CVE-2023-28981: Junos OS and Junos OS Evolved: If malformed IPv6 router advertisements are received, memory corruption will occur which causes an rpd crash

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-04-17 · updated 2026-06-17
Weakness: CWE-20

Description

An Improper Input Validation vulnerability in the kernel of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS). If the receipt of router advertisements is enabled on an interface and a specifically malformed RA packet is received, memory corruption will happen which leads to an rpd crash. This issue affects: Juniper Networks Junos OS 20.3 versions prior to 20.3R3-S5; 20.4 versions prior to 20.4R3-S3; 21.1 versions prior to 21.1R3-S4; 21.2 versions prior to 21.2R3; 21.3 versions prior to 21.3R3; 21.4 versions prior to 21.4R2; 22.1 versions prior to 22.1R2. Juniper Networks Junos OS Evolved 20.3-EVO version 20.3R1-EVO and later versions; 20.4-EVO versions prior to 20.4R3-S6-EVO; 21.3-EVO versions prior to 21.3R3-EVO; 21.4-EVO versions prior to 21.4R2-EVO; 22.1-EVO versions prior to 22.1R2-EVO.

Affected products

Juniper Junos OS: 20.3, 20.3-r1, 20.3-r1-s1, 20.3-r1-s2, 20.3-r2, 20.3-r2-s1 (+45)
Juniper Networks Junos OS Evolved: 20.3-r1, 20.3-r1-s1, 20.3-r1-s2, 20.3-r1-s3, 20.3-r2, 20.4 (+26)

References

Get alerted when CVE-2023-28981 or the next vulnerability affects your stack