CVE-2023-0026

An Improper Input Validation vulnerability in the Routing Protocol Daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS). When a BGP update message is received over an established BGP session, and that message contains a specific, optional transitive attribute, this session will be torn down with an update message error. This issue cannot propagate beyond an affected system as the processing error occurs as soon as the update is received. This issue is exploitable remotely as the respective attribute can propagate through unaffected systems and intermediate AS (if any). Continuous receipt of a BGP update containing this attribute will create a sustained Denial of Service (DoS) condition. Some customers have experienced these BGP session flaps which prompted Juniper SIRT to release this advisory out of cycle before fixed releases are widely available as there is an effective workaround. This issue affects: Juniper Networks Junos OS 15.1R1 and later versions prior to 20.4R3-S8; 21.1 version 21.1R1 and later versions prior to 21.2R3-S6; 21.3 versions prior to 21.3R3-S5; 21.4 versions prior to 21.4R3-S4; 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; 23.1 versions prior to 23.1R1-S1, 23.1R2. Juniper Networks Junos OS Evolved All versions prior to 20.4R3-S8-EVO; 21.1 version 21.1R1-EVO and later versions prior to 21.2R3-S6-EVO; 21.3 versions prior to 21.3R3-S5-EVO; 21.4 versions prior to 21.4R3-S4-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; 23.1 versions prior to 23.1R1-S1-EVO, 23.1R2-EVO.

• CWE-20

• https://supportportal.juniper.net/JSA71542
• https://www.juniper.net/documentation/us/en/software/junos/bgp/topics/topic-map/bgp-error-messages.htmlProduct
• https://supportportal.juniper.net/JSA71542
• https://www.juniper.net/documentation/us/en/software/junos/bgp/topics/topic-map/bgp-error-messages.htmlProduct

Published

Jun 21, 2023

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2023-0020SAP BusinessObjects Business Intelligence platform - version…7.1
• CVE-2023-0021Due to insufficient encoding of user input, SAP NetWeaver - …6.1
• CVE-2023-0022SAP BusinessObjects Business Intelligence Analysis edition f…8.8
• CVE-2023-0023In SAP Bank Account Management (Manage Banks) application, w…5.7
• CVE-2023-0024SAP Solution Manager (BSP Application) - version 720, allows…5.4
• CVE-2023-0025SAP Solution Manager (BSP Application) - version 720, allows…5.4
• CVE-2023-0027Rockwell Automation Modbus TCP Server AOI prior to 2.04.00 i…4.3
• CVE-2023-0028Cross-site Scripting (XSS) - Stored in GitHub repository lin…5.4
• CVE-2023-0029A vulnerability was found in Multilaser RE708 RE1200R4GC-2T2…7.5
• CVE-2023-0030A use-after-free flaw was found in the Linux kernel’s nouvea…7.8
• CVE-2023-0033The PDF Viewer WordPress plugin before 1.0.0 does not valida…5.4
• CVE-2023-0034The JetWidgets For Elementor WordPress plugin before 1.0.14 …5.4