Vulnerability identifier: #VU49554

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-0210

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 in J-Web. A remote non-authenticated attacker can elevate privileges over the target system through opportunistic use of an authenticated users session.

Mitigation

Install updates from vendor's website.

This issue affects:

Juniper Networks Junos OS

• 12.3 versions prior to 12.3R12-S17;
• 17.3 versions prior to 17.3R3-S10;
• 17.4 versions prior to 17.4R2-S12, 17.4R3-S3;
• 18.1 versions prior to 18.1R3-S11;
• 18.2 versions prior to 18.2R3-S6;
• 18.3 versions prior to 18.3R2-S4, 18.3R3-S4;
• 18.4 versions prior to 18.4R2-S5, 18.4R3-S5;
• 19.1 versions prior to 19.1R1-S6, 19.1R2-S2, 19.1R3-S3;
• 19.2 versions prior to 19.2R1-S5, 19.2R3, 19.2R3-S1;
• 19.3 versions prior to 19.3R2-S4, 19.3R3;
• 19.4 versions prior to 19.4R1-S3, 19.4R2-S2, 19.4R3;
• 20.1 versions prior to 20.1R1-S4, 20.1R2;
• 20.2 versions prior to 20.2R1-S1, 20.2R2.

Vulnerable software versions

Juniper Junos OS: 18.3 - 18.3R3-S3, 18.3R2-S3, 18.3R3-S1, 20.3, 20.2 - 20.2R1-S3, 19.4 - 19.4R2-S8, 19.4R1 - 19.4R1-S4, 19.2 - 19.2R2-S1, 19.2R1-S4, 19.1 - 19.1R3-S2, 19.1R1-S4, 17.4 - 17.4R3-S2, 17.4R2-S9, 17.3 - 17.3R3-S9, 15.1 - 15.1R7-S7, 15.1F - 15.1F7-S2, 20.1 - 20.1R1-S3, 18.2 - 18.2R3-S5, 12.3 - 12.3R12-S16, 18.1 - 18.1R3-S10, 18.4 - 18.4R3-S4, 18.4R1-S5, 18.4R2-S3, 19.3 - 19.3R1, 19.3R1-S1, 19.3R2 - 19.3R2-S7

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External links
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA11100&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.