CherryTree through 1.7.2 OS Command Injection via Custom Web Link Action

Summary

CherryTree through 1.7.2 contains an OS command injection vulnerability in CtActions::link_clicked that allows attackers to execute commands by embedding shell metacharacters in web link URLs. When the non-default Custom Web Link Clicked Action option is enabled, attackers can supply crafted documents whose links pass $(...), backticks, or semicolons unquoted to std::system, running commands as the victim on click.

Remediation

1. Inventory every giuspen cherrytree deployment, including staging.
2. No fixed version appears in the public sources yet. Check the references below and the vendor directly.

References

• Advisoryhttps://www.vulncheck.com/advisories/cherrytree-through-1.7.2-os-command-injection-via-custom-web-link-action
• Referencehttps://github.com/giuspen/cherrytree
• Referencehttps://github.com/giuspen/cherrytree/blob/v1.7.2/src/ct/ct_actions_others.cc#L381-L388
• Referencehttps://github.com/giuspen/cherrytree/blob/v1.7.2/src/ct/ct_misc_utils.cc#L227-L247
• Referencehttps://github.com/giuspen/cherrytree/issues/2945