#VU21698 Input validation error in Juniper Junos OS - CVE-2019-0060

Vulnerability identifier: #VU21698

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-0060

CWE-ID: CWE-20

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 denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in the flowd process when processing specific transit IP packets through an IPSec tunnel. A remote attacker can cause an extended Denial of Service (DoS) condition.

Note: This issue only occurs when IPSec tunnels are configured. Systems without IPSec tunnel configurations are not vulnerable to this issue.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 15.1X49-D10 - 15.1X49, 18.2R2-S1 - 18.2R2-S5, 18.4R1-S1 - 18.4R1

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External links
https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10959&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.