# CVE-2020-1956

Apache Kylin 2.3.0, and releases up to 2.6.5 and 3.0.1 has some restful apis which will concatenate os command with the user input string, a user is likely to be able to execute any os command without any protection or validation.

- Page: https://www.vulneraibility.com/cve/CVE-2020-1956
- CVSS: 8.8
- Known exploited: yes, in CISA KEV since 2022-03-25; CISA due date 2022-04-15
- EPSS: 98.00% (percentile 99.9)
- Unvetted proof-of-concept code on GitHub: 1 GitHub proof of concept · 1 Nuclei template (first 2021-07-08)
- CISA SSVC: exploitation active, automatable no, technical impact total (assessed 2025-02-06)
- Weakness: CWE-78
- Published: 2020-05-22

## Affected versions

- Apache Kylin: affected 2.3.0; <= 2.6.5; <= 3.0.1

A version outside these ranges is not a statement that it is unaffected.

## References

- [other] https://lists.apache.org/thread.html/r1332ef34cf8e2c0589cf44ad269fb1fb4c06addec6297f0320f5111d%40%3Cuser.kylin.apache.org%3E
- [other] https://community.sonarsource.com/t/apache-kylin-3-0-1-command-injection-vulnerability/25706
- [other] https://lists.apache.org/thread.html/r250a867961cfd6e0506240a9c7eaee782d84c6ab0091c7c4bc45f3eb%40%3Cuser.kylin.apache.org%3E
- [other] https://lists.apache.org/thread.html/r250a867961cfd6e0506240a9c7eaee782d84c6ab0091c7c4bc45f3eb%40%3Cdev.kylin.apache.org%3E
- [other] https://lists.apache.org/thread.html/r61666760d8a4e8764b2d5fe158d8a48b569414480fbfadede574cdc0%40%3Ccommits.kylin.apache.org%3E
- [other] https://lists.apache.org/thread.html/r250a867961cfd6e0506240a9c7eaee782d84c6ab0091c7c4bc45f3eb%40%3Cannounce.apache.org%3E
- [other] http://www.openwall.com/lists/oss-security/2020/07/14/1
- [other] https://lists.apache.org/thread.html/r021baf9d8d4ae41e8c8332c167c4fa96c91b5086563d9be55d2d7acf%40%3Ccommits.kylin.apache.org%3E
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1956

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.