Unprivileged RCE via Remote Resource URLs in Apache NiFi 1.22.0
CVE-2023-36542 Published on July 29, 2023

Apache NiFi: Potential Code Injection with Properties Referencing Remote Resources
Apache NiFi 0.0.2 through 1.22.0 include Processors and Controller Services that support HTTP URL references for retrieving drivers, which allows an authenticated and authorized user to configure a location that enables custom code execution. The resolution introduces a new Required Permission for referencing remote resources, restricting configuration of these components to privileged users. The permission prevents unprivileged users from configuring Processors and Controller Services annotated with the new Reference Remote Resources restriction. Upgrading to Apache NiFi 1.23.0 is the recommended mitigation.

Vendor Advisory NVD

Vulnerability Analysis

CVE-2023-36542 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
LOW
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH

Timeline

reported

confirmed 1 day later.

resolved 1 day later.

Weakness Type

What is a Code Injection Vulnerability?

The software constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

CVE-2023-36542 has been classified to as a Code Injection vulnerability or weakness.


Products Associated with CVE-2023-36542

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Apache NiFi
 

Affected Versions

Apache Software Foundation Apache NiFi: apache nifi:

Exploit Probability

EPSS
1.25%
Percentile
79.09%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.