CVE-2023-44186

CVE.org · Published

Record status: Published
Identifier year (not publication year): 2023
Source publication: Oct 11, 2023
Source updated: Dec 3, 2024
Imported by cveboard: Oct 24, 2026
Source snapshot: cve_2026-10-24_midnight_baseline · Oct 24, 2026

CNA source text (English)

Junos OS and Junos OS Evolved: RPD crash when attempting to send a very long AS PATH to a non-4-byte-AS capable BGP neighbor

An Improper Handling of Exceptional Conditions vulnerability in AS PATH processing of Juniper Networks Junos OS and Junos OS Evolved allows an attacker to send a BGP update message with an AS PATH containing a large number of 4-byte ASes, leading to a Denial of Service (DoS). Continued receipt and processing of these BGP updates will create a sustained Denial of Service (DoS) condition. This issue is hit when the router has Non-Stop Routing (NSR) enabled, has a non-4-byte-AS capable BGP neighbor, receives a BGP update message with a prefix that includes a long AS PATH containing large number of 4-byte ASes, and has to advertise the prefix towards the non-4-byte-AS capable BGP neighbor. Note: NSR is not supported on the SRX Series and is therefore not affected by this vulnerability. This issue affects: Juniper Networks Junos OS: * All versions prior to 20.4R3-S8; * 21.1 versions 21.1R1 and later; * 21.2 versions prior to 21.2R3-S6; * 21.3 versions prior to 21.3R3-S5; * 21.4 versions prior to 21.4R3-S5; * 22.1 versions prior to 22.1R3-S4; * 22.2 versions prior to 22.2R3-S2; * 22.3 versions prior to 22.3R2-S2, 22.3R3-S1; * 22.4 versions prior to 22.4R2-S1, 22.4R3. Juniper Networks Junos OS Evolved * All versions prior to 20.4R3-S8-EVO; * 21.1 versions 21.1R1-EVO and later; * 21.2 versions prior to 21.2R3-S6-EVO; * 21.3 versions prior to 21.3R3-S5-EVO; * 21.4 versions prior to 21.4R3-S5-EVO; * 22.1 versions prior to 22.1R3-S4-EVO; * 22.2 versions prior to 22.2R3-S2-EVO; * 22.3 versions prior to 22.3R2-S2-EVO, 22.3R3-S1-EVO; * 22.4 versions prior to 22.4R2-S1-EVO, 22.4R3-EVO.

Scoped product and version facts

Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.

Exploitation unknown; this catalogue does not assess exploitation.

Junos OS

Vendor: Juniper Networks
Product: Junos OS
Platforms: MX Series
PTX Series
ACX Series
EX Series
QFX Series
Default status: unaffected

Junos OS · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
0	`affected`	semver	20.4R3-S8	Unavailable	None listed
21.1R1	`affected`	semver	21.1*	Unavailable	None listed
21.2	`affected`	semver	21.2R3-S6	Unavailable	None listed
21.3	`affected`	semver	21.3R3-S5	Unavailable	None listed
21.4	`affected`	semver	21.4R3-S5	Unavailable	None listed
22.1	`affected`	semver	22.1R3-S4	Unavailable	None listed
22.2	`affected`	semver	22.2R3-S2	Unavailable	None listed
22.3	`affected`	semver	22.3R2-S2, 22.3R3-S1	Unavailable	None listed
22.4	`affected`	semver	22.4R2-S1, 22.4R3	Unavailable	None listed

Junos OS Evolved

Vendor: Juniper Networks
Product: Junos OS Evolved
Platforms: PTX Series
ACX Series
QFX Series
Default status: unaffected

Junos OS Evolved · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
0	`affected`	semver	20.4R3-S8-EVO	Unavailable	None listed
21.1	`affected`	semver	21.1*-EVO	Unavailable	None listed
21.2	`affected`	semver	21.2R3-S6-EVO	Unavailable	None listed
21.3	`affected`	semver	21.3R3-S5-EVO	Unavailable	None listed
21.4	`affected`	semver	21.4R3-S5-EVO	Unavailable	None listed
22.1	`affected`	semver	22.1R3-S4-EVO	Unavailable	None listed
22.2	`affected`	semver	22.2R3-S2-EVO	Unavailable	None listed
22.3	`affected`	semver	22.3R2-S2-EVO, 22.3R3-S1-EVO	Unavailable	None listed
22.4	`affected`	semver	22.4R2-S1-EVO, 22.4R3-EVO	Unavailable	None listed