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    CVE-2020-25697

    A privilege escalation flaw was found in the Xorg-x11-server due to a lack of authentication for X11 clients. This flaw allows an attacker to take control of an X application by impersonating the server it is expecting to connect to.

    Published:Nov 9, 2020
    Last Modified:Nov 21, 2024
    EPS:May 26, 2021
    EPSS Score:0.00063
    CVSS Score:7

    Affected Products

    Vendor
    X.org
    Product
    X Server

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-50263 (CVSS 5.5) — A use-after-free flaw was found in the X.Org X server and Xwayland in CreateSaverWindow(). A client can trigge…
    CVE-2026-50259 (CVSS 7.8) — A stack-based buffer overflow flaw was found in the X.Org X server and Xwayland. _XkbSetMapChecks() declares a…
    CVE-2026-50257 (CVSS 7.8) — A use-after-free flaw was found in the X.Org X server and Xwayland in miSyncDestroyFence(). A client that sets…
    CVE-2026-50264 (CVSS 7.8) — An out-of-bounds write flaw was found in the X.Org X server and Xwayland in DRIGetBuffers/DRIGetBuffersWithFor…
    CVE-2026-50260 (CVSS 7.8) — A use-after-free flaw was found in the X.Org X server and Xwayland in FreeCounter(). A client that sets up mul…
    CVE-2026-50261 (CVSS 7.8) — A use-after-free flaw was found in the X.Org X server and Xwayland in SyncChangeCounter(). A client that sets …
    CVE-2026-50258 (CVSS 7.8) — A stack-based buffer overflow flaw was found in the X.Org X server and Xwayland. The X server has multiple sta…
    CVE-2026-50256 (CVSS 7.8) — A stack-based buffer overflow flaw was found in the X.Org X server and Xwayland. A mismatch between the X serv…
    CVE-2026-50262 (CVSS 5.5) — An out-of-bounds read flaw was found in the X.Org X server and Xwayland in __glXDisp_ChangeDrawableAttributes(…
    CVE-2026-34002 (CVSS 6.1) — A flaw was found in the X.Org X server. This vulnerability, an out-of-bounds read, affects the XKB (X Keyboard…

    References

    http://www.openwall.com/lists/oss-security/2020/11/09/3
    http://www.openwall.com/lists/oss-security/2020/11/09/3
    http://www.openwall.com/lists/oss-security/2020/11/09/3
    http://www.openwall.com/lists/oss-security/2020/11/09/3
    https://bugzilla.redhat.com/show_bug.cgi?id=1895295
    https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E
    https://seclists.org/oss-sec/2020/q4/105
    http://www.openwall.com/lists/oss-security/2020/11/09/3
    http://www.openwall.com/lists/oss-security/2020/11/09/3
    http://www.openwall.com/lists/oss-security/2020/11/09/3
    http://www.openwall.com/lists/oss-security/2020/11/09/3
    https://bugzilla.redhat.com/show_bug.cgi?id=1895295
    https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E
    https://seclists.org/oss-sec/2020/q4/105

    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