There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

  - x86: speculative vulnerability in 32bit SYSCALL path Due to an oversight in the very original
    Spectre/Meltdown security work (XSA-254), one entrypath performs its speculation-safety actions too late.
    In some configurations, there is an unprotected RET instruction which can be attacked with a variety of
    speculative attacks. (CVE-2022-42331)

  - x86 shadow plus log-dirty mode use-after-free In environments where host assisted address translation is
    necessary but Hardware Assisted Paging (HAP) is unavailable, Xen will run guests in so called shadow mode.
    Shadow mode maintains a pool of memory used for both shadow page tables as well as auxiliary data
    structures. To migrate or snapshot guests, Xen additionally runs them in so called log-dirty mode. The
    data structures needed by the log-dirty tracking are part of aformentioned auxiliary data. In order to
    keep error handling efforts within reasonable bounds, for operations which may require memory allocations
    shadow mode logic ensures up front that enough memory is available for the worst case requirements.
    Unfortunately, while page table memory is properly accounted for on the code path requiring the potential
    establishing of new shadows, demands by the log-dirty infrastructure were not taken into consideration. As
    a result, just established shadow page tables could be freed again immediately, while other code is still
    accessing them on the assumption that they would remain allocated. (CVE-2022-42332)

  - x86/HVM pinned cache attributes mis-handling T[his CNA information record relates to multiple CVEs; the
    text explains which aspects/vulnerabilities correspond to which CVE.] To allow cachability control for HVM
    guests with passed through devices, an interface exists to explicitly override defaults which would
    otherwise be put in place. While not exposed to the affected guests themselves, the interface specifically
    exists for domains controlling such guests. This interface may therefore be used by not fully privileged
    entities, e.g. qemu running deprivileged in Dom0 or qemu running in a so called stub-domain. With this
    exposure it is an issue that - the number of the such controlled regions was unbounded (CVE-2022-42333), -
    installation and removal of such regions was not properly serialized (CVE-2022-42334). (CVE-2022-42333)

  - x86 shadow paging arbitrary pointer dereference In environments where host assisted address translation is
    necessary but Hardware Assisted Paging (HAP) is unavailable, Xen will run guests in so called shadow mode.
    Due to too lax a check in one of the hypervisor routines used for shadow page handling it is possible for
    a guest with a PCI device passed through to cause the hypervisor to access an arbitrary pointer partially
    under guest control. (CVE-2022-42335)

ID	Name	Product	Family	Severity
424717	Alpine: multiple xen packages: security update to 4.17.0-r5	Tenable Cloud Security	Alpine Linux Local Security Checks	high
424717	Alpine: multiple xen packages: security update to 4.17.0-r5	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	high

Detections

Analytics

CVE-2022-43334

No Score

Tenable Plugins

high

high