CVE-2024-39526

Oct. 15, 2024, 12:58 p.m.

CVSS Score

6.5 / 10

Product(s) Impacted

Junos OS

  • All versions before 21.2R3-S7
  • from 21.4 before 21.4R3-S6
  • from 22.2 before 22.2R3-S3
  • all versions of 22.3
  • from 22.4 before 22.4R3
  • from 23.2 before 23.2R2

Junos OS Evolved

  • from 19.3R1-EVO before 21.2R3-S8-EVO
  • from 21.4-EVO before 21.4R3-S7-EVO
  • from 22.1-EVO before 22.1R3-S6-EVO
  • from 22.2-EVO before 22.2R3-S5-EVO
  • from 22.3-EVO before 22.3R3-S3-EVO
  • from 22.4-EVO before 22.4R3-S1-EVO
  • from 23.2-EVO before 23.2R2-S2-EVO
  • from 23.4-EVO before 23.4R2-EVO

Description

An Improper Handling of Exceptional Conditions vulnerability in packet processing of Juniper Networks Junos OS on MX Series with MPC10/MPC11/LC9600 line cards, EX9200 with EX9200-15C lines cards, MX304 devices, and Juniper Networks Junos OS Evolved on PTX Series, allows an attacker sending malformed DHCP packets to cause ingress packet processing to stop, leading to a Denial of Service (DoS).  Continued receipt and processing of these packets will create a sustained Denial of Service (DoS) condition. This issue only occurs if DHCP snooping is enabled. See configuration below. This issue can be detected using following commands. Their output will display the interface status going down: user@device>show interfaces <if--x/x/x> user@device>show log messages | match <if--x/x/x> user@device>show log messages ==> will display the "[Error] Wedge-Detect : Host Loopback Wedge Detected: PFE: no," logs. This issue affects: Junos OS on MX Series with MPC10/MPC11/LC9600 line cards, EX9200 with EX9200-15C line cards, and MX304: * All versions before 21.2R3-S7, * from 21.4 before 21.4R3-S6, * from 22.2 before 22.2R3-S3, * all versions of 22.3, * from 22.4 before 22.4R3, * from 23.2 before 23.2R2; Junos OS Evolved on PTX Series: * from 19.3R1-EVO before 21.2R3-S8-EVO, * from 21.4-EVO before 21.4R3-S7-EVO, * from 22.1-EVO before 22.1R3-S6-EVO, * from 22.2-EVO before 22.2R3-S5-EVO, * from 22.3-EVO before 22.3R3-S3-EVO, * from 22.4-EVO before 22.4R3-S1-EVO, * from 23.2-EVO before 23.2R2-S2-EVO, * from 23.4-EVO before 23.4R2-EVO. Junos OS Evolved releases prior to 19.3R1-EVO are unaffected by this vulnerability

Weaknesses

CWE-755
Improper Handling of Exceptional Conditions

The product does not handle or incorrectly handles an exceptional condition.

CWE ID: 755

Date

Published: Oct. 11, 2024, 4:15 p.m.

Last Modified: Oct. 15, 2024, 12:58 p.m.

Status : Awaiting Analysis

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

sirt@juniper.net

CVSS Data

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Privileges Required

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

Base Score
6.5
Exploitability Score
2.8
Impact Score
3.6
Base Severity
MEDIUM
CVSS Vector String

The CVSS vector string provides an in-depth view of the vulnerability metrics.

View Vector String

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References