Article Detail

Product Affected

This issue affects all versions of Junos OS on SRX Series.

Severity

High

Severity Assessment (CVSS) Score

CVSS: v3.1: 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVSS: v4.0: 8.7 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/RE:M)

Problem

An Improper Check for Unusual or Exceptional Conditions vulnerability in the flow processing daemon (flowd) of Juniper Networks Junos OS on SRX1600, SRX2300, SRX 4000 Series, and SRX5000 Series with SPC3 allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).

If a sequence of specific PIM packets is received, this will cause a flowd crash and restart.

This issue affects Junos OS:

all versions before 21.2R3-S9,
21.4 versions before 21.4R3-S11,
22.2 versions before 22.2R3-S7,
22.4 versions before 22.4R3-S6,
23.2 versions before 23.2R2-S4,
23.4 versions before 23.4R2-S4,
24.2 versions before 24.2R2.

This is a similar, but different vulnerability than the issue reported as CVE-2024-47503, published in JSA88133 [juniper.net].

Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

This issue was seen during production usage.

Solution

The following software releases have been updated to resolve this specific issue: 21.2R3-S9, 21.4R3-S11, 22.2R3-S7, 22.4R3-S6, 23.2R2-S4, 23.4R2-S4, 24.2R2, 24.4R1, and all subsequent releases.

This issue is being tracked as 1839910 which is visible on the Customer Support website.

Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL).

Workaround

Minimize the PIM (Protocol Independent Multicast) session timeout value to be less than 5 seconds to avoid data session creation errors.

Severity Assessment

Information for how Juniper Networks uses CVSS can be found at KB 16446 [juniper.net] "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."

Modification History

2025-07-09: Initial Publication