Riskcovery

CVE-2023-36841

Junos OS: MX Series: Receipt of malformed TCP traffic will cause a Denial of Service

State
Published
Severity
7.5 High
Published
Oct 12, 2023
Updated
Sep 18, 2024
Reserved
Jun 27, 2023

Read the record on cve.org

Description

An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS on MX Series allows a unauthenticated network-based attacker to cause an infinite loop, resulting in a Denial of Service (DoS).

An attacker who sends malformed TCP traffic via an interface configured with PPPoE, causes an infinite loop on the respective PFE. This results in consuming all resources and a manual restart is needed to recover.

This issue affects interfaces with PPPoE configured and tcp-mss enabled.

This issue affects Juniper Networks Junos OS

* All versions prior to 20.4R3-S7; * 21.1 version 21.1R1 and later versions; * 21.2 versions prior to 21.2R3-S6; * 21.3 versions prior to 21.3R3-S5; * 21.4 versions prior to 21.4R3-S3; * 22.1 versions prior to 22.1R3-S4; * 22.2 versions prior to 22.2R3; * 22.3 versions prior to 22.3R2-S2; * 22.4 versions prior to 22.4R2;

Scores

CVSSScoreVectorSource
3.17.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hjuniper

Weaknesses

  • CWE-400 Uncontrolled Resource Consumption

Affected Products

ProductVersions
Junos OSJuniper Networks
  • before 20.4R3-S7Affected
  • 21.1R1 to before 21.1*Affected
  • 21.2 to before 21.2R3-S6Affected
  • 21.3 to before 21.3R3-S5Affected
  • 21.4 to before 21.4R3-S3Affected
  • 22.1 to before 22.1R3-S4Affected
  • 22.2 to before 22.2R3Affected
  • 22.3 to before 22.3R2-S2, 22.3R3Affected
  • 22.4 to before 22.4R2Affected

References

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