CVE-2020-28021 — Exim vulnerability

10 documents8 sources
Severity
8.8HIGHNVD
EPSS
6.5%
top 8.89%
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 Neutralization of Line Delimiters. An authenticated remote SMTP client can insert newline characters into a spool file (which indirectly leads to remote code execution as root) via AUTH= in a MAIL FROM command.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 2.8 | Impact: 5.9

Affected Packages1 packages

▶NVDexim/exim4.00 — 4.94.2

🔴Vulnerability Details

3
GHSA
GHSA-mrwv-vp3r-qhjm: Exim 4 before 4↗2022-05-24
▶
CVEList
CVE-2020-28021: Exim 4 before 4↗2021-05-06
▶
OSV
CVE-2020-28021: Exim 4 before 4↗2021-05-06
▶

🔍Detection Rules

3
Suricata
ET EXPLOIT Exim New-Line Injection into Spool Header File Inbound M2 (CVE-2020-28021)↗2021-05-04
▶
Suricata
ET EXPLOIT Exim New-Line Injection into Spool Header File Inbound M1 (CVE-2020-28021)↗2021-05-04
▶
Suricata
ET EXPLOIT Exim New-Line Injection into Spool Header File Inbound - Information Disclosure Attempt (CVE-2020-28021)↗2021-05-04
▶

📋Vendor Advisories

2
Ubuntu
Exim vulnerabilities↗2021-05-04
▶
Debian
CVE-2020-28021: exim4 - Exim 4 before 4.94.2 has Improper Neutralization of Line Delimiters. An authenti...↗2020
▶

🕵️Threat Intelligence

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