7.5

CVE-2020-28019: exim Improper Initialization

CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2020-28019DEBIAN-CVE-2020-28019
Published 06-05-2021Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-28019 is a high (CVSS 7.5) Improper Initialization vulnerability in exim. EPSS estimates a 61.66% chance of exploitation in the next 30 days, higher than 99.1% of scored vulnerabilities.

Overall risk
42/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
61.66%
0%100%
Critical · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 7 · Related 5
DLA-2650-1DSA-4912-1OPENSUSE-SU-2021:0677-1OPENSUSE-SU-2021:0753-1OPENSUSE-SU-2021:0754-1OPENSUSE-SU-2024:10746-1

Timeline

  1. 06-05-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

61.66%

Chance of exploitation in the next 30 days

Percentile

99%

Versus all other CVEs

30-day change

0.00 pp

From 61.66% on 19-09-2026

19-09-202619-10-2026
EPSS score
61.66%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • exim4< 4.94.2-1
Exim1 product
  • exim≥ 4.88, < 4.94.2
Ubuntu1 product
  • exim4< 4.90.1-1ubuntu1.8 | < 4.93-13ubuntu1.5

3 vendors · 3 products

References

5 links