
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01What is this vulnerability?

On Windows, restricted files can be accessed via os.DirFS and http.Dir. The os.DirFS function and http.Dir type provide access to a tree of files rooted at a given directory. These functions permit access to Windows device files under that root. For example, os.DirFS("C:/tmp").Open("COM1") opens the COM1 device. Both os.DirFS and http.Dir only provide read-only filesystem access. In addition, on…

02Affected products

VendorProductVersions
Go standard libraryos0, 1.19.0-0
Go standard librarynet/http0, 1.19.0-0

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

09References

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