Junos OS vulnerability

What happened

An Improper Isolation or Compartmentalization vulnerability in the kernel of Juniper Networks Junos OS allows a local attacker with high privileges to compromise the integrity of the device. A local attacker with access to the shell is able to inject arbitrary code which can compromise an affected device. This issue is not exploitable from the Junos CLI. This issue affects Junos OS:  * All versions before 21.2R3-S9, * 21.4 versions before 21.4R3-S10,  * 22.2 versions before 22.2R3-S6,  * 22.4 versions before 22.4R3-S6,  * 23.2 versions before 23.2R2-S3,  * 23.4 versions before 23.4R2-S4, * 24.2 versions before 24.2R1-S2, 24.2R2.

Affected versions

Junos OS: before 21.2R3-S9 (semver); 21.4 through before 21.4R3-S10 (semver); 22.2 through before 22.2R3-S6 (semver); 22.4 through before 22.4R3-S6 (semver); 23.2 through before 23.2R2-S3 (semver); 23.4 through before 23.4R2-S4 (semver); 24.2 through before 24.2R1-S2, 24.2R2 (semver) Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

• Apply vendor-provided updates or mitigations.
• Review affected product exposure and access logs.