CVE-2023-42114 — Exim NTLM Challenge Out-Of-Bounds Read Information Disclosure Vulnerability

Affected: Exim

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.

USN-6411-1 — exim4 vulnerabilities

Affected: Ubuntu:Pro:14.04:LTS: exim4, Ubuntu:Pro:16.04:LTS: exim4, Ubuntu:Pro:18.04:LTS: exim4, Ubuntu:20.04:LTS: exim4, Ubuntu:22.04:LTS: exim4

It was discovered that Exim incorrectly handled certain challenge requests. A remote attacker could possibly use this issue to perform out-of-bounds reads, resulting in information leakage. (CVE-2023-42114)

It was discovered that Exim incorrectly handled validation of user-supplied data. A remote attacker could possibly use this issue to perform out-of-bounds writes, resulting in arbitrary code execution. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS and Ubuntu 23.04. (CVE-2023-42115)

It was discovered that Exim incorrectly handled certain challenge requests. A remote attacker could possibly use this issue to perform out-of-bounds writes, resulting in arbitrary code execution. (CVE-2023-42116)

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CVE-2023-42114 — Exim NTLM Challenge Out-Of-Bounds Read Information Disclosure Vulnerability

USN-6411-1 — exim4 vulnerabilities