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Red Hat Security Advisory 2022-9058-01

Red Hat Security Advisory 2022-9058-01 - Prometheus JMX Exporter is a JMX to Prometheus exporter: a collector that can be configured to scrape and expose MBeans of a JMX target. Issues addressed include code execution and deserialization vulnerabilities.

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====================================================================
Red Hat Security Advisory

Synopsis: Important: prometheus-jmx-exporter security update
Advisory ID: RHSA-2022:9058-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:9058
Issue date: 2022-12-15
CVE Names: CVE-2022-1471
====================================================================

  1. Summary:

An update for prometheus-jmx-exporter is now available for Red Hat
Enterprise Linux 8.

Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.

  1. Relevant releases/architectures:

Red Hat Enterprise Linux AppStream (v. 8) - noarch

  1. Description:

Prometheus JMX Exporter is a JMX to Prometheus exporter: a collector that
can be configured to scrape and expose MBeans of a JMX target.

Security Fix(es):

  • SnakeYaml: Constructor Deserialization Remote Code Execution
    (CVE-2022-1471)

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.

  1. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

  1. Bugs fixed (https://bugzilla.redhat.com/):

2150009 - CVE-2022-1471 SnakeYaml: Constructor Deserialization Remote Code Execution

  1. Package List:

Red Hat Enterprise Linux AppStream (v. 8):

Source:
prometheus-jmx-exporter-0.12.0-9.el8_7.src.rpm

noarch:
prometheus-jmx-exporter-0.12.0-9.el8_7.noarch.rpm
prometheus-jmx-exporter-openjdk11-0.12.0-9.el8_7.noarch.rpm
prometheus-jmx-exporter-openjdk17-0.12.0-9.el8_7.noarch.rpm
prometheus-jmx-exporter-openjdk8-0.12.0-9.el8_7.noarch.rpm

These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

  1. References:

https://access.redhat.com/security/cve/CVE-2022-1471
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/security/cve/CVE-2022-1471

  1. Contact:

The Red Hat security contact is [email protected]. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2022 Red Hat, Inc.
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GHSA-mjmj-j48q-9wg2: SnakeYaml Constructor Deserialization Remote Code Execution

### Summary SnakeYaml's `Constructor` class, which inherits from `SafeConstructor`, allows any type be deserialized given the following line: new Yaml(new Constructor(TestDataClass.class)).load(yamlContent); Types do not have to match the types of properties in the target class. A `ConstructorException` is thrown, but only after a malicious payload is deserialized. ### Severity High, lack of type checks during deserialization allows remote code execution. ### Proof of Concept Execute `bash run.sh`. The PoC uses Constructor to deserialize a payload for RCE. RCE is demonstrated by using a payload which performs a http request to http://127.0.0.1:8000. Example output of successful run of proof of concept: ``` $ bash run.sh [+] Downloading snakeyaml if needed [+] Starting mock HTTP server on 127.0.0.1:8000 to demonstrate RCE nc: no process found [+] Compiling and running Proof of Concept, which a payload that sends a HTTP request to mock web server. [+] An exception is expected. Exc...

CVE-2022-1471: SnakeYaml: Constructor Deserialization Remote Code Execution

SnakeYaml's Constructor() class does not restrict types which can be instantiated during deserialization. Deserializing yaml content provided by an attacker can lead to remote code execution. We recommend using SnakeYaml's SafeConsturctor when parsing untrusted content to restrict deserialization.

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