VDB-96298 · CVE-2016-2402 · Nessus 89558

OkHttp up to 2.7.3/3.1.1 Certificate certificate validation

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.5	$0-$5k	0.00

Summaryinfo

A vulnerability was found in OkHttp up to 2.7.3/3.1.1. It has been declared as critical. This issue affects some unknown processing of the component Certificate Handler. Executing a manipulation can lead to certificate validation. This vulnerability appears as CVE-2016-2402. The attack may be performed from remote. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in OkHttp up to 2.7.3/3.1.1. It has been declared as critical. This vulnerability affects some unknown processing of the component Certificate Handler. The manipulation with an unknown input leads to a certificate validation vulnerability. The CWE definition for the vulnerability is CWE-295. The product does not validate, or incorrectly validates, a certificate. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

OkHttp before 2.7.4 and 3.x before 3.1.2 allows man-in-the-middle attackers to bypass certificate pinning by sending a certificate chain with a certificate from a non-pinned trusted CA and the pinned certificate.

The bug was discovered 02/11/2016. The weakness was presented 01/30/2017 (Website). The advisory is available at openwall.com. This vulnerability was named CVE-2016-2402 since 02/17/2016. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1587.003 by the MITRE ATT&CK project.

The vulnerability was handled as a non-public zero-day exploit for at least 18 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 89558 (Fedora 23 : okhttp-2.7.4-1.fc23 / okio-1.6.0-1.fc23 (2016-65b7608d8b)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 124825 (Fedora Security Update for okhttp (FEDORA-2016-65b7608d8b)).

Upgrading to version 2.7.4 or 3.1.2 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (89558) and CERT Bund (WID-SEC-2022-0770). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

IBM DB2
Red Hat Enterprise Linux
IBM SPSS
EMC Avamar
Hitachi Ops Center

Productinfo

Name

OkHttp

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.5

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
NVD Vector: 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Certificate validation
CWE: CWE-295 / CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 89558
Nessus Name: Fedora 23 : okhttp-2.7.4-1.fc23 / okio-1.6.0-1.fc23 (2016-65b7608d8b)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703099
OpenVAS Name: Fedora Update for okhttp FEDORA-2016-65
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: OkHttp 2.7.4/3.1.2

Timelineinfo

02/11/2016 🔍
02/17/2016 +6 days 🔍
02/29/2016 +12 days 🔍
03/04/2016 +4 days 🔍
01/30/2017 +332 days 🔍
01/30/2017 +0 days 🔍
01/31/2017 +1 days 🔍
01/11/2026 +3267 days 🔍