Improper Neutralization of Line Delimiters in Exim Mail Transfer Agent
CVE-2020-28021

8.8HIGH

Key Information:

Vendor

Exim

Status
Exim
Vendor
CVE Published:
6 May 2021

What is CVE-2020-28021?

Exim Mail Transfer Agent versions prior to 4.94.2 exhibit a flaw due to improper neutralization of line delimiters. This vulnerability allows an authenticated remote SMTP client to manipulate spool files by injecting newline characters through the AUTH= command in a MAIL FROM context. Exploitation of this issue can lead to the potential execution of arbitrary commands with root privileges, posing a significant security threat to systems using affected versions.

References

https://www.exim.org/static/doc/security/CVE-2020-qualys/...
x_refsource_MISC

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.