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CVE-2020-12272

OpenDMARC through 1.3.2 and 1.4.x allows attacks that inject authentication results to provide...

5.3 MediumFix available

OpenDMARC through 1.3.2 and 1.4.x allows attacks that inject authentication results to provide false information about the domain that originated an e-mail message. This is caused by incorrect parsing and interpretation of SPF/DKIM authentication results, as demonstrated by the example.net(.example.com substring.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
Low
Availability
None

Exploit likelihood

2.12%Up 1.5 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 5.3

OpenDMARC through 1.3.2 and 1.4.x allows attacks that inject authentication results to provide false information about the domain that originated an e-mail message. This is caused by incorrect parsing and interpretation of SPF/DKIM authentication results, as demonstrated by the example.net(.example.com substring.

Record
CVE-2020-12272
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:P/A:N
Weakness
CWE-290
Updated
2026-11-02
CVE List No score

OpenDMARC through 1.3.2 and 1.4.x allows attacks that inject authentication results to provide false information about the domain that originated an e-mail message. This is caused by incorrect parsing and interpretation of SPF/DKIM authentication results, as demonstrated by the example.net(.example.com substring.

Record
CVE-2020-12272
Updated
2026-11-02
EUVDEUVD-2020-4585 No score

OpenDMARC through 1.3.2 and 1.4.x allows attacks that inject authentication results to provide false information about the domain that originated an e-mail message. This is caused by incorrect parsing and interpretation of SPF/DKIM authentication results, as demonstrated by the example.net(.example.com substring.

Record
EUVD-2020-4585
Updated
2026-11-03
GitHub AdvisoriesGHSA-m64q-99pc-qh99 5.3

OpenDMARC through 1.3.2 and 1.4.x allows attacks that inject authentication results to provide...

OpenDMARC through 1.3.2 and 1.4.x allows attacks that inject authentication results to provide false information about the domain that originated an e-mail message. This is caused by incorrect parsing and interpretation of SPF/DKIM authentication results, as demonstrated by the example.net(.example.com substring.

Record
GHSA-m64q-99pc-qh99
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness
CWE-290
Updated
2026-11-02
OSV 5.3

OpenDMARC through 1.3.2 and 1.4.x allows attacks that inject authentication results to provide false information about the domain that originated an e-mail message. This is caused by incorrect parsing and interpretation of SPF/DKIM authentication results, as demonstrated by the example.net(.example.com substring.

Record
CVE-2020-12272
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Updated
2026-11-02
OSVDEBIAN-CVE-2020-12272 5.3

OpenDMARC through 1.3.2 and 1.4.x allows attacks that inject authentication results to provide false information about the domain that originated an e-mail message. This is caused by incorrect parsing and interpretation of SPF/DKIM authentication results, as demonstrated by the example.net(.example.com substring.

Record
DEBIAN-CVE-2020-12272
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Updated
2026-11-02
Show 4 moreShow less
OSVUBUNTU-CVE-2020-12272 5.3

OpenDMARC through 1.3.2 and 1.4.x allows attacks that inject authentication results to provide false information about the domain that originated an e-mail message. This is caused by incorrect parsing and interpretation of SPF/DKIM authentication results, as demonstrated by the example.net(.example.com substring.

Record
UBUNTU-CVE-2020-12272
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Updated
2026-11-02
OSVMGASA-2021-0462 No score

Updated opendmarc packages fix security vulnerability

OpenDMARC through 1.3.2 and 1.4.x, when used with pypolicyd-spf 2.0.2, allows attacks that bypass SPF and DMARC authentication in situations where the HELO field is inconsistent with the MAIL FROM field (CVE-2019-20790).

OpenDMARC through 1.3.2 and 1.4.x allows attacks that inject authentication results to provide false information about the domain that originated an e-mail message. This is caused by incorrect parsing and interpretation of SPF/DKIM authentication results, as demonstrated by the example.net(.example.com substring (CVE-2020-12272).

OpenDMARC through 1.3.2 and 1.4.x through 1.4.0-Beta1 has improper null termination in the function opendmarc_xml_parse that can result in a one-byte heap overflow in opendmarc_xml when parsing a specially crafted DMARC aggregate report. This can cause remote memory corruption when a '\0' byte overwrites the heap metadata of the next chunk and its PREV_INUSE flag (CVE-2020-12460).

Record
MGASA-2021-0462
Updated
2026-11-02
OSVopenSUSE-SU-2024:11576-1 No score

autobuild-2.11.0-6.1 on GA media

These are all security issues fixed in the autobuild-2.11.0-6.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:11576-1
Updated
2026-11-02
OSVUSN-6356-1 No score

opendmarc vulnerabilities

Jianjun Chen, Vern Paxson and Jian Jiang discovered that OpenDMARC incorrectly handled certain inputs. If a user or an automated system were tricked into receiving crafted inputs, an attacker could possibly use this to falsify the domain of an e-mails origin. (CVE-2020-12272)

Patrik Lantz discovered that OpenDMARC incorrectly handled certain inputs. If a user or an automated system were tricked into opening a specially crafted input file, a remote attacker could possibly use this issue to cause a denial of service. (CVE-2020-12460)

Record
USN-6356-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
opendmarc
Debian:12
before 1.4.0~beta1+dfsg-4
1.4.0~beta1+dfsg-4
opendmarc
Debian:13
before 1.4.0~beta1+dfsg-4
1.4.0~beta1+dfsg-4
opendmarc
Debian:14
before 1.4.0~beta1+dfsg-4
1.4.0~beta1+dfsg-4
opendmarc
Debian:10
before 1.3.2-6+deb10u3, plus listed versions
1.3.2-61.3.2-6+deb10u11.3.2-6+deb10u2
1.3.2-6+deb10u3
opendmarc
Mageia:8
From an advisory covering 3 CVEs
before 1.4.1.1-1.mga8
1.4.1.1-1.mga8
opendmarc
Ubuntu:Pro:16.04:LTS
before 1.3.1+dfsg-3ubuntu0.1~esm1, plus listed versions
1.3.1+dfsg-21.3.1+dfsg-3
1.3.1+dfsg-3ubuntu0.1~esm1
opendmarc
Ubuntu:18.04:LTS
before 1.3.2-3ubuntu0.2, plus listed versions
1.3.2-21.3.2-31.3.2-3ubuntu0.1
1.3.2-3ubuntu0.2
opendmarc
Ubuntu:20.04:LTS
before 1.3.2-7ubuntu0.1, plus listed versions
1.3.2-61.3.2-7
1.3.2-7ubuntu0.1
opendmarc
Ubuntu:Pro:16.04:LTS
From an advisory covering 2 CVEs
before 1.3.1+dfsg-3ubuntu0.1~esm1, plus listed versions
1.3.1+dfsg-21.3.1+dfsg-3
1.3.1+dfsg-3ubuntu0.1~esm1
opendmarc
Ubuntu:18.04:LTS
From an advisory covering 2 CVEs
before 1.3.2-3ubuntu0.2, plus listed versions
1.3.2-21.3.2-31.3.2-3ubuntu0.1
1.3.2-3ubuntu0.2
opendmarc
Ubuntu:20.04:LTS
From an advisory covering 2 CVEs
before 1.3.2-7ubuntu0.1, plus listed versions
1.3.2-61.3.2-7
1.3.2-7ubuntu0.1

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-12272 is a medium vulnerability (CVSS 5.3) in Trusteddomain Opendmarc, published April 27, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.12%, the 81st percentile. Fixed in opendmarc 1.4.0~beta1+dfsg-4.

References

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