Paper/Archive/CVE-2024-21591

CVE-2024-21591

Juniper Networks Junos OS — Junos OS: SRX Series and EX Series: Security Vulnerability in J-web allows a preAuth Remote Code Execution

Description · from the CVE record

An Out-of-bounds Write vulnerability in J-Web of Juniper Networks Junos OS on SRX Series and EX Series allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS), or Remote Code Execution (RCE) and obtain root privileges on the device. This issue is caused by use of an insecure function allowing an attacker to overwrite arbitrary memory. This issue affects Juniper Networks Junos OS SRX Series and EX Series: * Junos OS versions earlier than 20.4R3-S9; * Junos OS 21.2 versions earlier than 21.2R3-S7; * Junos OS 21.3 versions earlier than 21.3R3-S5; * Junos OS 21.4 versions earlier than 21.4R3-S5; * Junos OS 22.1 versions earlier than 22.1R3-S4; * Junos OS 22.2 versions earlier than 22.2R3-S3; * Junos OS 22.3 versions earlier than 22.3R3-S2; * Junos OS 22.4 versions earlier than 22.4R2-S2, 22.4R3.

Affected

ProductAffectedFixed inSource
Junos OS< 20.4R3-S920.4R3-S9CNA
Junos OS21.2 – < 21.2R3-S721.2R3-S7CNA
Junos OS21.3 – < 21.3R3-S521.3R3-S5CNA
Junos OS21.4 – < 21.4R3-S521.4R3-S5CNA
Junos OS22.1 – < 22.1R3-S422.1R3-S4CNA
Junos OS22.2 – < 22.2R3-S322.2R3-S3CNA
Junos OS22.3 – < 22.3R3-S222.3R3-S2CNA
Junos OS22.4 – < 22.4R2-S2, 22.4R322.4R2-S2, 22.4R3CNA

Scores by source

juniper (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

advisorysupportportal.juniper.net/JSA75729writeupfirst.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:Nwriteupcuresec.com/blog/article/CVE-2024-21591_Juniper_Remote_Code_Exec.html