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    CVE-2023-50784

    A buffer overflow in websockets in UnrealIRCd 6.1.0 through 6.1.3 before 6.1.4 allows an unauthenticated remote attacker to crash the server by sending an oversized packet (if a websocket port is open). Remote code execution might be possible on some uncommon, older platforms.

    Published:Dec 16, 2023
    Last Modified:Nov 4, 2025
    EPS:Dec 16, 2023
    EPSS Score:0.01164
    CVSS Score:7.5

    Affected Products

    Vendor
    Unrealircd
    Product
    Unrealircd

    Exploits

    No exploit reference

    Related CVEs

    CVE-2017-13649 (CVSS 5.5) — UnrealIRCd 4.0.13 and earlier creates a PID file after dropping privileges to a non-root account, which might …
    CVE-2016-7144 (CVSS 8.1) — The m_authenticate function in modules/m_sasl.c in UnrealIRCd before 3.2.10.7 and 4.x before 4.0.6 allows remo…
    CVE-2013-7384 (CVSS 5) — UnrealIRCd 3.2.10 before 3.2.10.2 allows remote attackers to cause a denial of service (NULL pointer dereferen…
    CVE-2013-6413 (CVSS 5) — Use-after-free vulnerability in UnrealIRCd 3.2.10 before 3.2.10.2 allows remote attackers to cause a denial of…
    CVE-2009-4893 (CVSS 6.8) — Buffer overflow in UnrealIRCd 3.2beta11 through 3.2.8, when allow::options::noident is enabled, allows remote …
    CVE-2010-2075 (CVSS 7.5) — UnrealIRCd 3.2.8.1, as distributed on certain mirror sites from November 2009 through June 2010, contains an e…

    References

    https://forums.unrealircd.org/viewtopic.php?t=9340
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BV6TFYPQOKYRGPEAKOWSO6PSCBV6LUR3/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EZT7QU4FCQBHYOYVD7FW5QAWNAQCSGLA/
    https://www.unrealircd.org/index/news
    https://forums.unrealircd.org/viewtopic.php?t=9340
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BV6TFYPQOKYRGPEAKOWSO6PSCBV6LUR3/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EZT7QU4FCQBHYOYVD7FW5QAWNAQCSGLA/
    https://lists.fedoraproject.org/archives/list/[email protected]/message/BV6TFYPQOKYRGPEAKOWSO6PSCBV6LUR3/
    https://lists.fedoraproject.org/archives/list/[email protected]/message/EZT7QU4FCQBHYOYVD7FW5QAWNAQCSGLA/
    https://www.unrealircd.org/index/news

    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