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debiancveDebian Security Bug TrackerDEBIANCVE:CVE-2023-42116
HistoryMay 03, 2024 - 3:15 a.m.

CVE-2023-42116

2024-05-0303:15:50
Debian Security Bug Tracker
security-tracker.debian.org
21
exim
smtp
buffer overflow
rce
cve-2023-42116
vulnerability
remote code execution
ntlm
stack-based buffer
authentication
zdi-can-17515
unix

CVSS3

8.1

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

AI Score

8.3

Confidence

High

EPSS

0.001

Percentile

28.8%

Exim SMTP Challenge Stack-based Buffer Overflow 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 handling of NTLM challenge requests. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the service account. Was ZDI-CAN-17515.

CVSS3

8.1

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

AI Score

8.3

Confidence

High

EPSS

0.001

Percentile

28.8%