#VU88443 Improper check for unusual or exceptional conditions in Juniper Junos OS - CVE-2024-30397

Vulnerability identifier: #VU88443

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-30397

CWE-ID: CWE-754

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 non-authenticated attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper check for unusual or exceptional conditions error in the Public Key Infrastructure daemon (pkid). A remote non-authenticated attacker can cause Denial of Service (DoS).

The pkid is responsible for the certificate verification.

Upon a failed verification, the pkid uses all CPU resources and becomes unresponsive to future verification attempts.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 20.4R1-S1 - 20.4R3-S9, 21.2R1-S1 - 21.2R3-S6, 21.4R1-S1 - 21.4R3-S4, 22.1R1-S1 - 22.1R3-S3, 22.2R1-S1 - 22.2R3-S2, 22.3R1-S1 - 22.3R2, 22.4R1-S1 - 22.4R3-S1, 23.2R1-S1, 23.4R1-S1

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External links
https://supportportal.juniper.net/s/article/2024-04-Security-Bulletin-Junos-OS-An-invalid-certificate-causes-a-Denial-of-Service-in-the-Internet-Key-Exchange-IKE-process-CVE-2024-30397

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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.