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CVE-2015-7756

Published Dec 19, 2015 juniper CWE-310

Overview

CVE-2015-7756 is a known-severity vulnerability affecting juniper screenos. It was published on December 19, 2015.

Technical Description

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.

Remediation

Check the references section for vendor advisories and patches from juniper. Update screenos to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected Products

Vendor Product Versions Status

References

Ref arstechnica.com/security/2015/12/unauthorized-code-in-juniper-firewalls-decrypts-encrypted-vpn-traffic/ Ref kb.juniper.net/InfoCenter/index?page=content&id=JSA10713 Ref www.forbes.com/sites/thomasbrewster/2015/12/18/juniper-says-it-didnt-work-with-government-to-add-unauthorized-code-to-network-gear/ Ref www.kb.cert.org/vuls/id/640184 Ref www.securitytracker.com/id/1034489 Ref www.wired.com/2015/12/juniper-networks-hidden-backdoors-show-the-risk-of-government-backdoors/ Ref adamcaudill.com/2015/12/17/much-ado-about-juniper/ Ref forums.juniper.net/t5/Security-Incident-Response/Important-Announcement-about-ScreenOS/ba-p/285554 GitHub github.com/hdm/juniper-cve-2015-7755 Ref arstechnica.com/security/2015/12/unauthorized-code-in-juniper-firewalls-decrypts-encrypted-vpn-traffic/

Frequently Asked Questions

What is CVE-2015-7756?

CVE-2015-7756 is a known-severity vulnerability affecting juniper screenos. It was published on December 19, 2015.

How severe is CVE-2015-7756?

CVSS score information is not yet available for this vulnerability. Check back as the CVE record is updated by NVD analysts.

How do I fix or remediate CVE-2015-7756?

Check the references section for vendor advisories and patches from juniper. Update screenos to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2015-7756?

CyberStrike's AI-powered security agents can automatically detect CVE-2015-7756 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.

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