CVE-2023-28964

Junos OS and Junos OS Evolved: Malformed BGP flowspec update causes RPD crash

Description

An Improper Handling of Length Parameter Inconsistency vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a network based, unauthenticated attacker to cause an RPD crash leading to a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. Upon receipt of a malformed BGP flowspec update, RPD will crash resulting in a Denial of Service. This issue affects Juniper Networks Junos OS: All versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S6; 18.3 versions prior to 18.3R3-S4; 18.4 versions prior to 18.4R3-S6; 19.1 versions prior to 19.1R3-S4; 19.2 versions prior to 19.2R3-S1; 19.3 versions prior to 19.3R3-S1; 19.4 versions prior to 19.4R3; 20.1 versions prior to 20.1R2; 20.2 versions prior to 20.2R2; 20.3 versions prior to 20.3R1-S1, 20.3R2; Juniper Networks Junos OS Evolved: All versions prior to 20.1R3-EVO; 20.2 versions prior to 20.2R2-EVO; 20.3 versions prior to 20.3R2-EVO;

Remediation

Solution:

  • The following software releases have been updated to resolve this specific issue: Junos OS: 18.1R3-S11, 18.2R3-S6, 18.3R3-S4, 18.4R3-S6, 19.1R3-S4, 19.2R3-S1, 19.3R3-S1, 19.4R3, 20.1R2, 20.2R2, 20.3R1-S1, 20.3R2, 20.4R1, and all subsequent releases. Junos OS Evolved: 20.1R3-EVO, 20.2R2-EVO, 20.3R2-EVO, 20.4R1-EVO, and all subsequent releases.

Workaround:

  • There are no known workarounds for this issue.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.24%
Vendor Advisory juniper.net
Affected: Juniper Networks Junos OS
Affected: Juniper Networks Junos OS Evolved
Published at:
Updated at:

References

Frequently Asked Questions

What is the severity of CVE-2023-28964?
CVE-2023-28964 has been scored as a high severity vulnerability.
How to fix CVE-2023-28964?
To fix CVE-2023-28964: The following software releases have been updated to resolve this specific issue: Junos OS: 18.1R3-S11, 18.2R3-S6, 18.3R3-S4, 18.4R3-S6, 19.1R3-S4, 19.2R3-S1, 19.3R3-S1, 19.4R3, 20.1R2, 20.2R2, 20.3R1-S1, 20.3R2, 20.4R1, and all subsequent releases. Junos OS Evolved: 20.1R3-EVO, 20.2R2-EVO, 20.3R2-EVO, 20.4R1-EVO, and all subsequent releases.
Is CVE-2023-28964 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-28964 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-28964?
CVE-2023-28964 affects Juniper Networks Junos OS, Juniper Networks Junos OS Evolved.
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