VDB-79874 · CVE-2015-7756 · BID 79626

Juniper ScreenOS cryptographic issues

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.

A vulnerability was found in Juniper ScreenOS (Router Operating System) (the affected version is unknown). It has been rated as critical. Affected by this issue is an unknown code. The manipulation with an unknown input leads to a cryptographic issues vulnerability. Using CWE to declare the problem leads to CWE-310. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The encryption implementation in Juniper ScreenOS 6.2.0r15 through 6.2.0r18, 6.3.0r12 before 6.3.0r12b, 6.3.0r13 before 6.3.0r13b, 6.3.0r14 before 6.3.0r14b, 6.3.0r15 before 6.3.0r15b, 6.3.0r16 before 6.3.0r16b, 6.3.0r17 before 6.3.0r17b, 6.3.0r18 before 6.3.0r18b, 6.3.0r19 before 6.3.0r19b, and 6.3.0r20 before 6.3.0r21 makes it easier for remote attackers to discover the plaintext content of VPN sessions by sniffing the network for ciphertext data and conducting an unspecified decryption attack.

The weakness was shared 12/19/2015 (Website). The advisory is available at github.com. This vulnerability is handled as CVE-2015-7756 since 10/08/2015. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1600 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 87507 (Juniper ScreenOS 6.2.x < 6.2.0r19 / 6.3.x < 6.3.0r21 Multiple Vulnerabilities (JSA10713)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Firewalls and running in the context l.

Upgrading eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (87507). The entries 79855 and 79856 are related to this item.






  • commercial

CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

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



VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍


Class: Cryptographic issues
CWE: CWE-310
ATT&CK: T1600

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 87507
Nessus Name: Juniper ScreenOS 6.2.x < 6.2.0r19 / 6.3.x < 6.3.0r21 Multiple Vulnerabilities (JSA10713)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 802738
OpenVAS Name: Multiple Security issues with ScreenOS (JSA10713)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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


Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍


10/08/2015 🔍
12/17/2015 +70 days 🔍
12/17/2015 +0 days 🔍
12/17/2015 +0 days 🔍
12/18/2015 +1 days 🔍
12/19/2015 +1 days 🔍
12/19/2015 +0 days 🔍
12/20/2015 +1 days 🔍
12/22/2015 +2 days 🔍
07/01/2022 +2383 days 🔍


Vendor: juniper.net

Advisory: github.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-7756 (🔍)
SecurityTracker: 1034489
Vulnerability Center: 55337 - Juniper ScreenOS <6.2.0r18, <6.3.0r21 Remote VPN Traffic Decryption, Critical
SecurityFocus: 79626 - Juniper ScreenOS CVE-2015-7755 Unauthorized Access and Information Disclosure Vulnerabilities

See also: 🔍


Created: 12/22/2015 10:17 AM
Updated: 07/01/2022 01:24 PM
Changes: 12/22/2015 10:17 AM (61), 06/19/2018 09:01 PM (9), 07/01/2022 01:24 PM (3)
Complete: 🔍


No comments yet. Languages: en.

Please log in to comment.

Do you know our Splunk app?

Download it now for free!