Paper/Archive/CVE-2021-41269

CVE-2021-41269

jmrozanec cron-utils — Unauthenticated remote code injection in cron-utils

CVSS 10.0 (CNA)10.0 / 10 × 3030.0 Not in CISA KEV+300.0 EPSS percentile 91.2.912 × 2018.2 No public exploit+100.0 SSVC exploitation: unknown+100.0

Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource

cron-utils< 9.1.6–CNA

Scores by source

GitHub_M (CNA)10.0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

refgithub.com/jmrozanec/cron-utils/issues/461 refgithub.com/jmrozanec/cron-utils/security/advisories/GHSA-p9m8-27x8-rg87 refgithub.com/jmrozanec/cron-utils/commit/cfd2880f80e62ea74b92fa83474c2aabdb9899da refgithub.com/jmrozanec/cron-utils/commit/d6707503ec2f20947f79e38f861dba93b39df9da