#VU68368 Incorrect default permissions in Juniper Junos OS - CVE-2022-22251

Vulnerability identifier: #VU68368

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-22251

CWE-ID: CWE-276

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Juniper Junos OS
Operating systems & Components / Operating system

Vendor: Juniper Networks, Inc.

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to incorrect default permissions in the container filesystem combined with storing passwords in a recoverable format on cSRX Series devices. A local user with access to the system can retrieve credentials and compromise the affected device.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 20.2R1-S1, 20.2R1-S2, 20.2R1-S3, 20.2R2-S1, 20.2R2-S2, 20.2R2-S3, 20.2R3-S1, 20.2R3-S2, 20.2R3-S3, 20.2R3-S4, 20.2R3-S5, 20.2R3-S6, 20.2R3-S7, 20.2R3-S8, 20.2R1, 20.2R2, 20.2R3, 20.3R1-S1, 20.3R1-S2, 20.3R2-S1, 20.3R3-S1, 20.3R3-S2, 20.3R3-S3, 20.3R3-S4, 20.3R3-S5, 20.3R3-S6, 20.3R1, 20.3R2, 20.3R3, 20.4R1-S1, 20.4R2-S1, 20.4R2-S2, 20.4R3-S1, 20.4R3-S2, 20.4R3-S3, 20.4R3-S4, 20.4R3-S5, 20.4R3-S6, 20.4R3-S7, 20.4R3-S8, 20.4R1, 20.4R2, 20.4R3, 21.1R1-S1, 21.1R2-S1, 21.1R2-S2, 21.1R3-S1, 21.1R3-S2, 21.1R3-S3, 21.1R3-S4, 21.1R3-S5, 21.1, 21.1R1, 21.1R2, 21.1R3

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External links
https://supportportal.juniper.net/s/article/2022-10-Security-Bulletin-cSRX-Series-Storing-Passwords-in-a-Recoverable-Format-and-software-permissions-issues-allows-a-local-attacker-to-elevate-privileges-CVE-2022-22251

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.