CVE-2023-36846

Summary

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 to user.php 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;
• 21.1 versions 21.1R1 and later;
• 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.

Affected Software

Weaknesses

• CWE-306: CWE-306 Missing Authentication for Critical Function

Workarounds

Disable J-Web, or limit access to only trusted hosts.

ADP Enrichment

CVE Program Container

Additional References

• https://supportportal.juniper.net/JSA72300

CISA ADP Vulnrichment

• SSVC:
• Exploitation: active
  • Automatable: yes
  • Technical Impact: total

Additional References

• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-36846

References

• https://supportportal.juniper.net/JSA72300

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