CVE intelligence and bounded remediation

CVE-2023-0593 — A path traversal vulnerability affects yaffshiv YAFFS filesystem extractor

Medium CVSS 5.5

A path traversal vulnerability affects yaffshiv YAFFS filesystem extractor. By crafting a malicious YAFFS file, an attacker could force yaffshiv to write outside of the extraction directory. This issue affects yaffshiv up to version 0.1 included, which is the most recent at time of publication.

Severity
Medium
CVSS
5.5 (3.1)
Published
2023-01-31
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-22

Affected products

  • yaffshiv_project / yaffshiv

Matched remediation archetype

Path traversal, unsafe upload, and file handling

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Check exposure

  • Trace untrusted filenames, archive entries, URLs, and path segments into read, write, include, extraction, and upload operations.
  • Identify filesystem roots, mount permissions, symbolic-link behavior, archive handling, and whether uploaded content is web-accessible or executable.
  • Review canonicalization and containment checks across supported operating systems and storage backends.

Remediate safely

  • Generate server-side storage identifiers and resolve paths beneath a fixed root using filesystem-aware containment checks.
  • Reject absolute, parent-relative, alternate-separator, device, link, and archive entries that escape the intended root.
  • Store uploads outside executable or served paths, validate type and size, and use private atomic temporary files.

Authoritative sources

Complete CVE record and remediation plan

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