PT-2023-3196 · Juniper Networks · Junos+1

Published 2023-06-21 · Updated 2023-07-17 · CVE-2023-0026

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Juniper Networks Junos OS versions 15.1R1 through 20.4R3-S8 Juniper Networks Junos OS versions 21.1R1 through 21.2R3-S6 Juniper Networks Junos OS versions prior to 21.3R3-S5 Juniper Networks Junos OS versions prior to 21.4R3-S4 Juniper Networks Junos OS versions prior to 22.1R3-S4 Juniper Networks Junos OS versions prior to 22.2R3-S2 Juniper Networks Junos OS versions prior to 22.3R2-S2, 22.3R3-S1 Juniper Networks Junos OS versions prior to 22.4R2-S1, 22.4R3 Juniper Networks Junos OS versions prior to 23.1R1-S1, 23.1R2 Juniper Networks Junos OS Evolved versions prior to 20.4R3-S8-EVO Juniper Networks Junos OS Evolved versions 21.1R1-EVO through 21.2R3-S6-EVO Juniper Networks Junos OS Evolved versions prior to 21.3R3-S5-EVO Juniper Networks Junos OS Evolved versions prior to 21.4R3-S4-EVO Juniper Networks Junos OS Evolved versions prior to 22.1R3-S4-EVO Juniper Networks Junos OS Evolved versions prior to 22.2R3-S2-EVO Juniper Networks Junos OS Evolved versions prior to 22.3R2-S2-EVO, 22.3R3-S1-EVO Juniper Networks Junos OS Evolved versions prior to 22.4R2-S1-EVO, 22.4R3-EVO Juniper Networks Junos OS Evolved versions prior to 23.1R1-S1-EVO, 23.1R2-EVO

Description The issue is related to an Improper Input Validation vulnerability in the Routing Protocol Daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved. This vulnerability allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS) by sending a BGP update message with a specific, optional transitive attribute over an established BGP session. The session will be torn down with an update message error, and continuous receipt of such a message can create a sustained Denial of Service (DoS) condition. Some customers have experienced BGP session flaps due to this issue, prompting Juniper SIRT to release an advisory with an effective workaround.

Recommendations For Juniper Networks Junos OS versions 15.1R1 through 20.4R3-S8, update to version 20.4R3-S8 or later. For Juniper Networks Junos OS versions 21.1R1 through 21.2R3-S6, update to version 21.2R3-S6 or later. For Juniper Networks Junos OS versions prior to 21.3R3-S5, update to version 21.3R3-S5 or later. For Juniper Networks Junos OS versions prior to 21.4R3-S4, update to version 21.4R3-S4 or later. For Juniper Networks Junos OS versions prior to 22.1R3-S4, update to version 22.1R3-S4 or later. For Juniper Networks Junos OS versions prior to 22.2R3-S2, update to version 22.2R3-S2 or later. For Juniper Networks Junos OS versions prior to 22.3R2-S2, 22.3R3-S1, update to version 22.3R2-S2, 22.3R3-S1 or later. For Juniper Networks Junos OS versions prior to 22.4R2-S1, 22.4R3, update to version 22.4R2-S1, 22.4R3 or later. For Juniper Networks Junos OS versions prior to 23.1R1-S1, 23.1R2, update to version 23.1R1-S1, 23.1R2 or later. For Juniper Networks Junos OS Evolved versions prior to 20.4R3-S8-EVO, update to version 20.4R3-S8-EVO or later. For Juniper Networks Junos OS Evolved versions 21.1R1-EVO through 21.2R3-S6-EVO, update to version 21.2R3-S6-EVO or later. For Juniper Networks Junos OS Evolved versions prior to 21.3R3-S5-EVO, update to version 21.3R3-S5-EVO or later. For Juniper Networks Junos OS Evolved versions prior to 21.4R3-S4-EVO, update to version 21.4R3-S4-EVO or later. For Juniper Networks Junos OS Evolved versions prior to 22.1R3-S4-EVO, update to version 22.1R3-S4-EVO or later. For Juniper Networks Junos OS Evolved versions prior to 22.2R3-S2-EVO, update to version 22.2R3-S2-EVO or later. For Juniper Networks Junos OS Evolved versions prior to 22.3R2-S2-EVO, 22.3R3-S1-EVO, update to version 22.3R2-S2-EVO, 22.3R3-S1-EVO or later. For Juniper Networks Junos OS Evolved versions prior to 22.4R2-S1-EVO, 22.4R3-EVO, update to version 22.4R2-S1-EVO, 22.4R3-EVO or later. For Juniper Networks Junos OS Evolved versions prior to 23.1R1-S1-EVO, 23.1R2-EVO, update to version 23.1R1-S1-EVO, 23.1R2-EVO or later. As a temporary workaround, consider disabling the BGP update message processing for the specific, optional transitive attribute until a patch is available.

Fix

DoS

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BDU:2023-03306

CVE-2023-0026

Affected Products

Junos

Junos Evolved

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2023-0026 · Security Note
• https://supportportal.juniper.net/JSA71542 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-0026 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-03306 · Security Note
• https://t.me/cvenotify/52823 · Telegram Post
• https://t.me/cibsecurity/65389 · Telegram Post
• https://juniper.net/documentation/us/en/software/junos/bgp/topics/topic-map/bgp-error-messages.html · Note
• https://kb.juniper.net/JSA71542 · Note
• https://t.me/cvenotify/52803 · Telegram Post