Improper certificate validation in Juniper Junos OS - CVE-2016-1280

Vulnerability identifier: #VU141

CSH Severity: Medium

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

CVE-ID: CVE-2016-1280

CWE-ID: CWE-295

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vendor: Juniper Networks, Inc.

Affected software:
Juniper Junos OS

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

The vulnerability exists due to CN validation error. A remote unauthenticated attacker can bypass certificate validation on the target system by supplying a specially crafted self-signed certificate with a spoofed Common Name (CN) value that matches a valid certificate authority (CA).
This issue only affects certificates used for IKE/IPsec. Other public key-based authentication is unaffected by this vulnerability.

Successful exploitation of this vulnerability may result in host/resource access.

Install update from vendor's website.

• https://supportportal.juniper.net/s/article/2016-07-Security-Bulletin-Junos-Self-signed-certificate-with-spoofed-trusted-Issuer-CN-accepted-as-valid-CVE-2016-1280?language=en_US