The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2023:3831-1 advisory.

  - A division-by-zero error on some AMD processors can potentially return speculative data resulting in loss     of confidentiality. (CVE-2023-20588)

  - The vulnerability exists due to improper management of internal resources when running PV guests in shadow     paging mode. A malicious guest can run a specially crafted application on the system that causes shortage     of memory in the associated with the domain shadow pool and forces Xen to tear down page tables. This can     result in memory leak, denial of service or privilege escalation. (CVE-2023-34322)

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

The remote Fedora 39 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-35d2ad2328 advisory.

  - A division-by-zero error on some AMD processors can potentially return speculative data resulting in loss     of confidentiality. (CVE-2023-20588)

  - Arm provides multiple helpers to clean & invalidate the cache for a given region. This is, for instance,     used when allocating guest memory to ensure any writes (such as the ones during scrubbing) have reached     memory before handing over the page to a guest. Unfortunately, the arithmetics in the helpers can overflow     and would then result to skip the cache cleaning/invalidation. Therefore there is no guarantee when all     the writes will reach the memory. (CVE-2023-34321)

  - For migration as well as to work around kernels unaware of L1TF (see XSA-273), PV guests may be run in     shadow paging mode. Since Xen itself needs to be mapped when PV guests run, Xen and shadowed PV guests run     directly the respective shadow page tables. For 64-bit PV guests this means running on the shadow of the     guest root page table. In the course of dealing with shortage of memory in the shadow pool associated with     a domain, shadows of page tables may be torn down. This tearing down may include the shadow root page     table that the CPU in question is presently running on. While a precaution exists to supposedly prevent     the tearing down of the underlying live page table, the time window covered by that precaution isn't large     enough. (CVE-2023-34322)

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

The remote Fedora 38 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-4125279976 advisory.

  - A division-by-zero error on some AMD processors can potentially return speculative data resulting in loss     of confidentiality. (CVE-2023-20588)

  - Arm provides multiple helpers to clean & invalidate the cache for a given region. This is, for instance,     used when allocating guest memory to ensure any writes (such as the ones during scrubbing) have reached     memory before handing over the page to a guest. Unfortunately, the arithmetics in the helpers can overflow     and would then result to skip the cache cleaning/invalidation. Therefore there is no guarantee when all     the writes will reach the memory. (CVE-2023-34321)

  - For migration as well as to work around kernels unaware of L1TF (see XSA-273), PV guests may be run in     shadow paging mode. Since Xen itself needs to be mapped when PV guests run, Xen and shadowed PV guests run     directly the respective shadow page tables. For 64-bit PV guests this means running on the shadow of the     guest root page table. In the course of dealing with shortage of memory in the shadow pool associated with     a domain, shadows of page tables may be torn down. This tearing down may include the shadow root page     table that the CPU in question is presently running on. While a precaution exists to supposedly prevent     the tearing down of the underlying live page table, the time window covered by that precaution isn't large     enough. (CVE-2023-34322)

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

The remote openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2023:4476-1 advisory.

  - A division-by-zero error on some AMD processors can potentially return speculative data resulting in loss     of confidentiality. (CVE-2023-20588)

  - arm32: The cache may not be properly cleaned/invalidated [XSA-437, CVE-2023-34321] top-level shadow     reference dropped too early for 64-bit PV guests [XSA-438, CVE-2023-34322] x86/AMD: Divide speculative     information leak [XSA-439, CVE-2023-20588] (CVE-2023-34322)

  - The vulnerability exists due to insufficient validation of user-supplied input in libfsimage. A remote     guest can use pygrab to trigger stack-based buffer overflow and execute arbitrary code on the host system     (CVE-2023-34325)

  - The vulnerability exists due to missing IOMMU TLB flushing on x86/AMD systems. A malicious guest can     access memory not owned by the guest and escalate privileges on the system. (CVE-2023-34326)

  - The vulnerability exists due to improper validation of guest state when using Debug Masks in HVM vCPU. A     malicious guest can perform a denial of service (DoS) attack against the guest OS. (CVE-2023-34327)

  - The vulnerability exists due to improper validation of guest state in PV vCPU. A malicious guest place a     breakpoint over the live GDT and perform a denial of service (DoS) attack against the host.
    (CVE-2023-34328)

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 SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2023:3832-1 advisory.

  - A division-by-zero error on some AMD processors can potentially return speculative data resulting in loss     of confidentiality. (CVE-2023-20588)

  - The vulnerability exists due to improper management of internal resources when running PV guests in shadow     paging mode. A malicious guest can run a specially crafted application on the system that causes shortage     of memory in the associated with the domain shadow pool and forces Xen to tear down page tables. This can     result in memory leak, denial of service or privilege escalation. (CVE-2023-34322)

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 SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2023:3902-1 advisory.

  - Information exposure through microarchitectural state after transient execution in certain vector     execution units for some Intel(R) Processors may allow an authenticated user to potentially enable     information disclosure via local access. (CVE-2022-40982)

  - A division-by-zero error on some AMD processors can potentially return speculative data resulting in loss     of confidentiality. (CVE-2023-20588)

  - An issue in Zen 2 CPUs, under specific microarchitectural circumstances, may allow an attacker to     potentially access sensitive information. (CVE-2023-20593)

  - The vulnerability exists due to improper management of internal resources when running PV guests in shadow     paging mode. A malicious guest can run a specially crafted application on the system that causes shortage     of memory in the associated with the domain shadow pool and forces Xen to tear down page tables. This can     result in memory leak, denial of service or privilege escalation. (CVE-2023-34322)

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-2023:3894-1 advisory.

  - Information exposure through microarchitectural state after transient execution in certain vector     execution units for some Intel(R) Processors may allow an authenticated user to potentially enable     information disclosure via local access. (CVE-2022-40982)

  - A division-by-zero error on some AMD processors can potentially return speculative data resulting in loss     of confidentiality. (CVE-2023-20588)

  - An issue in Zen 2 CPUs, under specific microarchitectural circumstances, may allow an attacker to     potentially access sensitive information. (CVE-2023-20593)

  - The vulnerability exists due to improper management of internal resources when running PV guests in shadow     paging mode. A malicious guest can run a specially crafted application on the system that causes shortage     of memory in the associated with the domain shadow pool and forces Xen to tear down page tables. This can     result in memory leak, denial of service or privilege escalation. (CVE-2023-34322)

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 SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2023:3895-1 advisory.

  - Information exposure through microarchitectural state after transient execution in certain vector     execution units for some Intel(R) Processors may allow an authenticated user to potentially enable     information disclosure via local access. (CVE-2022-40982)

  - A division-by-zero error on some AMD processors can potentially return speculative data resulting in loss     of confidentiality. (CVE-2023-20588)

  - An issue in Zen 2 CPUs, under specific microarchitectural circumstances, may allow an attacker to     potentially access sensitive information. (CVE-2023-20593)

  - The vulnerability exists due to improper management of internal resources when running PV guests in shadow     paging mode. A malicious guest can run a specially crafted application on the system that causes shortage     of memory in the associated with the domain shadow pool and forces Xen to tear down page tables. This can     result in memory leak, denial of service or privilege escalation. (CVE-2023-34322)

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

The remote Fedora 37 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-948136565a advisory.

  - A division-by-zero error on some AMD processors can potentially return speculative data resulting in loss     of confidentiality. (CVE-2023-20588)

  - Arm provides multiple helpers to clean & invalidate the cache for a given region. This is, for instance,     used when allocating guest memory to ensure any writes (such as the ones during scrubbing) have reached     memory before handing over the page to a guest. Unfortunately, the arithmetics in the helpers can overflow     and would then result to skip the cache cleaning/invalidation. Therefore there is no guarantee when all     the writes will reach the memory. (CVE-2023-34321)

  - For migration as well as to work around kernels unaware of L1TF (see XSA-273), PV guests may be run in     shadow paging mode. Since Xen itself needs to be mapped when PV guests run, Xen and shadowed PV guests run     directly the respective shadow page tables. For 64-bit PV guests this means running on the shadow of the     guest root page table. In the course of dealing with shortage of memory in the shadow pool associated with     a domain, shadows of page tables may be torn down. This tearing down may include the shadow root page     table that the CPU in question is presently running on. While a precaution exists to supposedly prevent     the tearing down of the underlying live page table, the time window covered by that precaution isn't large     enough. (CVE-2023-34322)

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 SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2023:3903-1 advisory.

  - A division-by-zero error on some AMD processors can potentially return speculative data resulting in loss     of confidentiality. (CVE-2023-20588)

  - An issue in Zen 2 CPUs, under specific microarchitectural circumstances, may allow an attacker to     potentially access sensitive information. (CVE-2023-20593)

  - The vulnerability exists due to improper management of internal resources when running PV guests in shadow     paging mode. A malicious guest can run a specially crafted application on the system that causes shortage     of memory in the associated with the domain shadow pool and forces Xen to tear down page tables. This can     result in memory leak, denial of service or privilege escalation. (CVE-2023-34322)

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

The remote openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2023:4475-1 advisory.

  - A division-by-zero error on some AMD processors can potentially return speculative data resulting in loss     of confidentiality. (CVE-2023-20588)

  - arm32: The cache may not be properly cleaned/invalidated [XSA-437, CVE-2023-34321] top-level shadow     reference dropped too early for 64-bit PV guests [XSA-438, CVE-2023-34322] x86/AMD: Divide speculative     information leak [XSA-439, CVE-2023-20588] (CVE-2023-34322)

  - The vulnerability exists due to insufficient validation of user-supplied input in libfsimage. A remote     guest can use pygrab to trigger stack-based buffer overflow and execute arbitrary code on the host system     (CVE-2023-34325)

  - The vulnerability exists due to missing IOMMU TLB flushing on x86/AMD systems. A malicious guest can     access memory not owned by the guest and escalate privileges on the system. (CVE-2023-34326)

  - The vulnerability exists due to improper validation of guest state when using Debug Masks in HVM vCPU. A     malicious guest can perform a denial of service (DoS) attack against the guest OS. (CVE-2023-34327)

  - The vulnerability exists due to improper validation of guest state in PV vCPU. A malicious guest place a     breakpoint over the live GDT and perform a denial of service (DoS) attack against the host.
    (CVE-2023-34328)

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

ID	Name	Product	Family	Published	Updated	Severity
182112	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : xen (SUSE-SU-2023:3831-1)	Nessus	SuSE Local Security Checks	9/28/2023	1/15/2024	high
185221	Fedora 39 : xen (2023-35d2ad2328)	Nessus	Fedora Local Security Checks	11/7/2023	4/29/2024	high
182399	Fedora 38 : xen (2023-4125279976)	Nessus	Fedora Local Security Checks	9/30/2023	4/29/2024	high
185977	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : xen (SUSE-SU-2023:4476-1)	Nessus	SuSE Local Security Checks	11/17/2023	1/15/2024	high
182099	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : xen (SUSE-SU-2023:3832-1)	Nessus	SuSE Local Security Checks	9/28/2023	1/15/2024	high
182391	SUSE SLES15 Security Update : xen (SUSE-SU-2023:3902-1)	Nessus	SuSE Local Security Checks	9/30/2023	1/15/2024	high
182384	SUSE SLES12 Security Update : xen (SUSE-SU-2023:3894-1)	Nessus	SuSE Local Security Checks	9/30/2023	1/15/2024	high
182392	SUSE SLES15 Security Update : xen (SUSE-SU-2023:3895-1)	Nessus	SuSE Local Security Checks	9/30/2023	1/15/2024	high
182947	Fedora 37 : xen (2023-948136565a)	Nessus	Fedora Local Security Checks	10/12/2023	4/29/2024	high
182386	SUSE SLES15 Security Update : xen (SUSE-SU-2023:3903-1)	Nessus	SuSE Local Security Checks	9/30/2023	1/15/2024	high
185975	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : xen (SUSE-SU-2023:4475-1)	Nessus	SuSE Local Security Checks	11/17/2023	1/15/2024	high

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