Out-of-bounds write in Juniper Junos OS

1) Out-of-bounds write

EUVDB-ID: #VU85278

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-21591

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

The vulnerability exists due to >an out-of-bounds write error in J-Web. A remote non-authenticated attacker can cause a Denial of Service (DoS), or Remote Code Execution (RCE) and obtain root privileges on the device.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 20.4R1 - 22.4R2-S1

External links

http://supportportal.juniper.net/s/article/2024-01-Security-Bulletin-Junos-OS-SRX-Series-and-EX-Series-Security-Vulnerability-in-J-web-allows-a-preAuth-Remote-Code-Execution-CVE-2024-21591

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.