Attacker Value
Very High
(1 user assessed)
Exploitability
Very High
(1 user assessed)
User Interaction
Unknown
Privileges Required
Unknown
Attack Vector
Unknown
0

CVE-2015-7755

Disclosure Date: December 19, 2015 •
CVE-2015-7755
Add MITRE ATT&CK tactics and techniques that apply to this CVE.
Metasploit Module

Description

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 allows remote attackers to obtain administrative access by entering an unspecified password during a (1) SSH or (2) TELNET session.

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1
Ratings
  • Attacker Value
    Very High
  • Exploitability
    Very High
Easy to weaponizeGives privileged accessUnauthenticatedVulnerable in default configuration
Technical Analysis

‘unspecified password’: <<< %s(un='%s') = %u.
This was a manufacturer backdoor account left on the device. Interestingly, when experts analyzed the OS Images, they assessed that the password for the backdoor account was created in a way that would look like an innocuous string when analyzed.
While Juniper isn’t very common on enterprise environments, especially running ScreenOS, they still existed in smaller satellite offices.

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CVSS V3 Severity and Metrics
Base Score:
None
Impact Score:
Unknown
Exploitability Score:
Unknown
Vector:
Unknown
Attack Vector (AV):
Unknown
Attack Complexity (AC):
Unknown
Privileges Required (PR):
Unknown
User Interaction (UI):
Unknown
Scope (S):
Unknown
Confidentiality (C):
Unknown
Integrity (I):
Unknown
Availability (A):
Unknown

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
n/a
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
auxiliary/scanner/ssh/juniper_backdoor
Reporter
Unknown

Vendors

  • juniper

Products

  • screenos 6.3.0
Technical Analysis