CVE-2021-41269

Public Exploit
Unauthenticated remote code injection in cron-utils

Description

cron-utils is a Java library to define, parse, validate, migrate crons as well as get human readable descriptions for them. In affected versions A template Injection was identified in cron-utils enabling attackers to inject arbitrary Java EL expressions, leading to unauthenticated Remote Code Execution (RCE) vulnerability. Versions up to 9.1.2 are susceptible to this vulnerability. Please note, that only projects using the @Cron annotation to validate untrusted Cron expressions are affected. The issue was patched and a new version was released. Please upgrade to version 9.1.6. There are no known workarounds known.

Category

10.0
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 3.42% Top 15%
Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com
Affected: jmrozanec cron-utils
Published at:
Updated at:

References

Link Tags
https://github.com/jmrozanec/cron-utils/issues/461 third party advisory issue tracking exploit
https://github.com/jmrozanec/cron-utils/security/advisories/GHSA-p9m8-27x8-rg87 third party advisory
https://github.com/jmrozanec/cron-utils/commit/cfd2880f80e62ea74b92fa83474c2aabdb9899da third party advisory patch
https://github.com/jmrozanec/cron-utils/commit/d6707503ec2f20947f79e38f861dba93b39df9da third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-41269?
CVE-2021-41269 has been scored as a critical severity vulnerability.
How to fix CVE-2021-41269?
To fix CVE-2021-41269, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-41269 being actively exploited in the wild?
It is possible that CVE-2021-41269 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~3% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-41269?
CVE-2021-41269 affects jmrozanec cron-utils.
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