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Vulnerability Details :

CVE-2023-42118

Summary
Assigner-zdi
Assigner Org ID-99f1926a-a320-47d8-bbb5-42feb611262e
Published At-03 May, 2024 | 02:13
Updated At-28 Mar, 2025 | 12:04
Rejected At-
Credits

Exim libspf2 Integer Underflow Remote Code Execution Vulnerability

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.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:zdi
Assigner Org ID:99f1926a-a320-47d8-bbb5-42feb611262e
Published At:03 May, 2024 | 02:13
Updated At:28 Mar, 2025 | 12:04
Rejected At:
▼CVE Numbering Authority (CNA)
Exim libspf2 Integer Underflow Remote Code Execution Vulnerability

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.

Affected Products
Vendor
EximExim
Product
libspf2
Default Status
unknown
Versions
Affected
  • exim 4.96-RC0-14-24b8ed847-XX
Problem Types
TypeCWE IDDescription
CWECWE-191CWE-191: Integer Underflow (Wrap or Wraparound)
Type: CWE
CWE ID: CWE-191
Description: CWE-191: Integer Underflow (Wrap or Wraparound)
Metrics
VersionBase scoreBase severityVector
3.07.5HIGH
CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Version: 3.0
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://www.zerodayinitiative.com/advisories/ZDI-23-1472/
x_research-advisory
Hyperlink: https://www.zerodayinitiative.com/advisories/ZDI-23-1472/
Resource:
x_research-advisory
▼Authorized Data Publishers (ADP)
1. CISA ADP Vulnrichment
Affected Products
Vendor
Eximexim
Product
libspf2
CPEs
  • cpe:2.3:a:exim:libspf2:*:*:*:*:*:*:*:*
Default Status
unknown
Versions
Affected
  • From 0 before * (custom)
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
2. CVE Program Container
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://www.zerodayinitiative.com/advisories/ZDI-23-1472/
x_research-advisory
x_transferred
http://www.openwall.com/lists/oss-security/2025/03/28/1
N/A
Hyperlink: https://www.zerodayinitiative.com/advisories/ZDI-23-1472/
Resource:
x_research-advisory
x_transferred
Hyperlink: http://www.openwall.com/lists/oss-security/2025/03/28/1
Resource: N/A
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:zdi-disclosures@trendmicro.com
Published At:03 May, 2024 | 03:15
Updated At:07 Aug, 2025 | 18:17

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Primary3.18.8HIGH
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Secondary3.07.5HIGH
CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Type: Primary
Version: 3.1
Base score: 8.8
Base severity: HIGH
Vector:
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Type: Secondary
Version: 3.0
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CPE Matches
libspf2_project
libspf2_project
>>libspf2>>-
cpe:2.3:a:libspf2_project:libspf2:-:*:*:*:*:*:*:*
Exim
exim
>>exim>>-
cpe:2.3:a:exim:exim:-:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-191Secondaryzdi-disclosures@trendmicro.com
CWE ID: CWE-191
Type: Secondary
Source: zdi-disclosures@trendmicro.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://www.zerodayinitiative.com/advisories/ZDI-23-1472/zdi-disclosures@trendmicro.com
Third Party Advisory
http://www.openwall.com/lists/oss-security/2025/03/28/1af854a3a-2127-422b-91ae-364da2661108
Mailing List
https://www.zerodayinitiative.com/advisories/ZDI-23-1472/af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
Hyperlink: https://www.zerodayinitiative.com/advisories/ZDI-23-1472/
Source: zdi-disclosures@trendmicro.com
Resource:
Third Party Advisory
Hyperlink: http://www.openwall.com/lists/oss-security/2025/03/28/1
Source: af854a3a-2127-422b-91ae-364da2661108
Resource:
Mailing List
Hyperlink: https://www.zerodayinitiative.com/advisories/ZDI-23-1472/
Source: af854a3a-2127-422b-91ae-364da2661108
Resource:
Third Party Advisory

Change History

0
Information is not available yet

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