The version of xorg-x11-server installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2024-0409 advisory.

  - 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)

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

The version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2024:0652 advisory.

    Package updates are available for TencentOS Server 4 that fix the following vulnerabilities:

    CVE-2024-21886:
    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-2023-5380:
    A use-after-free flaw was found in the xorg-x11-server. An X server crash may occur in a very specific and     legacy configuration (a multi-screen setup with multiple protocol screens, also known as Zaphod mode) if     the pointer is warped from within a window on one screen to the root window of the other screen and if the     original window is destroyed followed by another window being destroyed.

    CVE-2023-6816:
    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-2024-0229:
    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-2024-21885:
    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-2023-6377:
    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-2024-0408:
    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-2024-0409:
    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-2024-31080:
    A heap-based buffer over-read vulnerability was found in the X.org server's ProcXIGetSelectedEvents()     function. This issue occurs when byte-swapped length values are used in replies, potentially leading to     memory leakage and segmentation faults, particularly when triggered by a client with a different     endianness. This vulnerability could be exploited by an attacker to cause the X server to read heap memory     values and then transmit them back to the client until encountering an unmapped page, resulting in a     crash. Despite the attacker's inability to control the specific memory copied into the replies, the small     length values typically stored in a 32-bit integer can result in significant attempted out-of-bounds     reads.

    CVE-2024-31081:
    A heap-based buffer over-read vulnerability was found in the X.org server's ProcXIPassiveGrabDevice()     function. This issue occurs when byte-swapped length values are used in replies, potentially leading to     memory leakage and segmentation faults, particularly when triggered by a client with a different     endianness. This vulnerability could be exploited by an attacker to cause the X server to read heap memory     values and then transmit them back to the client until encountering an unmapped page, resulting in a     crash. Despite the attacker's inability to control the specific memory copied into the replies, the small     length values typically stored in a 32-bit integer can result in significant attempted out-of-bounds     reads.

    CVE-2023-5367:
    A out-of-bounds write flaw was found in the xorg-x11-server. This issue occurs due to an incorrect     calculation of a buffer offset when copying data stored in the heap in the XIChangeDeviceProperty function     in Xi/xiproperty.c and in RRChangeOutputProperty function in randr/rrproperty.c, allowing for possible     escalation of privileges or denial of service.

Tenable has extracted the preceding description block directly from the Tencent Linux 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 packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

    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)

    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 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 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 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)

    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)

Tenable has extracted the preceding description block directly from the EulerOS xorg-x11-server security advisory.

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

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2024-2455 advisory.

    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.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2024:2995 advisory.

    X.Org is an open-source implementation of the X Window System. It provides the basic low-level     functionality that full-fledged graphical user interfaces are designed upon.

    Security Fix(es):

    * xorg-x11-server: Out-of-bounds write in XIChangeDeviceProperty/RRChangeOutputProperty (CVE-2023-5367)

    * xorg-x11-server: out-of-bounds memory reads/writes in XKB button actions (CVE-2023-6377)

    * xorg-x11-server: out-of-bounds memory read in RRChangeOutputProperty and RRChangeProviderProperty     (CVE-2023-6478)

    * xorg-x11-server: reattaching to different master device may lead to out-of-bounds memory access     (CVE-2024-0229)

    * xorg-x11-server: SELinux unlabeled GLX PBuffer (CVE-2024-0408)

    * xorg-x11-server: SELinux context corruption (CVE-2024-0409)

    * xorg-x11-server: heap buffer overflow in XISendDeviceHierarchyEvent (CVE-2024-21885)

    * xorg-x11-server: heap buffer overflow in DisableDevice (CVE-2024-21886)

    * xorg-x11-server: Use-after-free bug in DestroyWindow (CVE-2023-5380)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.10 Release Notes     linked from the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

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

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2024-2995 advisory.

    - Fix use after free related to CVE-2024-21886
    - CVE fix for: CVE-2023-6816, CVE-2024-0229, CVE-2024-21885, CVE-2024-21886,       CVE-2024-0408 and CVE-2024-0409       Resolves: https://issues.redhat.com/browse/RHEL-21207       Resolves: https://issues.redhat.com/browse/RHEL-20528       Resolves: https://issues.redhat.com/browse/RHEL-20378       Resolves: https://issues.redhat.com/browse/RHEL-20384       Resolves: https://issues.redhat.com/browse/RHEL-21191       Resolves: https://issues.redhat.com/browse/RHEL-21198
    - CVE fix for: CVE-2023-6377, CVE-2023-6478       Resolves: https://issues.redhat.com/browse/RHEL-18321       Resolves: https://issues.redhat.com/browse/RHEL-18327
    - CVE fix for: CVE-2023-5380       Resolves: https://issues.redhat.com/browse/RHEL-14060

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

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

The remote Oracle Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the ELSA-2024-2996 advisory.

    - Fix for CVE-2023-6377, CVE-2023-6478

Tenable has extracted the preceding description block directly from the Oracle Linux 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 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)

    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)

    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 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)

    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 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 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)

Tenable has extracted the preceding description block directly from the EulerOS xorg-x11-server 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
207552	CBL Mariner 2.0 Security Update: xorg-x11-server (CVE-2024-0409)	Nessus	MarinerOS Local Security Checks	9/21/2024	2/10/2025	high
238729	TencentOS Server 4: tigervnc (TSSA-2024:0652)	Nessus	Tencent Local Security Checks	6/16/2025	11/20/2025	critical
203698	EulerOS 2.0 SP8 : xorg-x11-server (EulerOS-SA-2024-2063)	Nessus	Huawei Local Security Checks	7/23/2024	7/23/2024	critical
190700	Amazon Linux 2 : xorg-x11-server (ALAS-2024-2455)	Nessus	Amazon Linux Local Security Checks	2/19/2024	12/11/2024	critical
197791	RHEL 8 : xorg-x11-server (RHSA-2024:2995)	Nessus	Red Hat Local Security Checks	5/23/2024	11/7/2024	high
197995	Oracle Linux 8 : xorg-x11-server (ELSA-2024-2995)	Nessus	Oracle Linux Local Security Checks	5/28/2024	9/9/2025	high
198021	Oracle Linux 8 : xorg-x11-server-Xwayland (ELSA-2024-2996)	Nessus	Oracle Linux Local Security Checks	5/28/2024	9/9/2025	critical
198184	EulerOS 2.0 SP12 : xorg-x11-server (EulerOS-SA-2024-1758)	Nessus	Huawei Local Security Checks	5/30/2024	5/30/2024	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

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