UBUNTU-CVE-2023-42119

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    UBUNTU-CVE-2023-42119

    Published: 28 Sept 2023Last Modified: 22 Apr 2026
    Upstream:
    CVE-2023-42119
    Aliases:
    USN-6455-1

    Summary:

    Details: Exim dnsdb Out-Of-Bounds Read Information Disclosure Vulnerability. This vulnerability allows network-adjacent attackers to disclose sensitive information 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 read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the service account. . Was ZDI-CAN-17643.

    References: https://ubuntu.com/security/CVE-2023-42119, https://www.zerodayinitiative.com/advisories/ZDI-23-1473/, https://exim.org/static/doc/security/CVE-2023-zdi.txt, https://ubuntu.com/security/notices/USN-6455-1, https://www.cve.org/CVERecord?id=CVE-2023-42119

    Affected packages

    Package

    Name: exim4

    Purl: pkg:deb/ubuntu/[email protected]+esm7?arch=source&distro=trusty/esm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -4.82-3ubuntu2.4+esm7

    Affected versions

    4.80-7ubuntu3

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    UBUNTU-CVE-2023-42119 | CVE-DB