Vulnerabilities > CVE-2020-28021 - Unspecified vulnerability in Exim

CVSS 8.8 - HIGH

Attack vector

NETWORK

Attack complexity

LOW

Privileges required

LOW

Confidentiality impact

HIGH

Integrity impact

HIGH

Availability impact

HIGH

network

low complexity

exim

NVD

Published: 2021-05-06

Updated: 2021-05-10

Summary

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.

Vulnerable Configurations

Part	Description	Count
Application	Exim Exim Exim 4.00 Exim Exim 4.01 Exim Exim 4.02 Exim Exim 4.03 Exim Exim 4.04 Exim Exim 4.05 Exim Exim 4.10 Exim Exim 4.11 Exim Exim 4.12 Exim Exim 4.14 Exim Exim 4.20 Exim Exim 4.21 Exim Exim 4.22 Exim Exim 4.23 Exim Exim 4.24 Exim Exim 4.30 Exim Exim 4.31 Exim Exim 4.32 Exim Exim 4.33 Exim Exim 4.34 Exim Exim 4.40 Exim Exim 4.41 Exim Exim 4.42 Exim Exim 4.43 Exim Exim 4.44 Exim Exim 4.50 Exim Exim 4.51 Exim Exim 4.52 Exim Exim 4.53 Exim Exim 4.54 Exim Exim 4.60 Exim Exim 4.61 Exim Exim 4.62 Exim Exim 4.63 Exim Exim 4.64 Exim Exim 4.65 Exim Exim 4.66 Exim Exim 4.67 Exim Exim 4.68 Exim Exim 4.69 Exim Exim 4.70 Exim Exim 4.71 Exim Exim 4.72 Exim Exim 4.73 Exim Exim 4.74 Exim Exim 4.75 Exim Exim 4.76 Exim Exim 4.77 Exim Exim 4.80 Exim Exim 4.80.1 Exim Exim 4.82 Exim Exim 4.82.1 Exim Exim 4.84.2 Exim Exim 4.85 Exim Exim 4.85.1 Exim Exim 4.85.2 Exim Exim 4.86 Exim Exim 4.86.1 Exim Exim 4.86.2 Exim Exim 4.87 Exim Exim 4.87.1 Exim Exim 4.88 Exim Exim 4.89 Exim Exim 4.89.1 Exim Exim 4.90 Exim Exim 4.90.0.22 Exim Exim 4.90.0.27 Exim Exim 4.90.1 Exim Exim 4.91 Exim Exim 4.92 Exim Exim 4.92.1 Exim Exim 4.92.2 Exim Exim 4.93 Exim Exim 4.93.0.4 Exim Exim 4.93.0.4-3.1 Exim Exim 4.94 Exim Exim 4.94.1	122

References

https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28021-MAUTH.txt