CVE-2020-28019 — Improper Initialization in Exim

CWE-665 — Improper Initialization8 documents8 sources
Severity
7.5HIGHNVD
EPSS
1.8%
top 17.08%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Exim
Timeline
PublishedMay 6
Latest updateMay 24

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 vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages1 packages

▶NVDexim/exim4.88 — 4.94.2

🔴Vulnerability Details

3
GHSA
GHSA-vxgq-8r56-c922: Exim 4 before 4↗2022-05-24
▶
CVEList
CVE-2020-28019: Exim 4 before 4↗2021-05-06
▶
OSV
CVE-2020-28019: Exim 4 before 4↗2021-05-06
▶

🔍Detection Rules

1
Suricata
ET EXPLOIT Exim Stack Exhaustion via BDAT Error Inbound (CVE-2020-28019)↗2021-05-04
▶

📋Vendor Advisories

2
Ubuntu
Exim vulnerabilities↗2021-05-04
▶
Debian
CVE-2020-28019: exim4 - Exim 4 before 4.94.2 has Improper Initialization that can lead to recursion-base...↗2020
▶

🕵️Threat Intelligence

1
Qualys
21Nails: Multiple Critical Vulnerabilities in Exim Mail Server↗2021-05-04
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