Zero-day Vulnerability Database

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Zero-day vulnerabilities discovered: 2

Two backdoors in Juniper ScreenOS
CVE-2015-7756

Information disclosure

The vulnerability allows a remote attacker to obtain potentially sensitive information on the target system.

The weakness exists due to usage of insecure encryption keys. A remote attacker can with ability to monitor VPN traffic can intercept and decrypt it.

Successful exploitation of the vulnerability results in information disclosure on the target system.

Note: the vulnerability was disclosed as part of two backdoors during internal source code audit.
i

Revealed during source code review by the vendor.

Software: Juniper ScreenOS

Revealed during source code review by the vendor.

Links:

https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10713&cat=SIRT_1&actp=LIST
https://blog.cryptographyengineering.com/2015/12/22/on-juniper-backdoor/
http://securityaffairs.co/wordpress/42983/hacking/juniper-backdoor-attacks-honeypot.html
https://adamcaudill.com/2015/12/17/much-ado-about-juniper/
http://www.dmnews.com/news-bytes/juniper-warns-of-two-attacks-of-unauthorised-code-on-its-routers/ar...
http://resources.infosecinstitute.com/infosec-year-end-highlights/#gref
https://www.wired.com/2015/12/researchers-solve-the-juniper-mystery-and-they-say-its-partially-the-n...
https://thehackernews2.blogspot.com/2016/12/backdoor-found-in-sonys-ip-security.html
http://blogs.splunk.com/2016/01/05/discover-and-monitor-juniper-vulnerability-cve-2015-7755-exploits...
http://www.securityweek.com/juniper-firewall-backdoor-password-found-6-hours
http://www.theregister.co.uk/2015/12/20/juniper_details_two_attacks_from_unauthorised_code/

Full report >

Two backdoors in Juniper ScreenOS
CVE-2015-7755

Authentication bypass

The vulnerability allows a remote attacker to bypass authentication on the target system.

The weakness exists due to presence of backdoor in Juniper ScreenOS code. A remote attacker can enter a password "<<< %s(un='%s') = %u" during a SSH or TELNET session and obtain administrative access to the device.

Successful exploitation of the vulnerability results in unauthorized access to the vulnerable system.

Note: the vulnerability was being actively exploited.
i

Revealed during source code review by the vendor.

Software: Juniper ScreenOS

Revealed during source code review by the vendor.

Links:

https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10713&cat=SIRT_1&actp=LIST
https://blog.cryptographyengineering.com/2015/12/22/on-juniper-backdoor/
http://securityaffairs.co/wordpress/42983/hacking/juniper-backdoor-attacks-honeypot.html
https://adamcaudill.com/2015/12/17/much-ado-about-juniper/
http://www.dmnews.com/news-bytes/juniper-warns-of-two-attacks-of-unauthorised-code-on-its-routers/ar...
http://resources.infosecinstitute.com/infosec-year-end-highlights/#gref
https://www.wired.com/2015/12/researchers-solve-the-juniper-mystery-and-they-say-its-partially-the-n...
https://thehackernews2.blogspot.com/2016/12/backdoor-found-in-sonys-ip-security.html
http://blogs.splunk.com/2016/01/05/discover-and-monitor-juniper-vulnerability-cve-2015-7755-exploits...
http://www.securityweek.com/juniper-firewall-backdoor-password-found-6-hours
http://www.theregister.co.uk/2015/12/20/juniper_details_two_attacks_from_unauthorised_code/

Full report >

About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.