UBUNTU-CVE-2023-4806

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    UBUNTU-CVE-2023-4806

    Published: 18 Sept 2023Last Modified: 22 Apr 2026
    Upstream:
    CVE-2023-4806

    Summary:

    Details: A flaw has been identified in glibc. In an extremely rare situation, the getaddrinfo function may access memory that has been freed, resulting in an application crash. This issue is only exploitable when a NSS module implements only the _nss_*_gethostbyname2_r and _nss_*_getcanonname_r hooks without implementing the _nss_*_gethostbyname3_r hook. The resolved name should return a large number of IPv6 and IPv4, and the call to the getaddrinfo function should have the AF_INET6 address family with AI_CANONNAME, AI_ALL and AI_V4MAPPED as flags.

    References: https://ubuntu.com/security/CVE-2023-4806, https://ubuntu.com/security/notices/USN-6541-1, https://ubuntu.com/security/notices/USN-6541-2, https://www.cve.org/CVERecord?id=CVE-2023-4806

    Affected packages

    Package

    Name: eglibc

    Purl: pkg:deb/ubuntu/[email protected]+esm4?arch=source&distro=esm-infra-legacy/trusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    2.17-93ubuntu4

    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-2023-4806 | CVE-DB