Allegra getLinkText Server-Side Template Injection Remote Code Execution Vulnerability

August 22nd, 2024
ZDI-24-1165 ZDI-CAN-23609

CVE ID

CVE-2024-30372

CVSS Score

8.8 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors

Allegra

Affected Products

Allegra

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Allegra. Authentication is required to exploit this vulnerability.

The specific flaw exists within the implementation of getLinkText method. The issue results from the lack of proper validation of a user-supplied string before processing it with the template engine. An attacker can leverage this vulnerability to execute code in the context of LOCAL SERVICE.

Additional Details

Allegra has issued an update to correct this vulnerability. More details can be found at:
https://alltena.com/en/resources/release-notes/relnotes-7-5-2

Disclosure Timeline

  • 2024-04-24 - Vulnerability reported to vendor
  • 2024-08-22 - Coordinated public release of advisory
  • 2024-08-22 - Advisory Updated

Credit

Anonymous

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