Vulnerability identifier: #VU47666

Vulnerability risk: High

CVSSv3.1: 7.2 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-1667

CWE-ID: CWE-362

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 escalate privileges on the system.

The vulnerability exists due to a race condition when DNS filtering is enabled with one of the following cards MS-PIC, MS-MIC or MS-MPC. A remote attacker can exploit the race, cause a deial of service (DoS) condition and escalate privileges on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 17.3R1 - 17.3R3-S7, 18.3R1 - 18.3R3, 18.4R1 - 18.4R2-S5, 19.1R - 19.1R2-S2, 19.2R1 - 19.2R1-S5, 19.3R1 - 19.3R2-S4

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External links
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA11064&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.