CVE-2020-21523

EUVD-2020-14291 · Published Sep 30, 2020

A Server-Side Freemarker template injection vulnerability in halo CMS v1.1.3 In the Edit Theme File function. The ftl file can be edited. This is the Freemarker template file. This file can cause arbitrary code execution when it is rendered in the background. exp: <#assign test="freemarker.template.utility.Execute"?new()> ${test("touch /tmp/freemarkerPwned")}

Technologies

Halo Halo

Weaknesses

CWE-74

CVSS scores

v3.19.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
v2.010.0AV:N/AC:L/Au:N/C:C/I:C/A:C

MITRE ATT&CK

Inferred

Where this vulnerability fits in an attack

ReconImpact

Initial Access Execution Stealth Defense Impairment

T1190Exploit Public-Facing Application T1027Obfuscated Files or Information T1574.006Dynamic Linker Hijacking T1574.007Path Interception by PATH Environment Variable T1690Prevent Command History Logging

References

https://github.com/halo-dev/halo/issues/419

Potentially impacted assets

See if this affects your attack surface