CVE-2020-28026

moderate-risk
Published 2021-05-06

Exim 4 before 4.94.2 has Improper Neutralization of Line Delimiters, relevant in non-default configurations that enable Delivery Status Notification (DSN). Certain uses of ORCPT= can place a newline into a spool header file, and indirectly allow unauthenticated remote attackers to execute arbitrary commands as root.

Do I need to act?

~
4.3% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
+
Fix available
Upgrade to: 919111edac911ba9c15422eafd7c5bf14d416d26
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Exim

References (2)

Third Party Advisory https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28026-FGETS.tx...
Third Party Advisory https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28026-FGETS.tx...
44
/ 100
moderate-risk
Severity 32/34 · Critical
Exploitability 7/34 · Low
Exposure 5/34 · Minimal