A Missing Authentication for Critical Function vulnerability in Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause limited impact to the file system integrity.

With a specific request that doesn't require authentication an attacker is able to upload arbitrary files via J-Web, leading to a loss of

integrity

for a certain 

part of the file system, which may allow chaining to other vulnerabilities.

This issue affects Juniper Networks Junos OS on SRX Series:

• All versions prior to 20.4R3-S8;
• 21.2 versions prior to 21.2R3-S6;
• 21.3 versions

prior to

21.3R3-S5;

• 21.4 versions

prior to

21.4R3-S5;

• 22.1 versions

prior to

22.1R3-S3;

• 22.2 versions

prior to

22.2R3-S2;

• 22.3 versions

prior to

22.3R2-S2, 22.3R3;

• 22.4 versions

prior to

22.4R2-S1, 22.4R3.

References

• https://nvd.nist.gov/vuln/detail/CVE-2023-36846
• https://supportportal.juniper.net/JSA72300
• http://packetstormsecurity.com/files/174397/Juniper-JunOS-SRX-EX-Remote-Code-Execution.html