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No exploitation reportedFix available

CVE-2023-42114

No exploitation reported by the sources we read.

  • Published2024-05-03
  • Fixed in4.97 · 4.96.1
  • WeaknessCWE-125

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Exim NTLM Challenge Out-Of-Bounds Read Information Disclosure Vulnerability. This vulnerability allows remote attackers to disclose sensitive information 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 user-supplied data, which can result in a read past the end of an allocated data structure. An attacker can leverage this vulnerability to disclose information in the context of the service account. . Was ZDI-CAN-17433.

Timeline

dates in UTC
  1. 2024-05-0303:15CVE publishedNVD
  2. 2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-11-04 15:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-42114?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-42114?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

CISA-ADP · NVD
Exim
BranchAffectedFixed in
4.97< 4.974.97
4.96< 4.96.14.96.1

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As zdi, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Eximother versions: unknown
    Affected
    • = exim 4.95no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2024-09-18

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • eximWolfiall versions · fixed in 4.96.1-r0
  • eximTuxCare:OracleLinux:6all versions · fixed in 4.92.3-3.el6.tuxcare.els4and 4 other packages
  • eximTuxCare:CentOS:6all versions · fixed in 4.92.3-3.el6.tuxcare.els4and 4 other packages
  • eximSUSE:Package Hub 15 SP5all versions · fixed in 4.94.2-bp155.5.3.1
  • eximSUSE:Package Hub 15 SP5all versions · fixed in 4.97.1-bp155.5.9.1
  • eximSUSE:Package Hub 15 SP4all versions · fixed in 4.94.2-bp155.5.3.1
  • eximopenSUSE:Tumbleweedall versions · fixed in 4.96.1-1.1
  • eximopenSUSE:Leap 15.5all versions · fixed in 4.94.2-bp155.5.3.1

24 more package ranges on OSV.dev

Full record on NVD

Fix

  1. Update Exim to 4.97 · 4.96.1

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Published
2024-05-03
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-h5j4-2q8w-q3q4

Frequently asked questions

What is CVE-2023-42114?

Exim NTLM Challenge Out-Of-Bounds Read Information Disclosure Vulnerability. This vulnerability allows remote attackers to disclose sensitive information 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 user-supplied data, which can result in a read past the end of an allocated data structure. An attacker can leverage this vulnerability to disclose information in the context of the service account. . Was ZDI-CAN-17433.

Is CVE-2023-42114 actively exploited?

Active exploitation of CVE-2023-42114 has not been confirmed. Its EPSS score was 27.1% on 2026-11-03, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-42114?

CVE-2023-42114 has a CVSS v3 base score of 5.3 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

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