Critical Vulnerabilities 21Nails In Exim Mail Transfer Agent Expose Millions Of Servers To Attacks

Qualys Research Team has reported a group of security flaws in the Exim mail transfer agent (MTA) software that allow unauthenticated remote attackers to execute arbitrary code and gain root privilege on mail servers with default or common configurations.

The vulnerabilities are tracked as 21Nails.

All versions of Exim before 4.94.2 are vulnerable to the attacks abusing 21Nails.

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