Vulnerability Monitor

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CVE-2023-36838

An Out-of-bounds Read vulnerability in the flow processing daemon (flowd) of Juniper Networks Junos OS on SRX Series allows a local, authenticated attacker with low privileges, to cause a Denial of Service (DoS). If a low privileged user executes a specific CLI command, flowd which is responsible for traffic forwarding in SRX crashes and generates a core dump. This will cause temporary traffic interruption until the flowd process is restarted automatically. Continued execution of this command will lead to a sustained DoS. This issue affects Juniper Networks Junos OS on SRX Series: All versions prior to 20.2R3-S7; 20.3 version 20.3R1 and later versions; 20.4 versions prior to 20.4R3-S6; 21.1 versions prior to 21.1R3-S5; 21.2 versions prior to 21.2R3-S4; 21.3 versions prior to 21.3R3-S4; 21.4 versions prior to 21.4R3-S3; 22.1 versions prior to 22.1R3-S1; 22.2 versions prior to 22.2R3; 22.3 versions prior to 22.3R2; 22.4 versions prior to 22.4R1-S1, 22.4R2.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.5, requiring local system access to exploit with relatively low complexity without requiring user interaction requiring only low-level privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 31 products from juniper, from juniper, from juniper and 28 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2023, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2023-07-14T17:15:09.210

Last Modified

2024-11-21T08:10:42.900

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.5 (MEDIUM)

Weaknesses

Type: Secondary
CWE-125

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	juniper	junos	< 20.2	Yes
Operating System	juniper	junos	20.2	Yes
Operating System	juniper	junos	20.2	Yes
Operating System	juniper	junos	20.2	Yes
Operating System	juniper	junos	20.2	Yes
Operating System	juniper	junos	20.2	Yes
Operating System	juniper	junos	20.2	Yes
Operating System	juniper	junos	20.2	Yes
Operating System	juniper	junos	20.2	Yes
Operating System	juniper	junos	20.2	Yes
Operating System	juniper	junos	20.2	Yes
Operating System	juniper	junos	20.2	Yes
Operating System	juniper	junos	20.2	Yes
Operating System	juniper	junos	20.2	Yes
Operating System	juniper	junos	20.2	Yes
Operating System	juniper	junos	20.2	Yes
Operating System	juniper	junos	20.2	Yes
Operating System	juniper	junos	20.3	Yes
Operating System	juniper	junos	20.3	Yes
Operating System	juniper	junos	20.3	Yes
Operating System	juniper	junos	20.3	Yes
Operating System	juniper	junos	20.3	Yes
Operating System	juniper	junos	20.3	Yes
Operating System	juniper	junos	20.3	Yes
Operating System	juniper	junos	20.3	Yes
Operating System	juniper	junos	20.3	Yes
Operating System	juniper	junos	20.3	Yes
Operating System	juniper	junos	20.3	Yes
Operating System	juniper	junos	20.3	Yes
Operating System	juniper	junos	20.4	Yes
Operating System	juniper	junos	20.4	Yes
Operating System	juniper	junos	20.4	Yes
Operating System	juniper	junos	20.4	Yes
Operating System	juniper	junos	20.4	Yes
Operating System	juniper	junos	20.4	Yes
Operating System	juniper	junos	20.4	Yes
Operating System	juniper	junos	20.4	Yes
Operating System	juniper	junos	20.4	Yes
Operating System	juniper	junos	20.4	Yes
Operating System	juniper	junos	20.4	Yes
Operating System	juniper	junos	20.4	Yes
Operating System	juniper	junos	21.1	Yes
Operating System	juniper	junos	21.1	Yes
Operating System	juniper	junos	21.1	Yes
Operating System	juniper	junos	21.1	Yes
Operating System	juniper	junos	21.1	Yes
Operating System	juniper	junos	21.1	Yes
Operating System	juniper	junos	21.1	Yes
Operating System	juniper	junos	21.1	Yes
Operating System	juniper	junos	21.1	Yes
Operating System	juniper	junos	21.1	Yes
Operating System	juniper	junos	21.1	Yes
Operating System	juniper	junos	21.2	Yes
Operating System	juniper	junos	21.2	Yes
Operating System	juniper	junos	21.2	Yes
Operating System	juniper	junos	21.2	Yes
Operating System	juniper	junos	21.2	Yes
Operating System	juniper	junos	21.2	Yes
Operating System	juniper	junos	21.2	Yes
Operating System	juniper	junos	21.2	Yes
Operating System	juniper	junos	21.2	Yes
Operating System	juniper	junos	21.2	Yes
Operating System	juniper	junos	21.2	Yes
Operating System	juniper	junos	21.3	Yes
Operating System	juniper	junos	21.3	Yes
Operating System	juniper	junos	21.3	Yes
Operating System	juniper	junos	21.3	Yes
Operating System	juniper	junos	21.3	Yes
Operating System	juniper	junos	21.3	Yes
Operating System	juniper	junos	21.3	Yes
Operating System	juniper	junos	21.3	Yes
Operating System	juniper	junos	21.3	Yes
Operating System	juniper	junos	21.3	Yes
Operating System	juniper	junos	21.3	Yes
Operating System	juniper	junos	21.4	Yes
Operating System	juniper	junos	21.4	Yes
Operating System	juniper	junos	21.4	Yes
Operating System	juniper	junos	21.4	Yes
Operating System	juniper	junos	21.4	Yes
Operating System	juniper	junos	21.4	Yes
Operating System	juniper	junos	21.4	Yes
Operating System	juniper	junos	21.4	Yes
Operating System	juniper	junos	21.4	Yes
Operating System	juniper	junos	21.4	Yes
Operating System	juniper	junos	22.1	Yes
Operating System	juniper	junos	22.1	Yes
Operating System	juniper	junos	22.1	Yes
Operating System	juniper	junos	22.1	Yes
Operating System	juniper	junos	22.1	Yes
Operating System	juniper	junos	22.1	Yes
Operating System	juniper	junos	22.1	Yes
Operating System	juniper	junos	22.2	Yes
Operating System	juniper	junos	22.2	Yes
Operating System	juniper	junos	22.2	Yes
Operating System	juniper	junos	22.2	Yes
Operating System	juniper	junos	22.2	Yes
Operating System	juniper	junos	22.2	Yes
Operating System	juniper	junos	22.3	Yes
Operating System	juniper	junos	22.3	Yes
Operating System	juniper	junos	22.3	Yes
Operating System	juniper	junos	22.4	Yes
Application	juniper	vsrx	-	No
Hardware	juniper	csrx	-	No
Hardware	juniper	srx100	-	No
Hardware	juniper	srx110	-	No
Hardware	juniper	srx1400	-	No
Hardware	juniper	srx1500	-	No
Hardware	juniper	srx210	-	No
Hardware	juniper	srx220	-	No
Hardware	juniper	srx240	-	No
Hardware	juniper	srx240h2	-	No
Hardware	juniper	srx240m	-	No
Hardware	juniper	srx300	-	No
Hardware	juniper	srx320	-	No
Hardware	juniper	srx340	-	No
Hardware	juniper	srx3400	-	No
Hardware	juniper	srx345	-	No
Hardware	juniper	srx3600	-	No
Hardware	juniper	srx380	-	No
Hardware	juniper	srx4000	-	No
Hardware	juniper	srx4100	-	No
Hardware	juniper	srx4200	-	No
Hardware	juniper	srx4600	-	No
Hardware	juniper	srx5000	-	No
Hardware	juniper	srx5400	-	No
Hardware	juniper	srx550	-	No
Hardware	juniper	srx550_hm	-	No
Hardware	juniper	srx550m	-	No
Hardware	juniper	srx5600	-	No
Hardware	juniper	srx5800	-	No
Hardware	juniper	srx650	-	No

References

https://supportportal.juniper.net/JSA71645 Vendor Advisory ([email protected])
https://supportportal.juniper.net/JSA71645 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For juniper's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.