Resource Exhaustion Affecting eap7-snakeyaml package, versions <0:1.31.0-1.redhat_00001.1.el7eap


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.08% (38th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications

Snyk Learn

Learn about Resource Exhaustion vulnerabilities in an interactive lesson.

Start learning
  • Snyk IDSNYK-RHEL7-EAP7SNAKEYAML-5308034
  • published27 Mar 2023
  • disclosed14 Jun 2022

Introduced: 14 Jun 2022

CVE-2022-2053  (opens in a new tab)
CWE-400  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade RHEL:7 eap7-snakeyaml to version 0:1.31.0-1.redhat_00001.1.el7eap or higher.
This issue was patched in RHSA-2022:6821.

NVD Description

Note: Versions mentioned in the description apply only to the upstream eap7-snakeyaml package and not the eap7-snakeyaml package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

When a POST request comes through AJP and the request exceeds the max-post-size limit (maxEntitySize), Undertow's AjpServerRequestConduit implementation closes a connection without sending any response to the client/proxy. This behavior results in that a front-end proxy marking the backend worker (application server) as an error state and not forward requests to the worker for a while. In mod_cluster, this continues until the next STATUS request (10 seconds intervals) from the application server updates the server state. So, in the worst case, it can result in "All workers are in error state" and mod_cluster responds "503 Service Unavailable" for a while (up to 10 seconds). In mod_proxy_balancer, it does not forward requests to the worker until the "retry" timeout passes. However, luckily, mod_proxy_balancer has "forcerecovery" setting (On by default; this parameter can force the immediate recovery of all workers without considering the retry parameter of the workers if all workers of a balancer are in error state.). So, unlike mod_cluster, mod_proxy_balancer does not result in responding "503 Service Unavailable". An attacker could use this behavior to send a malicious request and trigger server errors, resulting in DoS (denial of service). This flaw was fixed in Undertow 2.2.19.Final, Undertow 2.3.0.Alpha2.

CVSS Scores

version 3.1