CVE-2020-28024

Description

Exim 4 before 4.94.2 allows Buffer Underwrite that may result in unauthenticated remote attackers executing arbitrary commands, because smtp_ungetc was only intended to push back characters, but can actually push back non-character error codes such as EOF.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 1.23% Top 25%
Third-Party Advisory exim.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28024-UNGET.txt third party advisory

Frequently Asked Questions

What is the severity of CVE-2020-28024?
CVE-2020-28024 has been scored as a critical severity vulnerability.
How to fix CVE-2020-28024?
To fix CVE-2020-28024, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-28024 being actively exploited in the wild?
It is possible that CVE-2020-28024 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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