CVE-2023-36841 Details
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;
View at NVD
Exploit prediction scoring system (EPSS) score for CVE-2023-36841
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
0.13 Probability of exploitation activity being observed over the next 30 days (33nd percentile)
CVSS score for CVE-2023-36841
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
7.5 High
Products affected by CVE-2023-36841
Junos 21.3
Junos 21.4
Junos 22.1
Junos 22.2
Junos 22.3
DVE Score by Bitsight AI
DVE scores complement traditional static scoring systems like CVSS with Bitsight AI powered real-time threat intelligence and underground cyber criminal activity so that security teams can reduce alert fatigue and focus on vulnerabilities most likely to be exploited.
Not available
More on DVE scores

CVE-2023-36841 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
NA 26 26.53%
PK 8 8.16%
CA 6 6.12%
TW 6 6.12%
BD 5 5.10%
CN 4 4.08%
VN 4 4.08%
VE 4 4.08%
KR 4 4.08%
ZM 3 3.06%

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CVE-2023-36841 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Telecommunications 60 90.91%
Technology 3 4.55%
Manufacturing 1 1.52%
Consumer Goods 1 1.52%
Business Services 1 1.52%

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