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| Rule General Information |
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| Release Date: | 2021-05-04 | |
| Rule Name: | Exim Spool Header File Injection Vulnerability (CVE-2020-28021) | |
| Severity: | ||
| CVE ID: | ||
| Rule Protection Details |
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| Description: | Exim 4 before 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. | |
| Impact: | An attacker can abtain more privileges which he is not entitled to by exloiting the vulnerability, such as executing arbitrary code, deleting files, viewing sensitive information, changing configurations. | |
| Affected OS: | Linux, Others | |
| Reference: | https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28021-MAUTH.txt |
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| Solutions |
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| The vendors have released upgrade patches to fix vulnerabilities, please visit: https://ubuntu.com/security/notices/USN-4934-1?_ga=2.264440204.2023876064.1620270652-2089915127.1616724149 |