Modoboa is vulnerable to an XML External Entity Injection (XXE)
Date: 2022-05
Affected: pip/modoboa-dmarc
Attack vector: dos
Category: vulnerability-disclosure
Severity: High
CVE: CVE-2019-19702
CWE: CWE-91
CVSS: 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

The modoboa-dmarc plugin 1.1.0 for Modoboa is vulnerable to an XML External Entity Injection (XXE) attack when processing XML data. A remote attacker could exploit this to perform a denial of service against the DMARC reporting functionality, such as by referencing the /dev/random file within XML documents that are emailed to the address in the rua field of the DMARC records of a domain.


Mitigations:

Architectural layers (MAESTRO):