// For flags

CVE-2020-26238

Critical vulnerability found in cron-utils

Severity Score

8.1
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

2
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

Cron-utils is a Java library to parse, validate, migrate crons as well as get human readable descriptions for them. In cron-utils before version 9.1.3, a template Injection vulnerability is present. This enables attackers to inject arbitrary Java EL expressions, leading to unauthenticated Remote Code Execution (RCE) vulnerability. Only projects using the @Cron annotation to validate untrusted Cron expressions are affected. This issue was patched in version 9.1.3.

Cron-utils es una biblioteca de Java para analizar, comprobar, migrar crons y obtener descripciones legibles por humanos para ellos. En cron-utils versiones anteriores a 9.1.3, se presenta una vulnerabilidad de inyección de plantilla. Esto permite a atacantes inyectar expresiones EL de Java arbitrarias, conllevando a una vulnerabilidad de Ejecución de Código Remota (RCE) no autenticada. Solo están afectados los proyectos que usan la anotación @Cron para comprobar expresiones Cron que no son confiables. Este problema se corrigió en la versión 9.1.3

A flaw was found in cron-utils. End applications passing unsanitized user input which is subsequently parsed by the `@Cron` annotation can allow an attacker to execute arbitrary expressions using JavaEL which will be implicitly executed by the constraint validator. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

This release of Red Hat Integration - Camel Quarkus - 1.8.1 tech-preview 2 serves as a replacement for tech-preview 1, and includes bug fixes and enhancements, which are documented in the Release Notes document linked to in the References. Issues addressed include code execution, denial of service, information leakage, man-in-the-middle, and traversal vulnerabilities.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2020-10-01 CVE Reserved
  • 2020-11-24 CVE Published
  • 2024-08-04 CVE Updated
  • 2024-08-04 First Exploit
  • 2024-12-17 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
  • CWE-94: Improper Control of Generation of Code ('Code Injection')
CAPEC
References (15)
URL Tag Source
https://lists.apache.org/thread.html/r390bb7630b7ea8f02bf7adbbe69c0ae8b562c527d663c543d965f959%40%3Cgitbox.hive.apache.org%3E Mailing List
https://lists.apache.org/thread.html/r432a69a1a85cbcb1f1bad2aa0fbfce0367bf894bf917f6ed7118e7f0%40%3Cissues.hive.apache.org%3E Mailing List
https://lists.apache.org/thread.html/r50e1b5544c37e408ed7e9a958b28237b1cb9660ba2b3dba46f343e23%40%3Cissues.hive.apache.org%3E Mailing List
https://lists.apache.org/thread.html/r5f601d15292e3302ad0ae0e89527029546945b1cd5837af7e838d354%40%3Cdev.hive.apache.org%3E Mailing List
https://lists.apache.org/thread.html/r71083c759dc627f198571b3d48b6745fe798b1d53c34f7ef8de9e7dd%40%3Cissues.hive.apache.org%3E Mailing List
https://lists.apache.org/thread.html/r737406bc17d49ffe8fe6a8828d390ee0a02e45e5a5b4f931180b9a93%40%3Cissues.hive.apache.org%3E Mailing List
https://lists.apache.org/thread.html/r855aead591697dc2e85faf66c99036e49f492431940b78d4e6d895b5%40%3Cgitbox.hive.apache.org%3E Mailing List
https://lists.apache.org/thread.html/r96937fc9c82f3201b59311c067e97bce71123944f93102169a95bf5c%40%3Cissues.hive.apache.org%3E Mailing List
https://lists.apache.org/thread.html/r9ae9a9fb1c8e2bf95c676e7e4cd06aa04f0a3a8a9ec1a6b787afb00f%40%3Cissues.hive.apache.org%3E Mailing List
https://lists.apache.org/thread.html/ra9e81244d323898dde3c979dd7df6996e4037d14a01b6629ea443548%40%3Cissues.hive.apache.org%3E Mailing List
URL Date SRC
https://github.com/jmrozanec/cron-utils/issues/461 2024-08-04
https://github.com/jmrozanec/cron-utils/security/advisories/GHSA-pfj3-56hm-jwq5 2024-08-04
URL Date SRC
https://github.com/jmrozanec/cron-utils/commit/4cf373f7352f5d95f0bf6512af8af326b31c835e 2023-11-07
URL Date SRC
https://access.redhat.com/security/cve/CVE-2020-26238 2021-08-18
https://bugzilla.redhat.com/show_bug.cgi?id=1901655 2021-08-18
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Cron-utils Project
Search vendor "Cron-utils Project"
 Cron-utils
Search vendor "Cron-utils Project" for product "Cron-utils"
 < 9.1.3
Search vendor "Cron-utils Project" for product "Cron-utils" and version " < 9.1.3"
-
Affected