#VU21693 Improper Certificate Validation in Juniper Junos OS - CVE-2019-0054

Vulnerability identifier: #VU21693

Vulnerability risk: Medium

CVSSv4.0: 4.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-0054

CWE-ID: CWE-295

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Juniper Junos OS
Operating systems & Components / Operating system

Vendor: Juniper Networks, Inc.

Description

The vulnerability allows a remote attacker to perform a man-in-the-middle (MiTM) attack.

The vulnerability exists due to an improper certificate validation weakness in the SRX Series Application Identification (app-id) signature update client. A remote attacker can perform MitM attack during app-id signature updates.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 15.1X49-D10 - 15.1X49

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External links
https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10952&cat=SIRT_1&actp=LIST

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.