Repository Signing Bypass in Debian and Ubuntu
CVE-2016-1252

5.9MEDIUM

Key Information:

Vendor

Debian
Status
Advanced Package Tool
Vendor
CVE Published:
5 December 2017

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2016-1252?

The apt package in various versions of Debian and Ubuntu contains a vulnerability that allows man-in-the-middle attackers to bypass the protection mechanism for repository signing. This flaw stems from improper error handling during the validation of InRelease file signatures, potentially leading to unauthorized access to trusted repositories. Users are advised to upgrade to the latest versions of affected packages to mitigate the associated risks.

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Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2016-1252 - Proof of Concept

References

https://www.debian.org/security/2016/dsa-3733
vendor-advisoryx_refsource_DEBIAN
http://www.ubuntu.com/usn/USN-3156-1
vendor-advisoryx_refsource_UBUNTU
http://packetstormsecurity.com/files/140145/apt-Repositor...
x_refsource_MISC

EPSS Score

5% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
5.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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