PT-2024-5540 · Juniper Networks · Junos+1

Published 2024-07-10 · Updated 2024-07-11 · CVE-2024-39517

Positive Technologies (AI Summary)

CVSS v4.0

7.1

High

Base vector

AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions Junos OS versions prior to 21.4R3-S7 Junos OS versions 22.1 prior to 22.1R3-S5 Junos OS versions 22.2 prior to 22.2R3-S3 Junos OS versions 22.3 prior to 22.3R3-S3 Junos OS versions 22.4 prior to 22.4R3-S2 Junos OS versions 23.2 prior to 23.2R2 Junos OS versions 23.4 prior to 23.4R1-S1 Junos OS Evolved versions prior to 21.4R3-S7-EVO Junos OS Evolved versions 22.1 prior to 22.1R3-S5-EVO Junos OS Evolved versions 22.2 prior to 22.2R3-S3-EVO Junos OS Evolved versions 22.3 prior to 22.3R3-S3-EVO Junos OS Evolved versions 22.4 prior to 22.4R3-S2-EVO Junos OS Evolved versions 23.2 prior to 23.2R2-EVO Junos OS Evolved versions 23.4 prior to 23.4R1-S1-EVO, 23.4R2-EVO

Description An Improper Check for Unusual or Exceptional Conditions vulnerability in the Layer 2 Address Learning Daemon (l2ald) on Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to cause Denial of Service (DoS). In an EVPN/VXLAN scenario, when a high amount of specific Layer 2 packets are processed by the device, it can cause the Routing Protocol Daemon (rpd) to utilize all CPU resources, which causes the device to hang. A manual restart of the rpd is required to restore services. This issue affects both IPv4 and IPv6 implementations.

Recommendations For Junos OS versions prior to 21.4R3-S7, update to version 21.4R3-S7 or later. For Junos OS versions 22.1 prior to 22.1R3-S5, update to version 22.1R3-S5 or later. For Junos OS versions 22.2 prior to 22.2R3-S3, update to version 22.2R3-S3 or later. For Junos OS versions 22.3 prior to 22.3R3-S3, update to version 22.3R3-S3 or later. For Junos OS versions 22.4 prior to 22.4R3-S2, update to version 22.4R3-S2 or later. For Junos OS versions 23.2 prior to 23.2R2, update to version 23.2R2 or later. For Junos OS versions 23.4 prior to 23.4R1-S1, update to version 23.4R1-S1 or later. For Junos OS Evolved versions prior to 21.4R3-S7-EVO, update to version 21.4R3-S7-EVO or later. For Junos OS Evolved versions 22.1 prior to 22.1R3-S5-EVO, update to version 22.1R3-S5-EVO or later. For Junos OS Evolved versions 22.2 prior to 22.2R3-S3-EVO, update to version 22.2R3-S3-EVO or later. For Junos OS Evolved versions 22.3 prior to 22.3R3-S3-EVO, update to version 22.3R3-S3-EVO or later. For Junos OS Evolved versions 22.4 prior to 22.4R3-S2-EVO, update to version 22.4R3-S2-EVO or later. For Junos OS Evolved versions 23.2 prior to 23.2R2-EVO, update to version 23.2R2-EVO or later. For Junos OS Evolved versions 23.4 prior to 23.4R1-S1-EVO, 23.4R2-EVO, update to version 23.4R1-S1-EVO or later.

Fix

DoS

Improper Check for Exceptional Conditions

Weakness Enumeration

CWE-754

Related Identifiers

BDU:2024-06206

CVE-2024-39517

Affected Products

Junos

Junos Evolved

References · 8

• https://supportportal.juniper.net/JSA79175 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2024-39517 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-39517 · Security Note
• https://bdu.fstec.ru/vul/2024-06206 · Security Note
• https://twitter.com/VulmonFeeds/status/1811199930729427180 · Twitter Post
• https://t.me/cvedetector/611 · Telegram Post
• https://twitter.com/CVEnew/status/1811322672841998387 · Twitter Post
• https://cybersecurity-help.cz/vdb/SB2024072227 · Note