apt prior 1.0.9.8.4/1.4~beta2 Signature Validation path error

CVSS Meta Temp Score
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CTI Interest Score
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6.9$0-$5k0.00

A vulnerability was found in apt. It has been declared as critical. Affected by this vulnerability is an unknown code block of the component Signature Validation. The manipulation with an unknown input leads to a path error vulnerability. The CWE definition for the vulnerability is CWE-417. As an impact it is known to affect confidentiality, integrity, and availability.

The bug was discovered 12/05/2016. The weakness was released 12/13/2016 by Jann Horn as DSA 3733-1 as confirmed posting (Mailing List). The advisory is shared at lists.debian.org. The public release was coordinated with the project team. This vulnerability is known as CVE-2016-1252 since 12/27/2015. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details are unknown but a public exploit is available. The advisory points out:

ann Horn of Google Project Zero discovered that APT, the high level package manager, does not properly handle errors when validating signatures on InRelease files. An attacker able to man-in-the-middle HTTP requests to an apt repository that uses InRelease files (clearsigned Release files), can take advantage of this flaw to circumvent the signature of the InRelease file, leading to arbitrary code execution.

It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 8 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 95808 (Ubuntu 14.04 LTS / 16.04 LTS / 16.10 : apt vulnerability (USN-3156-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l.

Upgrading to version 1.0.9.8.4 or 1.4~beta2 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (95808) and Exploit-DB (40916).

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 6.9

VulDB Base Score: 8.8
VulDB Temp Score: 7.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Path error
CWE: CWE-417
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 95808
Nessus Name: Ubuntu 14.04 LTS / 16.04 LTS / 16.10 : apt vulnerability (USN-3156-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 841810
OpenVAS Name: Ubuntu Update for apt USN-3156-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: apt 1.0.9.8.4/1.4~beta2

Timelineinfo

12/27/2015 🔍
12/05/2016 +344 days 🔍
12/13/2016 +8 days 🔍
12/13/2016 +0 days 🔍
12/14/2016 +1 days 🔍
12/16/2016 +2 days 🔍
12/05/2017 +354 days 🔍
10/12/2022 +1772 days 🔍

Sourcesinfo

Advisory: DSA 3733-1
Researcher: Jann Horn
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2016-1252 (🔍)
OVAL: 🔍
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 12/16/2016 17:07
Updated: 10/12/2022 08:52
Changes: 12/16/2016 17:07 (74), 07/09/2019 16:15 (7), 10/12/2022 08:52 (4)
Complete: 🔍

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