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    CVE-2023-41045

    Graylog is a free and open log management platform. Graylog makes use of only one single source port for DNS queries. Graylog binds a single socket for outgoing DNS queries and while that socket is bound to a random port number it is never changed again. This goes against recommended practice since 2008, when Dan Kaminsky discovered how easy is to carry out DNS cache poisoning attacks. In order to prevent cache poisoning with spoofed DNS responses, it is necessary to maximise the uncertainty in the choice of a source port for a DNS query. Although unlikely in many setups, an external attacker could inject forged DNS responses into a Graylog's lookup table cache. In order to prevent this, it is at least recommendable to distribute the DNS queries through a pool of distinct sockets, each of them with a random source port and renew them periodically. This issue has been addressed in versions 5.0.9 and 5.1.3. Users are advised to upgrade. There are no known workarounds for this issue.

    Published:Aug 31, 2023
    Last Modified:Nov 21, 2024
    EPS:Aug 31, 2023
    EPSS Score:0.00134
    CVSS Score:3.7

    Affected Products

    Vendor
    Graylog
    Product
    Graylog

    Exploits

    https://github.com/Graylog2/graylog2-server/security/advisories/GHSA-g96c-x7rh-99r3https://github.com/Graylog2/graylog2-server/security/advisories/GHSA-g96c-x7rh-99r3

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    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