CVE-2024-39552

Junos OS and Junos OS Evolved: Malformed BGP UPDATE causes RPD crash

State: Published
Severity: 8.7 High
Published: Jul 11, 2024
Updated: Aug 2, 2024
Reserved: Jun 25, 2024

Description

An Improper Handling of Exceptional Conditions vulnerability in the routing protocol daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved allows a network based, unauthenticated attacker to cause the RPD process to crash leading to a Denial of Service (DoS).

When a malformed BGP UPDATE packet is received over an established BGP session, RPD crashes and restarts.

Continuous receipt of the malformed BGP UPDATE messages will create a sustained Denial of Service (DoS) condition for impacted devices.

This issue affects eBGP and iBGP, in both IPv4 and IPv6 implementations. This issue requires a remote attacker to have at least one established BGP session.

This issue affects:

Juniper Networks Junos OS: * All versions earlier than 20.4R3-S9; * 21.2 versions earlier than 21.2R3-S7; * 21.3 versions earlier than 21.3R3-S5; * 21.4 versions earlier than 21.4R3-S6; * 22.1 versions earlier than 22.1R3-S4; * 22.2 versions earlier than 22.2R3-S3; * 22.3 versions earlier than 22.3R3-S2; * 22.4 versions earlier than 22.4R3; * 23.2 versions earlier than 23.2R2.

Juniper Networks Junos OS Evolved: * All versions earlier than 21.2R3-S7; * 21.3-EVO versions earlier than 21.3R3-S5; * 21.4-EVO versions earlier than 21.4R3-S8; * 22.1-EVO versions earlier than 22.1R3-S4; * 22.2-EVO versions earlier than 22.2R3-S3; * 22.3-EVO versions earlier than 22.3R3-S2; * 22.4-EVO versions earlier than 22.4R3; * 23.2-EVO versions earlier than 23.2R2.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/R:A	juniper
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	juniper

Weaknesses

CWE-755 Improper Handling of Exceptional Conditions

Affected Products

Product	Versions
Junos OSJuniper Networks	before 20.4R3-S9Affected 21.2 to before 21.2R3-S7Affected 21.3 to before 21.3R3-S6Affected 21.4 to before 21.4R3-S6Affected 22.1 to before 22.1R3-S4Affected 22.2 to before 22.2R3-S3Affected 22.3 to before 22.3R3-S2Affected 22.4 to before 22.4R3Affected 23.2 to before 23.2R2Affected
Junos OS EvolvedJuniper Networks	before 21.2R3-S7-EVOAffected 21.3-EVO to before 21.3R3-S5-EVOAffected 21.4-EVO to before 21.4R3-S8-EVOAffected 22.1-EVO to before 22.1R3-S4-EVOAffected 22.2-EVO to before 22.2R3-S3-EVOAffected 22.3-EVO to before 22.3R3-S2-EVOAffected 22.4-EVO to before 22.4R3-EVOAffected 23.2-EVO to before 23.2R2-EVOAffected 23.4-EVO to before 23.4R1-EVOAffected

References

https://supportportal.juniper.net/JSA75726vendor-advisory

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.