Vulnerability identifier: #VU75121

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-28964

CWE-ID: CWE-130

Exploitation vector: Network

Exploit availability: No

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

Vendor: Juniper Networks, Inc.

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper handling of length parameter inconsistency in the routing protocol daemon (rpd). A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Junos OS Evolved: 20.2 - 20.2R1-EVO, 20.1 - 20.1R2-S4-EVO, 20.4, 20.3 - 20.3R1-S2-EVO

Juniper Junos OS: 19.1 - 19.1R3-S3, 19.1R1-S4, 20.4, 20.3 - 20.3R1, 18.3 - 18.3R3-S3, 18.3R2-S3, 18.3R3-S1, 19.3 - 19.3R3, 19.3R1-S1, 19.3R2 - 19.3R2-S7, 20.2 - 20.2R1-S3, 19.2 - 19.2R3, 19.2R1-S4, 18.4 - 18.4R3-S5, 18.4R1-S5, 18.4R2-S3, 18.2 - 18.2R3-S5, 18.1 - 18.1R3-S10, 19.4 - 19.4R2-S8, 19.4R1 - 19.4R1-S4, 20.1 - 20.1R1-S4

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External links
http://supportportal.juniper.net/s/article/2023-04-Security-Bulletin-Junos-OS-and-Junos-OS-Evolved-Malformed-BGP-flowspec-update-causes-RPD-crash-CVE-2023-28964

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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.