Exim libspf2 Integer Underflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Exim libspf2. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the parsing of SPF macros. When parsing SPF macros, the process does not properly validate user-supplied data, which can result in an integer underflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the service account.
. Was ZDI-CAN-17578.
References
Link | Resource |
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https://www.zerodayinitiative.com/advisories/ZDI-23-1472/ | Third Party Advisory |
http://www.openwall.com/lists/oss-security/2025/03/28/1 | Mailing List |
https://www.zerodayinitiative.com/advisories/ZDI-23-1472/ | Third Party Advisory |
Configurations
Configuration 1 (hide)
AND |
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History
07 Aug 2025, 18:17
Type | Values Removed | Values Added |
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References | () https://www.zerodayinitiative.com/advisories/ZDI-23-1472/ - Third Party Advisory | |
References | () http://www.openwall.com/lists/oss-security/2025/03/28/1 - Mailing List | |
CPE | cpe:2.3:a:libspf2_project:libspf2:-:*:*:*:*:*:*:* cpe:2.3:a:exim:exim:-:*:*:*:*:*:*:* |
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First Time |
Exim
Libspf2 Project libspf2 Exim exim Libspf2 Project |
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CVSS |
v2 : v3 : |
v2 : unknown
v3 : 8.8 |
28 Mar 2025, 12:15
Type | Values Removed | Values Added |
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References |
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21 Nov 2024, 08:22
Type | Values Removed | Values Added |
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References | () https://www.zerodayinitiative.com/advisories/ZDI-23-1472/ - |
18 Sep 2024, 19:15
Type | Values Removed | Values Added |
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Summary |
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Summary | (en) Exim libspf2 Integer Underflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Exim libspf2. Authentication is not required to exploit this vulnerability. The specific flaw exists within the parsing of SPF macros. When parsing SPF macros, the process does not properly validate user-supplied data, which can result in an integer underflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the service account. . Was ZDI-CAN-17578. |
03 May 2024, 03:15
Type | Values Removed | Values Added |
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New CVE |
Information
Published : 2024-05-03 03:15
Updated : 2025-08-07 18:17
NVD link : CVE-2023-42118
Mitre link : CVE-2023-42118
CVE.ORG link : CVE-2023-42118
JSON object : View
Products Affected
libspf2_project
- libspf2
exim
- exim
CWE
CWE-191
Integer Underflow (Wrap or Wraparound)