CVE-2021-0210 Information disclosure in Junos OS

Medium 6.8 Published 15 Jan 2021 Updated 16 Sep 2024

An unauthenticated attacker can exploit information disclosure in J-Web to hijack active sessions and achieve arbitrary code execution with elevated privileges.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2021-0210?

CVE-2021-0210 is a medium-severity vulnerability in Juniper Junos, published on 15 Jan 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

An Information Exposure vulnerability in J-Web of Juniper Networks Junos OS allows an unauthenticated attacker to elevate their privileges over the target system through opportunistic use of an authenticated users session. 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.

Weakness: CWE-200

Which versions are affected by CVE-2021-0210?

It affects 1 product.

Products include Juniper Junos.

How do I fix CVE-2021-0210?

No fix has been published for CVE-2021-0210 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-0210 being exploited?

There is no known exploitation of CVE-2021-0210 in the wild and no public exploit code.

All Juniper Junos vulnerabilities

Sources

Also known as GHSA-4gh5-fw3f-vm8m.