Vulnerability identifier: #VU88976

Vulnerability risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-1628

CWE-ID: CWE-200

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 gain access to potentially sensitive information.

The vulnerability exists due to excessive data output. A remote attacker can access heartbeats, kernel versions, etc. out to the Internet if the 128.0.0.0/2 subnet is sued for internal communications between the RE and PFEs.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 20.4R1 - 20.4R3-S3, 21.4R1 - 21.4R2-S2, 22.1R1-S1 - 22.1R1-S2, 14.1R1 - 14.1x51, 14.1X53-D12 - 14.1X53-D51, 15.1F - 15.1F7-S2, 15.1R - 15.1R7-S5, 19.2R1 - 19.2R1-S3, 17.1R1 - 17.1R2-S10, 16.1R - 16.1R7-S6, 18.3R1 - 18.3R2-S2, 19.1R - 19.1R1-S3, 17.4R1 - 17.4R2-S8, 17.3R1 - 17.3R2-S4, 19.4R1-S1 - 19.4R1-S4, 18.4R1 - 18.4R1-S4, 18.2R1 - 18.2R3-S1, 19.3R1, 19.3R2-S1 - 19.3R2-S7, 18.1R1 - 18.1R3-S7, 17.2R1 - 17.2R3-S2

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External links
http://supportportal.juniper.net/s/article/2020-04-Security-Bulletin-Junos-OS-EX4300-and-MX204-Traffic-from-the-network-internal-to-the-device-128-0-0-0-may-be-forwarded-to-egress-interfaces-CVE-2020-1628

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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.