Template injection in cron-utils



| Updated: 2022-10-06
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-41269
CWE-ID CWE-94
Exploitation vector Network
Public exploit N/A
Vulnerable software
 cron-utils
Web applications / JS libraries

Vendor jmrozanec

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Template injection

EUVDB-ID: #VU67975

Risk: High

CVSSv4.0: 8.1 [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 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: No

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

cron-utils: 1.0.0 - 9.1.5

CPE2.3 External links

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


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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