CVE-2023-36836: Junos OS and Junos OS Evolved: In a MoFRR scenario an rpd core may be observed when a low privileged CLI command is executed

Published Jul 14, 2023
·
Updated

A Use of an Uninitialized Resource vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a local, authenticated attacker with low privileges to cause a Denial of Service (DoS).

On all Junos OS and Junos OS Evolved platforms, in a Multicast only Fast Reroute (MoFRR) scenario, the rpd process can crash when a a specific low privileged CLI command is executed. The rpd crash will impact all routing protocols until the process has automatically been restarted. As the operational state which makes this issue exploitable is outside the attackers control, this issue is considered difficult to exploit. Continued execution of this command will lead to a sustained DoS.

This issue affects: Juniper Networks Junos OS 19.4 version 19.4R3-S5 and later versions prior to 19.4R3-S9; 20.1 version 20.1R2 and later versions; 20.2 versions prior to 20.2R3-S7; 20.3 versions prior to 20.3R3-S5; 20.4 versions prior to 20.4R3-S6; 21.1 versions prior to 21.1R3-S4; 21.2 versions prior to 21.2R3-S2; 21.3 versions prior to 21.3R3-S1; 21.4 versions prior to 21.4R3; 22.1 versions prior to 22.1R1-S2, 22.1R2; 22.2 versions prior to 22.2R2.

Juniper Networks Junos OS Evolved All versions prior to 20.4R3-S6-EVO; 21.1-EVO version 21.1R1-EVO and later versions; 21.2-EVO version 21.2R1-EVO and later versions; 21.3-EVO versions prior to 21.3R3-S1-EVO; 21.4-EVO versions prior to 21.4R3-EVO; 22.1-EVO versions prior to 22.1R1-S2-EVO, 22.1R2-EVO; 22.2-EVO versions prior to 22.2R2-EVO.

Affected Software

173 affected components
Juniper JUNOS=19.4
Juniper JUNOS=19.4-r1
Juniper JUNOS=19.4-r1-s1
Juniper JUNOS=19.4-r1-s2
Juniper JUNOS=19.4-r1-s3
Juniper JUNOS=19.4-r1-s4
Juniper JUNOS=19.4-r2
Juniper JUNOS=19.4-r2-s1
Juniper JUNOS=19.4-r2-s2
Juniper JUNOS=19.4-r2-s3
Juniper JUNOS=19.4-r2-s4
Juniper JUNOS=19.4-r2-s5
Juniper JUNOS=19.4-r2-s6
Juniper JUNOS=19.4-r2-s7
Juniper JUNOS=19.4-r3
Juniper JUNOS=19.4-r3-s1
Juniper JUNOS=19.4-r3-s10
Juniper JUNOS=19.4-r3-s11
Juniper JUNOS=19.4-r3-s12
Juniper JUNOS=19.4-r3-s2
Juniper JUNOS=19.4-r3-s3
Juniper JUNOS=19.4-r3-s4
Juniper JUNOS=19.4-r3-s5
Juniper JUNOS=19.4-r3-s6
Juniper JUNOS=19.4-r3-s7
Juniper JUNOS=19.4-r3-s8
Juniper JUNOS=20.1
Juniper JUNOS=20.1-r1
Juniper JUNOS=20.1-r1-s1
Juniper JUNOS=20.1-r1-s2
Juniper JUNOS=20.1-r1-s3
Juniper JUNOS=20.1-r1-s4
Juniper JUNOS=20.1-r2
Juniper JUNOS=20.1-r2-s1
Juniper JUNOS=20.1-r2-s2
Juniper JUNOS=20.1-r3
Juniper JUNOS=20.1-r3-s1
Juniper JUNOS=20.1-r3-s2
Juniper JUNOS=20.1-r3-s3
Juniper JUNOS=20.1-r3-s4
Juniper JUNOS=20.1-r3-s5
Juniper JUNOS=20.2
Juniper JUNOS=20.2-r1
Juniper JUNOS=20.2-r1-s1
Juniper JUNOS=20.2-r1-s2
Juniper JUNOS=20.2-r1-s3
Juniper JUNOS=20.2-r2
Juniper JUNOS=20.2-r2-s1
Juniper JUNOS=20.2-r2-s2
Juniper JUNOS=20.2-r2-s3
Juniper JUNOS=20.2-r3
Juniper JUNOS=20.2-r3-s1
Juniper JUNOS=20.2-r3-s2
Juniper JUNOS=20.2-r3-s3
Juniper JUNOS=20.2-r3-s4
Juniper JUNOS=20.2-r3-s5
Juniper JUNOS=20.2-r3-s6
Juniper JUNOS=20.3
Juniper JUNOS=20.3-r1
Juniper JUNOS=20.3-r1-s1
Juniper JUNOS=20.3-r1-s2
Juniper JUNOS=20.3-r2
Juniper JUNOS=20.3-r2-s1
Juniper JUNOS=20.3-r3
Juniper JUNOS=20.3-r3-s1
Juniper JUNOS=20.3-r3-s2
Juniper JUNOS=20.3-r3-s3
Juniper JUNOS=20.3-r3-s4
Juniper JUNOS=20.4
Juniper JUNOS=20.4-r1
Juniper JUNOS=20.4-r1-s1
Juniper JUNOS=20.4-r2
Juniper JUNOS=20.4-r2-s1
Juniper JUNOS=20.4-r2-s2
Juniper JUNOS=20.4-r3
Juniper JUNOS=20.4-r3-s1
Juniper JUNOS=20.4-r3-s2
Juniper JUNOS=20.4-r3-s3
Juniper JUNOS=20.4-r3-s4
Juniper JUNOS=20.4-r3-s5
Juniper JUNOS=21.1
Juniper JUNOS=21.1-r1
Juniper JUNOS=21.1-r1-s1
Juniper JUNOS=21.1-r2
Juniper JUNOS=21.1-r2-s1
Juniper JUNOS=21.1-r2-s2
Juniper JUNOS=21.1-r3
Juniper JUNOS=21.1-r3-s1
Juniper JUNOS=21.1-r3-s2
Juniper JUNOS=21.1-r3-s3
Juniper JUNOS=21.2
Juniper JUNOS=21.2-r1
Juniper JUNOS=21.2-r1-s1
Juniper JUNOS=21.2-r1-s2
Juniper JUNOS=21.2-r2
Juniper JUNOS=21.2-r2-s1
Juniper JUNOS=21.2-r2-s2
Juniper JUNOS=21.2-r3
Juniper JUNOS=21.2-r3-s1
Juniper JUNOS=21.3
Juniper JUNOS=21.3-r1
Juniper JUNOS=21.3-r1-s1
Juniper JUNOS=21.3-r1-s2
Juniper JUNOS=21.3-r2
Juniper JUNOS=21.3-r2-s1
Juniper JUNOS=21.3-r2-s2
Juniper JUNOS=21.3-r3
Juniper JUNOS=21.4
Juniper JUNOS=21.4-r1
Juniper JUNOS=21.4-r1-s1
Juniper JUNOS=21.4-r1-s2
Juniper JUNOS=21.4-r2
Juniper JUNOS=21.4-r2-s1
Juniper JUNOS=21.4-r2-s2
Juniper JUNOS=22.1-r1
Juniper JUNOS=22.1-r1-s1
Juniper JUNOS=22.2-r1
Juniper JUNOS=22.2-r1-s1
Juniper JUNOS=22.2-r1-s2
Juniper Junos OS Evolved<20.4
Juniper Junos OS Evolved=20.4
Juniper Junos OS Evolved=20.4-r1
Juniper Junos OS Evolved=20.4-r1-s1
Juniper Junos OS Evolved=20.4-r1-s2
Juniper Junos OS Evolved=20.4-r2
Juniper Junos OS Evolved=20.4-r2-s1
Juniper Junos OS Evolved=20.4-r2-s2
Juniper Junos OS Evolved=20.4-r2-s3
Juniper Junos OS Evolved=20.4-r3
Juniper Junos OS Evolved=20.4-r3-s1
Juniper Junos OS Evolved=20.4-r3-s2
Juniper Junos OS Evolved=20.4-r3-s3
Juniper Junos OS Evolved=20.4-r3-s4
Juniper Junos OS Evolved=20.4-r3-s5
Juniper Junos OS Evolved=21.1
Juniper Junos OS Evolved=21.1-r1
Juniper Junos OS Evolved=21.1-r1-s1
Juniper Junos OS Evolved=21.1-r2
Juniper Junos OS Evolved=21.1-r3
Juniper Junos OS Evolved=21.1-r3-s1
Juniper Junos OS Evolved=21.1-r3-s2
Juniper Junos OS Evolved=21.1-r3-s3
Juniper Junos OS Evolved=21.2
Juniper Junos OS Evolved=21.2-r1
Juniper Junos OS Evolved=21.2-r1-s1
Juniper Junos OS Evolved=21.2-r1-s2
Juniper Junos OS Evolved=21.2-r2
Juniper Junos OS Evolved=21.2-r2-s1
Juniper Junos OS Evolved=21.2-r2-s2
Juniper Junos OS Evolved=21.2-r3
Juniper Junos OS Evolved=21.2-r3-s1
Juniper Junos OS Evolved=21.2-r3-s2
Juniper Junos OS Evolved=21.2-r3-s3
Juniper Junos OS Evolved=21.2-r3-s4
Juniper Junos OS Evolved=21.2-r3-s5
Juniper Junos OS Evolved=21.3
Juniper Junos OS Evolved=21.3-r1
Juniper Junos OS Evolved=21.3-r1-s1
Juniper Junos OS Evolved=21.3-r2
Juniper Junos OS Evolved=21.3-r2-s1
Juniper Junos OS Evolved=21.3-r2-s2
Juniper Junos OS Evolved=21.3-r3
Juniper Junos OS Evolved=21.4
Juniper Junos OS Evolved=21.4-r1
Juniper Junos OS Evolved=21.4-r1-s1
Juniper Junos OS Evolved=21.4-r1-s2
Juniper Junos OS Evolved=21.4-r2
Juniper Junos OS Evolved=21.4-r2-s1
Juniper Junos OS Evolved=21.4-r2-s2
Juniper Junos OS Evolved=22.1-r1
Juniper Junos OS Evolved=22.1-r1-s1
Juniper Junos OS Evolved=22.2-r1
Juniper Junos OS Evolved=22.2-r1-s1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade Juniper Networks Junos OS and Junos OS Evolved to a version that resolves this vulnerability.

    Fixed in 20.4R3-S6-EVO
  2. Upgrade

    Upgrade Juniper Networks Junos OS and Junos OS Evolved to a version that resolves this vulnerability.

    Fixed in 21.3R3-S1-EVO
  3. Upgrade

    Upgrade Juniper Networks Junos OS and Junos OS Evolved to a version that resolves this vulnerability.

    Fixed in 21.4R3-EVO
  4. Upgrade

    Upgrade Juniper Networks Junos OS and Junos OS Evolved to a version that resolves this vulnerability.

    Fixed in 22.1R1-S2-EVO
  5. Upgrade

    Upgrade Juniper Networks Junos OS and Junos OS Evolved to a version that resolves this vulnerability.

    Fixed in 22.1R2-EVO
  6. Upgrade

    Upgrade Juniper Networks Junos OS and Junos OS Evolved to a version that resolves this vulnerability.

    Fixed in 22.2R2-EVO
  7. Upgrade

    Upgrade Juniper Networks Junos OS to a version that resolves this vulnerability.

    Fixed in 19.4R3-S9
  8. Upgrade

    Upgrade Juniper Networks Junos OS to a version that resolves this vulnerability.

    Fixed in 20.2R3-S7
  9. Upgrade

    Upgrade Juniper Networks Junos OS to a version that resolves this vulnerability.

    Fixed in 20.3R3-S5
  10. Upgrade

    Upgrade Juniper Networks Junos OS to a version that resolves this vulnerability.

    Fixed in 20.4R3-S6
  11. Upgrade

    Upgrade Juniper Networks Junos OS to a version that resolves this vulnerability.

    Fixed in 21.1R3-S4
  12. Upgrade

    Upgrade Juniper Networks Junos OS to a version that resolves this vulnerability.

    Fixed in 21.2R3-S2
  13. Upgrade

    Upgrade Juniper Networks Junos OS to a version that resolves this vulnerability.

    Fixed in 21.3R3-S1
  14. Upgrade

    Upgrade Juniper Networks Junos OS to a version that resolves this vulnerability.

    Fixed in 21.4R3
  15. Upgrade

    Upgrade Juniper Networks Junos OS to a version that resolves this vulnerability.

    Fixed in 22.1R1-S2
  16. Upgrade

    Upgrade Juniper Networks Junos OS to a version that resolves this vulnerability.

    Fixed in 22.1R2
  17. Upgrade

    Upgrade Juniper Networks Junos OS to a version that resolves this vulnerability.

    Fixed in 22.2R2
  18. Upgrade

    Upgrade Juniper Networks Junos OS to a version that resolves this vulnerability.

    Fixed in 22.3R1

Event History

Jul 14, 2023
CVE Published
via MITRE·05:33 PM
Data Sourced
via MITRE·05:33 PM
RemedyDescriptionSeverityWeakness
Data Sourced
06:15 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·06:15 PM
DescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

1

What is the severity of CVE-2023-36836?

CVE-2023-36836 is classified as a Denial of Service vulnerability that can be exploited by low-privileged authenticated users.

2

How do I fix CVE-2023-36836?

To fix CVE-2023-36836, upgrade to the latest version of Junos OS as specified in Juniper Networks' security advisory.

3

Which Junos OS versions are affected by CVE-2023-36836?

CVE-2023-36836 affects multiple versions of Junos OS including 19.4, 20.1, 20.2, 20.3, 20.4, and 21.x.

4

What kind of attack can exploit CVE-2023-36836?

CVE-2023-36836 allows a local, authenticated attacker to exploit the vulnerability to cause a Denial of Service (DoS).

5

Is authentication required to exploit CVE-2023-36836?

Yes, exploitation of CVE-2023-36836 requires local authentication, meaning the attacker must already have low privileges on the system.

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