The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2023:4183-1 advisory.

  - The vulnerability exists due to a reachable assertion when handling negative quota values in C Xenstored.
    A malicious guest can craft a transaction that forces C Xenstored to check quota value and perform a     denial of service attack. (CVE-2023-34323)

  - 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 SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2023:4184-1 advisory.

  - The vulnerability exists due to a reachable assertion when handling negative quota values in C Xenstored.
    A malicious guest can craft a transaction that forces C Xenstored to check quota value and perform a     denial of service attack. (CVE-2023-34323)

  - 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 host is affected by the vulnerability described in GLSA-202409-10 (Xen: Multiple Vulnerabilities)

    Multiple vulnerabilities have been discovered in Xen. 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.

When a transaction is committed, C Xenstored will first check the quota is correct before attempting to commit any nodes. It would be possible that accounting is temporarily negative if a node has been removed outside of the transaction.

Unfortunately, some versions of C Xenstored are assuming that the quota cannot be negative and are using assert() to confirm it. This will lead to C Xenstored crash when tools are built without -DNDEBUG (this is the default).

A malicious guest could craft a transaction that will hit the C Xenstored bug and crash it. This will result to the inability to perform any further domain administration like starting new guests, or adding/removing resources to or from any existing guest.

Note that Nessus has not tested for this issue 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-2023:4185-1 advisory.

  - The vulnerability exists due to a reachable assertion when handling negative quota values in C Xenstored.
    A malicious guest can craft a transaction that forces C Xenstored to check quota value and perform a     denial of service attack. (CVE-2023-34323)

  - 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 Fedora 37 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-881672fdab advisory.

    xenstored: A transaction conflict can crash C Xenstored [XSA-440,     CVE-2023-34323]     x86/AMD: missing IOMMU TLB flushing [XSA-442, CVE-2023-34326]     Multiple vulnerabilities in libfsimage disk handling [XSA-443,     CVE-2023-34325]     x86/AMD: Debug Mask handling [XSA-444, CVE-2023-34327,     CVE-2023-34328]

Tenable has extracted the preceding description block directly from the Fedora 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 Fedora 39 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-de338d9f37 advisory.

    xenstored: A transaction conflict can crash C Xenstored [XSA-440,     CVE-2023-34323]     x86/AMD: missing IOMMU TLB flushing [XSA-442, CVE-2023-34326]     Multiple vulnerabilities in libfsimage disk handling [XSA-443,     CVE-2023-34325]     x86/AMD: Debug Mask handling [XSA-444, CVE-2023-34327,     CVE-2023-34328]

Tenable has extracted the preceding description block directly from the Fedora 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 SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2023:4054-1 advisory.

  - The vulnerability exists due to a reachable assertion when handling negative quota values in C Xenstored.
    A malicious guest can craft a transaction that forces C Xenstored to check quota value and perform a     denial of service attack. (CVE-2023-34323)

  - 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-2023:4055-1 advisory.

  - The vulnerability exists due to a reachable assertion when handling negative quota values in C Xenstored.
    A malicious guest can craft a transaction that forces C Xenstored to check quota value and perform a     denial of service attack. (CVE-2023-34323)

  - 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 SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2023:4174-1 advisory.

  - The vulnerability exists due to a reachable assertion when handling negative quota values in C Xenstored.
    A malicious guest can craft a transaction that forces C Xenstored to check quota value and perform a     denial of service attack. (CVE-2023-34323)

  - 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 Fedora 38 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-a4c606585e advisory.

    xenstored: A transaction conflict can crash C Xenstored [XSA-440,     CVE-2023-34323]     x86/AMD: missing IOMMU TLB flushing [XSA-442, CVE-2023-34326]     Multiple vulnerabilities in libfsimage disk handling [XSA-443,     CVE-2023-34325]     x86/AMD: Debug Mask handling [XSA-444, CVE-2023-34327,     CVE-2023-34328]

Tenable has extracted the preceding description block directly from the Fedora 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	Name	Product	Family	Published	Updated	Severity
183860	SUSE SLES15 Security Update : xen (SUSE-SU-2023:4183-1)	Nessus	SuSE Local Security Checks	10/25/2023	1/15/2024	high
183863	SUSE SLES15 Security Update : xen (SUSE-SU-2023:4184-1)	Nessus	SuSE Local Security Checks	10/25/2023	1/15/2024	high
207559	GLSA-202409-10 : Xen: Multiple Vulnerabilities	Nessus	Gentoo Local Security Checks	9/22/2024	12/20/2024	high
182974	Xen: A transaction conflict can crash C Xenstored (XSA-440)	Nessus	Misc.	10/12/2023	1/15/2024	medium
183858	SUSE SLES12 Security Update : xen (SUSE-SU-2023:4185-1)	Nessus	SuSE Local Security Checks	10/25/2023	1/15/2024	high
183933	Fedora 37 : xen (2023-881672fdab)	Nessus	Fedora Local Security Checks	10/26/2023	11/14/2024	high
185217	Fedora 39 : xen (2023-de338d9f37)	Nessus	Fedora Local Security Checks	11/7/2023	11/14/2024	high
183012	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : xen (SUSE-SU-2023:4054-1)	Nessus	SuSE Local Security Checks	10/13/2023	1/15/2024	high
183015	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : xen (SUSE-SU-2023:4055-1)	Nessus	SuSE Local Security Checks	10/13/2023	1/15/2024	high
183861	SUSE SLES15 Security Update : xen (SUSE-SU-2023:4174-1)	Nessus	SuSE Local Security Checks	10/25/2023	1/15/2024	high
183905	Fedora 38 : xen (2023-a4c606585e)	Nessus	Fedora Local Security Checks	10/26/2023	11/14/2024	high

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