Authentication bypass in OpenDMARC
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2019-20790 |
| CWE-ID | CWE-290 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
OpenDMARC Universal components / Libraries / Libraries used by multiple products |
| Vendor | Trusted Domain Project |
Security Bulletin
This security bulletin contains information about 1 vulnerabilities.
Updated: 30.04.2021
Added fixed version and changed bulletin status to patched.
1) Authentication Bypass by Spoofing
EUVDB-ID: #VU52767
Risk: Medium
CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2019-20790
CWE-ID:
CWE-290 - Authentication Bypass by Spoofing
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists in OpenDMARC when used with pypolicyd-spf 2.0.2 when processing headers added by previous SPF filters. A remote attacker can bypass SPF and DMARC authentication in situations where the HELO field is inconsistent with the MAIL FROM field.
Install updates from vendor's website.
Vulnerable software versionsOpenDMARC: 1.3.2 - 1.4.0
External linkshttp://bugs.launchpad.net/pypolicyd-spf/+bug/1838816
http://sourceforge.net/p/opendmarc/tickets/235/
http://www.usenix.org/system/files/sec20fall_chen-jianjun_prepub_0.pdf
http://github.com/trusteddomainproject/OpenDMARC/releases/tag/rel-opendmarc-1-4-1
http://github.com/trusteddomainproject/OpenDMARC/blob/master/SECURITY/CVE-2019-20790
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
