CVE-2023-44199: Junos OS: MX Series: In a PTP scenario a prolonged routing protocol churn can trigger an FPC reboot
First published: Thu Oct 12 2023(Updated: )
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 network-based, unauthenticated attacker to cause a Denial of Service (DoS). On Junos MX Series platforms with Precision Time Protocol (PTP) configured, a prolonged routing protocol churn can lead to an FPC crash and restart. This issue affects Juniper Networks Junos OS on MX Series: * All versions prior to 20.4R3-S4; * 21.1 version 21.1R1 and later versions; * 21.2 versions prior to 21.2R3-S2; * 21.3 versions prior to 21.3R3-S5; * 21.4 versions prior to 21.4R3; * 22.1 versions prior to 22.1R3; * 22.2 versions prior to 22.2R1-S1, 22.2R2.
Credit: sirt@juniper.net
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Junos OS Evolved | <20.4 | |
| Junos OS Evolved | =20.4 | |
| Junos OS Evolved | =20.4-r1 | |
| Junos OS Evolved | =20.4-r1-s1 | |
| Junos OS Evolved | =20.4-r2 | |
| Junos OS Evolved | =20.4-r2-s1 | |
| Junos OS Evolved | =20.4-r2-s2 | |
| Junos OS Evolved | =20.4-r3 | |
| Junos OS Evolved | =20.4-r3-s1 | |
| Junos OS Evolved | =20.4-r3-s2 | |
| Junos OS Evolved | =20.4-r3-s3 | |
| Junos OS Evolved | =21.1-r1 | |
| Junos OS Evolved | =21.1-r1-s1 | |
| Junos OS Evolved | =21.1-r2 | |
| Junos OS Evolved | =21.1-r2-s1 | |
| Junos OS Evolved | =21.1-r2-s2 | |
| Junos OS Evolved | =21.1-r3 | |
| Junos OS Evolved | =21.1-r3-s1 | |
| Junos OS Evolved | =21.1-r3-s2 | |
| Junos OS Evolved | =21.1-r3-s3 | |
| Junos OS Evolved | =21.1-r3-s4 | |
| Junos OS Evolved | =21.1-r3-s5 | |
| Junos OS Evolved | =21.2 | |
| Junos OS Evolved | =21.2-r1 | |
| Junos OS Evolved | =21.2-r1-s1 | |
| Junos OS Evolved | =21.2-r1-s2 | |
| Junos OS Evolved | =21.2-r2 | |
| Junos OS Evolved | =21.2-r2-s1 | |
| Junos OS Evolved | =21.2-r2-s2 | |
| Junos OS Evolved | =21.2-r3 | |
| Junos OS Evolved | =21.2-r3-s1 | |
| Junos OS Evolved | =21.2-r3-s2 | |
| Junos OS Evolved | =21.3 | |
| Junos OS Evolved | =21.3-r1 | |
| Junos OS Evolved | =21.3-r1-s1 | |
| Junos OS Evolved | =21.3-r1-s2 | |
| Junos OS Evolved | =21.3-r2 | |
| Junos OS Evolved | =21.3-r2-s1 | |
| Junos OS Evolved | =21.3-r2-s2 | |
| Junos OS Evolved | =21.3-r3 | |
| Junos OS Evolved | =21.3-r3-s1 | |
| Junos OS Evolved | =21.3-r3-s2 | |
| Junos OS Evolved | =21.3-r3-s3 | |
| Junos OS Evolved | =21.3-r3-s4 | |
| Junos OS Evolved | =21.4 | |
| Junos OS Evolved | =21.4-r1 | |
| Junos OS Evolved | =21.4-r1-s1 | |
| Junos OS Evolved | =21.4-r1-s2 | |
| Junos OS Evolved | =21.4-r2 | |
| Junos OS Evolved | =21.4-r2-s1 | |
| Junos OS Evolved | =21.4-r2-s2 | |
| Junos OS Evolved | =22.1 | |
| Junos OS Evolved | =22.1-r1 | |
| Junos OS Evolved | =22.1-r1-s1 | |
| Junos OS Evolved | =22.1-r1-s2 | |
| Junos OS Evolved | =22.1-r2 | |
| Junos OS Evolved | =22.1-r2-s1 | |
| Junos OS Evolved | =22.1-r2-s2 | |
| Junos OS Evolved | =22.2 | |
| Junos OS Evolved | =22.2-r1 | |
| Juniper MX10003 | ||
| Juniper MX10004 | ||
| Juniper MX10008 | ||
| Juniper MX2008 | ||
| Juniper MX2010 | ||
| Juniper MX2020 | ||
| Juniper MX204 | ||
| Juniper MX240 | ||
| Juniper MX304 | ||
| Juniper MX480 | ||
| Juniper MX960 |
Remedy
The following software releases have been updated to resolve this specific issue: Junos OS 20.4R3-S4, 21.2R3-S2, 21.3R3-S5, 21.4R3, 22.1R3, 22.2R1-S1, 22.2R2, 22.3R1, and all subsequent releases.
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2023-44199?
CVE-2023-44199 is classified as a Denial of Service (DoS) vulnerability.
How does CVE-2023-44199 affect Juniper Networks devices?
CVE-2023-44199 allows an unauthenticated attacker to cause a Denial of Service on affected Junos OS devices.
Which versions of Junos OS are impacted by CVE-2023-44199?
CVE-2023-44199 affects Junos OS versions up to 20.4 and specific versions in the 21.x and 22.x series.
How do I mitigate CVE-2023-44199?
To mitigate CVE-2023-44199, users should upgrade to the fixed versions provided by Juniper Networks.
What should I do if I suspect exploitation of CVE-2023-44199 on my network?
If you suspect exploitation of CVE-2023-44199, immediately implement network segmentation and apply security updates.
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