The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2024-2037 advisory.

    - Fix crash caused by fix for CVE-2024-31083       Resolves: RHEL-30981
    - Fix CVE-2024-31080 tigervnc: xorg-x11-server: Heap buffer overread/data leakage in     ProcXIGetSelectedEvents       Resolves: RHEL-31011
    - Fix CVE-2024-31083 tigervnc: xorg-x11-server: User-after-free in ProcRenderAddGlyphs       Resolves: RHEL-30981
    - Fix CVE-2024-31081 tigervnc: xorg-x11-server: Heap buffer overread/data leakage in     ProcXIPassiveGrabDevice       Resolves: RHEL-30998
    - Fix use after free related to CVE-2024-21886       Resolves: RHEL-20432
    - Fix CVE-2024-21886 tigervnc: xorg-x11-server: heap buffer overflow in DisableDevice       Resolves: RHEL-20432
    - Fix CVE-2024-21885 tigervnc: xorg-x11-server: heap buffer overflow in XISendDeviceHierarchyEvent       Resolves: RHEL-20420
    - Fix CVE-2024-0229 tigervnc: xorg-x11-server: reattaching to different master device may lead to out-of-     bounds memory access       Resolves: RHEL-20583
    - Fix CVE-2023-6816 tigervnc: xorg-x11-server: Heap buffer overflow in DeviceFocusEvent and     ProcXIQueryPointer       Resolves: RHEL-21252
    - Updated fix for CVE-2023-6377 tigervnc: xorg-x11-server: out-of-bounds memory reads/writes in XKB button     actions       Resolves: RHEL-18409
    - Fix CVE-2023-6377 tigervnc: xorg-x11-server: out-of-bounds memory reads/writes in XKB button actions       Resolves: RHEL-18409
    - Fix CVE-2023-6478 tigervnc: xorg-x11-server: out-of-bounds memory read in RRChangeOutputProperty and     RRChangeProviderProperty       Resolves: RHEL-18421
    - Fix CVE-2023-5380 tigervnc: xorg-x11-server: Use-after-free bug in DestroyWindow

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 CentOS Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the CESA-2024:3343 advisory.

  - 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-2024-31080)

  - 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-2024-31081)

  - A use-after-free vulnerability was found in the ProcRenderAddGlyphs() function of Xorg servers. This issue     occurs when AllocateGlyph() is called to store new glyphs sent by the client to the X server, potentially     resulting in multiple entries pointing to the same non-refcounted glyphs. Consequently,     ProcRenderAddGlyphs() may free a glyph, leading to a use-after-free scenario when the same glyph pointer     is subsequently accessed. This flaw allows an authenticated attacker to execute arbitrary code on the     system by sending a specially crafted request. (CVE-2024-31083)

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 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2024:9122 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: Heap buffer overread/data leakage in ProcXIGetSelectedEvents (CVE-2024-31080)

    * xorg-x11-server: Heap buffer overread/data leakage in ProcXIPassiveGrabDevice (CVE-2024-31081)

    * xorg-x11-server: Use-after-free in ProcRenderAddGlyphs (CVE-2024-31083)

    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 9.5 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 SUSE Linux SLES12 / SLES_SAP12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2024:1199-1 advisory.

  - 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-2024-31080)

  - 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-2024-31081)

  - A heap-based buffer over-read vulnerability was found in the X.org server's ProcAppleDRICreatePixmap()     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-2024-31082)

  - A use-after-free vulnerability was found in the ProcRenderAddGlyphs() function of Xorg servers. This issue     occurs when AllocateGlyph() is called to store new glyphs sent by the client to the X server, potentially     resulting in multiple entries pointing to the same non-refcounted glyphs. Consequently,     ProcRenderAddGlyphs() may free a glyph, leading to a use-after-free scenario when the same glyph pointer     is subsequently accessed. This flaw allows an authenticated attacker to execute arbitrary code on the     system by sending a specially crafted request. (CVE-2024-31083)

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

The remote host is affected by the vulnerability described in GLSA-202411-08 (X.Org X server, XWayland: Multiple Vulnerabilities)

    Multiple vulnerabilities have been discovered in X.Org X server and XWayland. Please review the CVE     identifiers referenced below for details.

Tenable has extracted the preceding description block directly from the Gentoo 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 Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2025:12751 advisory.

    Virtual Network Computing (VNC) is a remote display system which allows users to view a computing desktop     environment not only on the machine where it is running, but from anywhere on the Internet and from a wide     variety of machine architectures. TigerVNC is a suite of VNC servers and clients.

    Security Fix(es):

    * xorg-x11-server: XTestSwapFakeInput stack overflow (CVE-2022-46340)

    * xorg-x11-server: XIPassiveUngrab out-of-bounds access (CVE-2022-46341)

    * xorg-x11-server: XvdiSelectVideoNotify use-after-free (CVE-2022-46342)

    * xorg-x11-server: ScreenSaverSetAttributes use-after-free (CVE-2022-46343)

    * xorg-x11-server: XIChangeProperty out-of-bounds access (CVE-2022-46344)

    * xorg-x11-server: XkbGetKbdByName use-after-free (CVE-2022-4283)

    * xorg-x11-server: DeepCopyPointerClasses use-after-free leads to privilege elevation (CVE-2023-0494)

    * xorg-x11-server: X.Org Server Overlay Window Use-After-Free Local Privilege Escalation Vulnerability     (CVE-2023-1393)

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

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

    * xorg-x11-server: heap buffer overflow in XISendDeviceHierarchyEvent (CVE-2024-21885,ZDI-CAN-22744)

    * xorg-x11-server: heap buffer overflow in DisableDevice (CVE-2024-21886,ZDI-CAN-22840)

    * xorg-x11-server: reattaching to different master device may lead to out-of-bounds memory access     (CVE-2024-0229,ZDI-CAN-22678)

    * xorg-x11-server: Heap buffer overflow in DeviceFocusEvent and ProcXIQueryPointer (CVE-2023-6816)

    * xorg-x11-server: Heap buffer overread/data leakage in ProcXIGetSelectedEvents (CVE-2024-31080)

    * xorg-x11-server: Heap buffer overread/data leakage in ProcXIPassiveGrabDevice (CVE-2024-31081)

    * xorg-x11-server: Use-after-free in ProcRenderAddGlyphs (CVE-2024-31083)

    * xorg-x11-server: tigervnc: heap-based buffer overflow privilege escalation vulnerability (CVE-2024-9632)

    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.

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 Alibaba Cloud Linux 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALINUX3-SA-2024:0095 advisory.

    Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

    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-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-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-2024-31083:
    A use-after-free vulnerability was found in the ProcRenderAddGlyphs() function of Xorg servers. This issue     occurs when AllocateGlyph() is called to store new glyphs sent by the client to the X server, potentially     resulting in multiple entries pointing to the same non-refcounted glyphs. Consequently,     ProcRenderAddGlyphs() may free a glyph, leading to a use-after-free scenario when the same glyph pointer     is subsequently accessed. This flaw allows an authenticated attacker to execute arbitrary code on the     system by sending a specially crafted request.

Tenable has extracted the preceding description block directly from the Alibaba Cloud 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.

ID	名稱	產品	系列	已發布	已更新	嚴重性
193856	Oracle Linux 8 : tigervnc (ELSA-2024-2037)	Nessus	Oracle Linux Local Security Checks	2024/4/25	2025/9/9	high
197863	CentOS 8 : xorg-x11-server-Xwayland (CESA-2024:3343)	Nessus	CentOS Local Security Checks	2024/5/23	2024/5/23	high
210818	RHEL 9 : xorg-x11-server (RHSA-2024:9122)	Nessus	Red Hat Local Security Checks	2024/11/12	2024/11/12	high
193178	SUSE SLES12 Security Update : xorg-x11-server (SUSE-SU-2024:1199-1)	Nessus	SuSE Local Security Checks	2024/4/11	2024/4/11	high
211499	GLSA-202411-08 : X.Org X server, XWayland: Multiple Vulnerabilities	Nessus	Gentoo Local Security Checks	2024/11/17	2025/2/28	high
243455	RHEL 6 : tigervnc (RHSA-2025:12751)	Nessus	Red Hat Local Security Checks	2025/8/4	2025/8/4	critical
236303	Alibaba Cloud Linux 3 : 0095: tigervnc (ALINUX3-SA-2024:0095)	Nessus	Alibaba Cloud Linux Local Security Checks	2025/5/14	2025/5/14	critical

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