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CVE-2024-39551

HIGHCVSS 8.7/10EPSS 0.48%

Last modified

CVE-2024-39551 is a high-severity vulnerability rated 8.7/10 on the CVSS scale. An Uncontrolled Resource Consumption vulnerability in the H.323 ALG (Application Layer Gateway) of  Juniper Networks Junos OS on SRX Series and MX Series with SPC3 and MS-MPC/MIC, allows an unauthenticated network-based attacker to send specific packets causing traffic loss leading to Denial of Service (DoS).  Continued receipt and processing of these specific packets will sustain the Denial of Service condition. The memory usage can be monitored using the below command.   user@host> show usp memory segment sha data objcache jsf  This issue affects SRX Series and MX Series with SPC3 and MS-MPC/MIC:  *  20.4 before 20.4R3-S10,  *  21.2 before 21.2R3-S6,  *  21.3 before 21.3R3-S5,  *  21.4 before 21.4R3-S6,  *  22.1 before 22.1R3-S4,  *  22.2 before 22.2R3-S2,  *  22.3 before 22.3R3-S1,  *  22.4 before 22.4R3,  *  23.2 before 23.2R2.. EPSS estimates a 0.48% chance of exploitation in the next 30 days.

Description

An Uncontrolled Resource Consumption vulnerability in the H.323 ALG (Application Layer Gateway) of  Juniper Networks Junos OS on SRX Series and MX Series with SPC3 and MS-MPC/MIC, allows an unauthenticated network-based attacker to send specific packets causing traffic loss leading to Denial of Service (DoS).  Continued receipt and processing of these specific packets will sustain the Denial of Service condition. The memory usage can be monitored using the below command.   user@host> show usp memory segment sha data objcache jsf  This issue affects SRX Series and MX Series with SPC3 and MS-MPC/MIC:  *  20.4 before 20.4R3-S10,  *  21.2 before 21.2R3-S6,  *  21.3 before 21.3R3-S5,  *  21.4 before 21.4R3-S6,  *  22.1 before 22.1R3-S4,  *  22.2 before 22.2R3-S2,  *  22.3 before 22.3R3-S1,  *  22.4 before 22.4R3,  *  23.2 before 23.2R2.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS 4.0
8.7/10

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability
0.48%

37.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
JuniperJunos20.4
JuniperJunos21.2
JuniperJunos21.3
JuniperJunos21.4
JuniperJunos22.1
JuniperJunos22.2
JuniperJunos22.3
JuniperJunos22.4
JuniperJunos23.2

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2024-39551?
An Uncontrolled Resource Consumption vulnerability in the H.323 ALG (Application Layer Gateway) of  Juniper Networks Junos OS on SRX Series and MX Series with SPC3 and MS-MPC/MIC, allows an unauthenticated network-based attacker to send specific packets causing traffic loss leading to Denial of Service (DoS).  Continued receipt and processing of these specific packets will sustain the Denial of Service condition. The memory usage can be monitored using the below command.   user@host> show usp memory segment sha data objcache jsf  This issue affects SRX Series and MX Series with SPC3 and MS-MPC/MIC:  *  20.4 before 20.4R3-S10,  *  21.2 before 21.2R3-S6,  *  21.3 before 21.3R3-S5,  *  21.4 before 21.4R3-S6,  *  22.1 before 22.1R3-S4,  *  22.2 before 22.2R3-S2,  *  22.3 before 22.3R3-S1,  *  22.4 before 22.4R3,  *  23.2 before 23.2R2.
How severe is CVE-2024-39551?
CVE-2024-39551 has a CVSS score of 8.7/10 (HIGH severity). The EPSS model estimates a 0.48% probability of exploitation in the next 30 days.
How do I fix CVE-2024-39551?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2024-39551?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST