Published: 06/05/2021 Updated: 10/05/2021

CVSS v2 Base Score: 9 | Impact Score: 10 | Exploitability Score: 8

CVSS v3 Base Score: 8.8 | Impact Score: 5.9 | Exploitability Score: 2.8

VMScore: 801

Vector: AV:N/AC:L/Au:S/C:C/I:C/A:C

Exim 4 prior to 4.94.2 has Improper Neutralization of Line Delimiters. An authenticated remote SMTP client can insert newline characters into a spool file (which indirectly leads to remote code execution as root) via AUTH= in a MAIL FROM command.

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exim exim

The Qualys Research Labs reported several vulnerabilities in Exim, a mail transport agent, which could result in local privilege escalation and remote code execution Details can be found in the Qualys advisory at wwwqualyscom/2021/05/04/21nails/21nailstxt For the stable distribution (buster), these problems have been fixed in version 4 ...

Prior versions of Exim 4 have Improper Neutralization of Line Delimiters Local users can alter the behavior of root processes because a recipient address can have a newline character (<a href="nvdnistgov/vuln/detail/CVE%2D2020-28015">CVE-2020-28015</a>) Prior versions of Exim 4 allowed Integer Overflow to Buffer Overflow in ...

A security issue has been found in Exim before version 4942 that allows for new-line injection into spool header files (remote) ...

NVD-CWE-Other https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28021-MAUTH.txt https://nvd.nist.gov https://www.debian.org/security/2021/dsa-4912

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CVE-2020-28021

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