CVE-2023-36842
Assigner: juniper
Published: 2024-01-12T00:48:25.108Z
State: PUBLISHED
affected: defaultStatus: unaffected
platforms: MX Series
EX Series
product: Junos OS
vendor: Juniper Networks
versions: lessThan: 20.4R3-S9
status: affected
version: 0
versionType: semver
lessThan: 21.2R3-S7
status: affected
version: 21.2
versionType: semver
lessThan: 21.3R3-S5
status: affected
version: 21.3
versionType: semver
lessThan: 21.4R3-S5
status: affected
version: 21.4
versionType: semver
lessThan: 22.1R3-S4
status: affected
version: 22.1
versionType: semver
lessThan: 22.2R3-S3
status: affected
version: 22.2
versionType: semver
lessThan: 22.3R3-S2
status: affected
version: 22.3
versionType: semver
lessThan: 22.4R2-S2, 22.4R3
status: affected
version: 22.4
versionType: semver
lessThan: 23.2R2
status: affected
version: 23.2
versionType: semver
configurations: supportingMedia: base64: no
type: text/html
value: <p>To be affected a device must be configured with:</p><code>  [ forwarding-options dhcp-relay group &lt;group-name&gt; interface ... ]</code><br/><p>or</p><code>  [ system services dhcp-local-server group &lt;group-name&gt; interface ... ]</code><br/>
value: To be affected a device must be configured with:

  [ forwarding-options dhcp-relay group <group-name> interface ... ]
or

  [ system services dhcp-local-server group <group-name> interface ... ]

datePublic: 2024-01-10T17:00:00.000Z
descriptions: supportingMedia: base64: no
type: text/html
value: 

<p>An Improper Check for Unusual or Exceptional Conditions vulnerability in Juniper DHCP Daemon (jdhcpd) of Juniper Networks Junos OS allows an adjacent, unauthenticated attacker to cause the jdhcpd to consume all the CPU cycles resulting in a Denial of Service (DoS).</p><p>On Junos OS devices with forward-snooped-client configured, if an attacker sends a specific DHCP packet to a non-configured interface, this will cause an infinite loop. The DHCP process will have to be restarted to recover the service.</p><p>This issue affects:</p><p>Juniper Networks Junos OS</p><p></p><ul><li>All versions earlier than 20.4R3-S9;</li><li>21.2 versions earlier than 21.2R3-S7;</li><li>21.3 versions earlier than 21.3R3-S5;</li><li>21.4 versions earlier than 21.4R3-S5;</li><li>22.1 versions earlier than 22.1R3-S4;</li><li>22.2 versions earlier than 22.2R3-S3;</li><li>22.3 versions earlier than 22.3R3-S2;</li><li>22.4 versions earlier than 22.4R2-S2, 22.4R3;</li><li>23.2 versions earlier than 23.2R2.</li></ul><p></p>


value: 
An Improper Check for Unusual or Exceptional Conditions vulnerability in Juniper DHCP Daemon (jdhcpd) of Juniper Networks Junos OS allows an adjacent, unauthenticated attacker to cause the jdhcpd to consume all the CPU cycles resulting in a Denial of Service (DoS).

On Junos OS devices with forward-snooped-client configured, if an attacker sends a specific DHCP packet to a non-configured interface, this will cause an infinite loop. The DHCP process will have to be restarted to recover the service.

This issue affects:

Juniper Networks Junos OS



  *  All versions earlier than 20.4R3-S9;
  *  21.2 versions earlier than 21.2R3-S7;
  *  21.3 versions earlier than 21.3R3-S5;
  *  21.4 versions earlier than 21.4R3-S5;
  *  22.1 versions earlier than 22.1R3-S4;
  *  22.2 versions earlier than 22.2R3-S3;
  *  22.3 versions earlier than 22.3R3-S2;
  *  22.4 versions earlier than 22.4R2-S2, 22.4R3;
  *  23.2 versions earlier than 23.2R2.







exploits: supportingMedia: base64: no
type: text/html
value: <p>Juniper SIRT is not aware of any malicious exploitation of this vulnerability.</p>
value: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.


metrics: cvssV3_1: attackComplexity: LOW
attackVector: ADJACENT_NETWORK
availabilityImpact: HIGH
baseScore: 6.5
baseSeverity: MEDIUM
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
version: 3.1
format: CVSS
scenarios: value: GENERAL
problemTypes: descriptions: cweId: CWE-703
description: CWE-703: Improper Check or Handling of Exceptional Conditions
type: CWE
descriptions: description: Denial of Service (DoS)
solutions: supportingMedia: base64: no
type: text/html
value: <p>The following software releases have been updated to resolve this specific issue: Junos OS 20.4R3-S9, 21.2R3-S7, 21.3R3-S5, 21.4R3-S5, 22.1R3-S4, 22.2R3-S3, 22.3R3-S2, 22.4R2-S2, 22.4R3, 23.2R1-S2, 23.2R2, 23.4R1, and all subsequent releases.</p>
value: The following software releases have been updated to resolve this specific issue: Junos OS 20.4R3-S9, 21.2R3-S7, 21.3R3-S5, 21.4R3-S5, 22.1R3-S4, 22.2R3-S3, 22.3R3-S2, 22.4R2-S2, 22.4R3, 23.2R1-S2, 23.2R2, 23.4R1, and all subsequent releases.


source: advisory: JSA75730
defect: 1706709
discovery: USER
timeline: time: 2024-01-10T17:00:00.000Z
value: Initial Publication
title: Junos OS: jdhcpd will hang on receiving a specific DHCP packet
workarounds: supportingMedia: base64: no
type: text/html
value: <p>There are no known workarounds for this issue.</p>
value: There are no known workarounds for this issue.


x_generator: engine: Vulnogram 0.1.0-av217