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    CVE-2023-24626

    socket.c in GNU Screen through 4.9.0, when installed setuid or setgid (the default on platforms such as Arch Linux and FreeBSD), allows local users to send a privileged SIGHUP signal to any PID, causing a denial of service or disruption of the target process.

    Published:Apr 8, 2023
    Last Modified:May 9, 2025
    EPS:Apr 8, 2023
    EPSS Score:0.00063
    CVSS Score:6.5

    Affected Products

    Vendor
    Gnu
    Product
    Screen

    Exploits

    https://www.exploit-db.com/exploits/51252

    Related CVEs

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    CVE-2025-46804 (CVSS 2) — A minor information leak when running Screen with setuid-root privileges allows unprivileged users to deduce i…
    CVE-2021-26937 (CVSS 9.8) — encoding.c in GNU Screen through 4.8.0 allows remote attackers to cause a denial of service (invalid write acc…
    CVE-2020-9366 (CVSS 9.8) — A buffer overflow was found in the way GNU Screen before 4.8.0 treated the special escape OSC 49. Specially cr…
    CVE-2017-5618 (CVSS 7.8) — GNU screen before 4.5.1 allows local users to modify arbitrary files and consequently gain root privileges by …
    CVE-2009-1214 (CVSS 4.9) — GNU screen 4.0.3 creates the /tmp/screen-exchange temporary file with world-readable permissions, which might …
    CVE-2007-3048 (CVSS 7.2) — GNU screen 4.0.3 allows local users to unlock the screen via a CTRL-C sequence at the password prompt. NOTE: …
    CVE-2006-4573 (CVSS 2.6) — Multiple unspecified vulnerabilities in the "utf8 combining characters handling" (utf8_handle_comb function in…
    CVE-2003-0972 (CVSS 10) — Integer signedness error in ansi.c for GNU screen 4.0.1 and earlier, and 3.9.15 and earlier, allows local user…

    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