CVE-2023-42117 — Improper Neutralization of Special Elements in Exim

CWE-138 — Improper Neutralization of Special ElementsCWE-77 — Command Injection12 documents9 sources
Severity
9.8CRITICALNVD
EPSS
7.3%
top 8.27%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Exim
Timeline
PublishedMay 3

Description

Exim Improper Neutralization of Special Elements Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Exim. Authentication is not required to exploit this vulnerability. The specific flaw exists within the smtp service, which listens on TCP port 25 by default. The issue results from the lack of proper validation of user-supplied data, which can result in a memory corruption condition. An attacker can leverage this…

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages2 packages

▶NVDexim/exim< 4.96.2
▶CVEListV5exim/exim4.96-RC1-11-315206fbf

🔴Vulnerability Details

4
CVEList
Exim Improper Neutralization of Special Elements Remote Code Execution Vulnerability↗2024-05-03
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GHSA
GHSA-qf54-2qx8-3vcv: Exim Improper Neutralization of Special Elements Remote Code Execution Vulnerability↗2024-05-03
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OSV
CVE-2023-42117: Exim Improper Neutralization of Special Elements Remote Code Execution Vulnerability↗2024-05-03
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OSV
exim4 vulnerabilities↗2023-10-26
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📋Vendor Advisories

3
Ubuntu
Exim vulnerabilities↗2023-10-26
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Red Hat
Exim: Improper Neutralization of Special Elements Remote Code Execution Vulnerability↗2023-09-27
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Debian
CVE-2023-42117: exim4 - Exim Improper Neutralization of Special Elements Remote Code Execution Vulnerabi...↗2023
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🕵️Threat Intelligence

4
Wiz
Exim 0day Vulnerabilities: Everything You Need to Know | Wiz Blog↗2023-10-02
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Wiz
Exim 0day Vulnerabilities: Everything You Need to Know | Wiz Blog↗2023-10-02
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Bleepingcomputer
Exim patches three of six zero-day bugs disclosed last week↗2023-10-02
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Bleepingcomputer
Millions of Exim mail servers exposed to zero-day RCE attacks↗2023-09-29
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