Template injection in cron-utils - CVE-2021-41269
Published: October 6, 2022
Vulnerability identifier: #VU67975
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2021-41269
CWE-ID: CWE-94
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: jmrozanec
Affected software:
cron-utils
cron-utils
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to improper input validation when validating untrusted Cron expressions in @Cron annotation. A remote attacker can send a specially crafted request to the application and execute arbitrary Java code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
How to mitigate CVE-2021-41269
Install updates from vendor's website.
Sources
- https://github.com/jmrozanec/cron-utils/issues/461
- https://github.com/jmrozanec/cron-utils/commit/d6707503ec2f20947f79e38f861dba93b39df9da
- https://github.com/jmrozanec/cron-utils/security/advisories/GHSA-p9m8-27x8-rg87
- https://github.com/jmrozanec/cron-utils/commit/cfd2880f80e62ea74b92fa83474c2aabdb9899da