It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2024-522 advisory.

    A flaw was found in xorg-server. Querying or changing XKB button actions such as moving from a touchpad to     a mouse can result in out-of-bounds memory reads and writes. This may allow local privilege escalation or     possible remote code execution in cases where X11 forwarding is involved. (CVE-2023-6377)

    A flaw was found in xorg-server. A specially crafted request to RRChangeProviderProperty or     RRChangeOutputProperty can trigger an integer overflow which may lead to a disclosure of sensitive     information. (CVE-2023-6478)

    Heap buffer overflow in DeviceFocusEvent and ProcXIQueryPointer

    NOTE: https://lists.x.org/archives/xorg/2024-January/061525.htmlNOTE:
    https://gitlab.freedesktop.org/xorg/xserver/-/commit/9e2ecb2af8302dedc49cb6a63ebe063c58a9e7e3     (CVE-2023-6816)

    Reattaching to different master device may lead to out-of-bounds memory access

    NOTE: https://lists.x.org/archives/xorg/2024-January/061525.htmlNOTE:
    https://gitlab.freedesktop.org/xorg/xserver/-/commit/ece23be888a93b741aa1209d1dbf64636109d6a5NOTE:
    https://gitlab.freedesktop.org/xorg/xserver/-/commit/219c54b8a3337456ce5270ded6a67bcde53553d5NOTE:
    https://gitlab.freedesktop.org/xorg/xserver/-/commit/df3c65706eb169d5938df0052059f3e0d5981b74     (CVE-2024-0229)

    SELinux unlabeled GLX PBuffer

    NOTE: https://lists.x.org/archives/xorg/2024-January/061525.htmlNOTE:
    https://gitlab.freedesktop.org/xorg/xserver/-/commit/e5e8586a12a3ec915673edffa10dc8fe5e15dac3     (CVE-2024-0408)

    SELinux context corruption

    NOTE: https://lists.x.org/archives/xorg/2024-January/061525.htmlNOTE:
    https://gitlab.freedesktop.org/xorg/xserver/-/commit/2ef0f1116c65d5cb06d7b6d83f8a1aea702c94f7     (CVE-2024-0409)

    Heap buffer overflow in XISendDeviceHierarchyEvent

    NOTE: https://lists.x.org/archives/xorg/2024-January/061525.htmlNOTE:
    https://gitlab.freedesktop.org/xorg/xserver/-/commit/4a5e9b1895627d40d26045bd0b7ef3dce503cbd1     (CVE-2024-21885)

    Heap buffer overflow in DisableDevice

    NOTE: https://lists.x.org/archives/xorg/2024-January/061525.htmlNOTE:
    https://gitlab.freedesktop.org/xorg/xserver/-/commit/bc1fdbe46559dd947674375946bbef54dd0ce36bNOTE:
    https://gitlab.freedesktop.org/xorg/xserver/-/commit/26769aa71fcbe0a8403b7fb13b7c9010cc07c3a8     (CVE-2024-21886)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

According to the versions of the xorg-x11-server package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - A flaw was found in xorg-server. Querying or changing XKB button actions such as moving from a touchpad to     a mouse can result in out-of-bounds memory reads and writes. This may allow local privilege escalation or     possible remote code execution in cases where X11 forwarding is involved. (CVE-2023-6377)

  - A flaw was found in xorg-server. A specially crafted request to RRChangeProviderProperty or     RRChangeOutputProperty can trigger an integer overflow which may lead to a disclosure of sensitive     information. (CVE-2023-6478)

  - A flaw was found in X.Org server. Both DeviceFocusEvent and the XIQueryPointer reply contain a bit for     each logical button currently down. Buttons can be arbitrarily mapped to any value up to 255, but the     X.Org Server was only allocating space for the device's particular number of buttons, leading to a heap     overflow if a bigger value was used. (CVE-2023-6816)

  - An out-of-bounds memory access flaw was found in the X.Org server. This issue can be triggered when a     device frozen by a sync grab is reattached to a different master device. This issue may lead to an     application crash, local privilege escalation (if the server runs with extended privileges), or remote     code execution in SSH X11 forwarding environments. (CVE-2024-0229)

  - A flaw was found in the X.Org server. The GLX PBuffer code does not call the XACE hook when creating the     buffer, leaving it unlabeled. When the client issues another request to access that resource (as with a     GetGeometry) or when it creates another resource that needs to access that buffer, such as a GC, the     XSELINUX code will try to use an object that was never labeled and crash because the SID is NULL.
    (CVE-2024-0408)

  - A flaw was found in the X.Org server. The cursor code in both Xephyr and Xwayland uses the wrong type of     private at creation. It uses the cursor bits type with the cursor as private, and when initiating the     cursor, that overwrites the XSELINUX context. (CVE-2024-0409)

  - A flaw was found in X.Org server. In the XISendDeviceHierarchyEvent function, it is possible to exceed the     allocated array length when certain new device IDs are added to the xXIHierarchyInfo struct. This can     trigger a heap buffer overflow condition, which may lead to an application crash or remote code execution     in SSH X11 forwarding environments. (CVE-2024-21885)

  - A heap buffer overflow flaw was found in the DisableDevice function in the X.Org server. This issue may     lead to an application crash or, in some circumstances, remote code execution in SSH X11 forwarding     environments. (CVE-2024-21886)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Published	Updated	Severity
190736	Amazon Linux 2023 : xorg-x11-server-common, xorg-x11-server-devel, xorg-x11-server-source (ALAS2023-2024-522)	Nessus	Amazon Linux Local Security Checks	2/20/2024	12/11/2024	critical
191800	EulerOS 2.0 SP11 : xorg-x11-server (EulerOS-SA-2024-1232)	Nessus	Huawei Local Security Checks	3/12/2024	3/12/2024	critical
191838	EulerOS 2.0 SP11 : xorg-x11-server (EulerOS-SA-2024-1254)	Nessus	Huawei Local Security Checks	3/12/2024	3/12/2024	critical
191980	EulerOS 2.0 SP10 : xorg-x11-server (EulerOS-SA-2024-1330)	Nessus	Huawei Local Security Checks	3/12/2024	3/12/2024	critical

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