What is CVE-2020-28019?

CVE-2020-28019 is a high-severity vulnerability in Exim, classified under Improper Initialization. CVSS score: 7.5/10. Published 2021-05-06.

How severe is CVE-2020-28019?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2020-28019 known to be exploited?

4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Exim

CVE-2020-28019

Exim 4 before 4.94.2 has Improper Initialization that can lead to recursion-based stack consumption or other consequences. This occurs because use of certain getc functions is mishandled when a client uses BDAT instead of DATA.

Vulnerability class: Dirty Pipe (CVE-2022-0847)

EPSS: 0.617 (99.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Exim
N/a — versions n/a

Weakness classification (CWE)

CWE-665 — Improper Initialization

Public proof-of-concept exploits

References

cve@mitre.org (x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2020-28019?: CVE-2020-28019 is a high-severity vulnerability in Exim, classified under Improper Initialization. CVSS score: 7.5/10. Published 2021-05-06.
How severe is CVE-2020-28019?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2020-28019 known to be exploited?: 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.