CVE-2023-42115

high-risk
Published 2024-05-03

Exim AUTH Out-Of-Bounds Write 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 write past the end of a buffer. An attacker can leverage this vulnerability to execute code in the context of the service account. . Was ZDI-CAN-17434.

Do I need to act?

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70.7% chance of exploitation in next 30 days
EPSS score — higher than 29% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Exim

References (2)

Third Party Advisory https://www.zerodayinitiative.com/advisories/ZDI-23-1469/
Third Party Advisory https://www.zerodayinitiative.com/advisories/ZDI-23-1469/
56
/ 100
high-risk
Severity 32/34 · Critical
Exploitability 19/34 · Moderate
Exposure 5/34 · Minimal