PT-2021-4268 · Opendmarc+1 · Opendmarc+1

Glts · Published 2021-06-10 · Updated 2022-05-29 · CVE-2021-34555

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions OpenDMARC versions 1.4.1 through 1.4.1.1

Description The issue is related to a denial of service caused by a NULL pointer dereference and application crash. This can be triggered by remote attackers via a multi-value From header field. The vulnerability is associated with errors in pointer dereferencing, allowing a remote attacker to cause a denial of service.

Recommendations For OpenDMARC versions 1.4.1 through 1.4.1.1, consider disabling the handling of multi-value From header fields as a temporary workaround until a patch is available. Restrict access to the application to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

DoS

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

ALT-PU-2022-1957

BDU:2021-04876

CVE-2021-34555

Affected Products

Alt Linux

Opendmarc

References · 10

• 🔥 https://github.com/trusteddomainproject/OpenDMARC/issues/179 · Exploit
• https://github.com/trusteddomainproject/OpenDMARC/pull/178 · Patch
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2MAT4ZSWPQ5SUTMYCXRXI5SMTWL4AG7E · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-04876 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-34555 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-34555 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-34555 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VZHZD4WZDYRBB2XVW2EQ4DQ2KYMAGPUO · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-34555 · Vendor Advisory
• https://t.me/cvenotify/17902 · Telegram Post