A critical vulnerability was found in the OpenDMARC open-source implementation of the DMARC specification. It was discovered that OpenDMARC through 1.3.2 and 1.4.x through 1.4.0-Beta1 incorrectly handled certain inputs, resulting in remote memory corruption in certain situations ( CVE-2020-12460 ). This vulnerability has received a National Vulnerability Database base score of 9.8 out of 10 (“Critical” severity). . A remote attacker could possibly use this issue to cause a denial of service. Essential OpenDMARC updates have been released to mitigate this severe bug. We urge all impacted users to apply the updates released by ArchLinux , Debian LTS , Fedora , Gentoo , Mageia , and Ubuntu immediately to prevent loss of access to their critical systems. To stay on top of essential updates released by the open-source programs and applications you use, register as a LinuxSecurity user , subscribe to our Linux Advisory Watch newsletter, and customize your advisories for your distro(s). This will enable you to stay up-to-date on the latest, most significant issues impacting the security of your systems. Follow @LS_Advisories on Twitter for real-time updates on advisories for your distro(s) . . An external threat actor could leverage this significant OpenDMARC vulnerability to initiate a denial of service attack. It's essential to apply updates immediately.. OpenDMARC Update,Critical Security Issue,Denial Of Service Exploit. . Brittany Day
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