CVE-2015-7755:Juniper ScreenOS versions 6.2.0r15 through 6.2.0r18 and 6.3.0r12 through 6.3.0r20 are vulnerable to unauthorized administrative access via SSH or TELNET sessions.

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Juniper ScreenOS versions 6.2.0r15 through 6.2.0r18, and 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 allow remote attackers to gain administrative access by entering an unspecified password during an SSH or TELNET session. This vulnerability poses a significant risk as it can lead to unauthorized control over the affected devices.

Overview

The vulnerability identified as CVE-2015-7755 affects specific versions of Juniper's ScreenOS, a network operating system used in various Juniper firewall products. The flaw allows remote attackers to exploit the system by entering an unspecified password during SSH or TELNET sessions, potentially granting them administrative access. This could lead to unauthorized actions being performed on the network devices, compromising the security and integrity of the network.

Remediation

To mitigate the risks associated with CVE-2015-7755, it is recommended that users of affected versions of Juniper ScreenOS upgrade to the latest patched versions. Specifically, users should update to:

  • 6.2.0r19 or later for the 6.2.x series
  • 6.3.0r12b or later for the 6.3.x series

Additionally, users should review their network security policies, disable unnecessary services, and implement strong password policies to further protect against unauthorized access.

References

  1. Ars Technica - Unauthorized code in Juniper firewalls decrypts encrypted VPN traffic
  2. Wired - Juniper Networks' hidden backdoors show the risk of government backdoors
  3. SecurityTracker - ID 1034489
  4. CERT - VU#640184
  5. Juniper Forums - Important Announcement about ScreenOS
  6. GitHub - juniper-cve-2015-7755
  7. Juniper Knowledge Base - JSA10713
  8. Twitter - Cryptoron Status
  9. Adam Caudill - Much Ado About Juniper
  10. Forbes - Juniper says it didn't work with government to add unauthorized code to network gear
  11. SecurityFocus - BID 79626

Early Warning

Customers using Armis Early Warning were notified about this vulnerability before it appeared in CISA's Known Exploited Vulnerabilities Catalog, enabling them to assess their exposure and act proactively. Armis offers these examples of CVEs already included in CISA KEV for potential customers. Click here to learn how to receive alerts earlier.

Armis Alert Date
Dec 19, 2015
CISA KEV Date
Oct 2, 2025
3575days early

Industry ExposureMost to least
This section illustrates the prevalence of a specific Common Vulnerabilities and Exposures (CVE) across various industries based on customer reports. The ranking displays industries from the most to least affected by this particular vulnerability, offering valuable insight into where this CVE has been most frequently observed. This information can help organizations within these sectors prioritize their security efforts, understand their relative risk exposure compared to their peers, and focus remediation strategies where they are most needed. By understanding the industry-specific impact, organizations can make more informed decisions regarding patching, resource allocation, and overall risk management related to this CVE.

  1. Manufacturing: Low
    Manufacturing
  2. Arts, Entertainment & Recreation: Low
    Arts, Entertainment & Recreation
  3. Health Care & Social Assistance: Low
    Health Care & Social Assistance
  4. Public Administration: Low
    Public Administration
  5. Educational Services: Low
    Educational Services
  6. Management of Companies & Enterprises: Low
    Management of Companies & Enterprises
  7. Professional, Scientific, & Technical Services: Low
    Professional, Scientific, & Technical Services
  8. Retail Trade: Low
    Retail Trade
  9. Transportation & Warehousing: Low
    Transportation & Warehousing
  10. Accommodation & Food Services: Low
    Accommodation & Food Services
  11. Administrative, Support, Waste Management & Remediation Services: Low
    Administrative, Support, Waste Management & Remediation Services
  12. Agriculture, Forestry Fishing & Hunting: Low
    Agriculture, Forestry Fishing & Hunting
  13. Construction: Low
    Construction
  14. Finance and Insurance: Low
    Finance and Insurance
  15. Information: Low
    Information
  16. Mining: Low
    Mining
  17. Other Services (except Public Administration): Low
    Other Services (except Public Administration)
  18. Real Estate Rental & Leasing: Low
    Real Estate Rental & Leasing
  19. Utilities: Low
    Utilities
  20. Wholesale Trade: Low
    Wholesale Trade

Focus on What Matters

  1. See Everything.
  2. Identify True Risk.
  3. Proactively Mitigate Threats.

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