Alpine: multiple xen packages: security update to 4.17.0-r5

high Tenable Self-Hosted Container Security Plugin ID 424717

Description

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)

Plugin Details

Severity: High

ID: 424717

Version: Revision 1.16

Type: Local

Family: Alpine Linux Local Security Checks

Published: 4/4/2025

Updated: 6/1/2026

Supported Sensors: Agentless Assessment

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2022-42335

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 3/21/2023

Reference Information

CVE: CVE-2022-42331, CVE-2022-42332, CVE-2022-42333, CVE-2022-42335, CVE-2022-43334

Detections

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