CVE-2024-25629

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    CVE-2024-25629

    Published: 23 Feb 2024Last Modified: 13 Sept 2026

    Summary: c-ares out of bounds read in ares__read_line()

    Details: c-ares is a C library for asynchronous DNS requests. `ares__read_line()` is used to parse local configuration files such as `/etc/resolv.conf`, `/etc/nsswitch.conf`, the `HOSTALIASES` file, and if using a c-ares version prior to 1.27.0, the `/etc/hosts` file. If any of these configuration files has an embedded `NULL` character as the first character in a new line, it can lead to attempting to read memory prior to the start of the given buffer which may result in a crash. This issue is fixed in c-ares 1.27.0. No known workarounds exist.

    References: https://lists.fedoraproject.org/archives/list/[email protected]/message/2P76QYINQNPEHUTEEDOUYIRZ2X6UVZ5K/, https://lists.fedoraproject.org/archives/list/[email protected]/message/CSCMTSPDIE2UHU34TIXQQHZ6JTE3Y3VF/, https://lists.fedoraproject.org/archives/list/[email protected]/message/GX37LFPFQ3T6FFMMFYQTEGIQXXN7F27U/, https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/25xxx/CVE-2024-25629.json, https://github.com/c-ares/c-ares/security/advisories/GHSA-mg26-v6qh-x48q, https://nvd.nist.gov/vuln/detail/CVE-2024-25629, https://github.com/c-ares/c-ares/commit/a804c04ddc8245fc8adf0e92368709639125e183

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -9eb57f2c8beb4e8af590992e56182c0788b9ce0b

    Affected versions

    cares-1_26_0

    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
    CVE-2024-25629 | CVE-DB