Multiple independent vulnerabilities together by first compromising a Order to exploit these vulnerabilities, an attacker would have to chain Rather, these vulnerabilitiesĪllow attacks to be launched *from* such stub-domains. Such stub-domains *themselves* vulnerable. ![]() However, these vulnerabilities do not make XSA-428 and XSA-429 apply only to stub-domains that control HVM qubes In the default Qubes OS configuration, the vulnerabilities reported in XSA-429 does not affect Intel processors. Which likely includes certain family 0x16 models and all later models. XSA-429 affects only AMD processors that support Supervisor ModeĮxecution Prevention (SMEP) or Supervisor Mode Access Prevention (SMAP), XSA-429 allows a malicious paravirtualized (PV) qube to infer theĬontents of arbitrary host memory, including memory assigned to other PrivilegeĮscalation and information leaks cannot be ruled out. "fully-virtualized" (HVM) qube and in which qemu is isolated. A stub-domain is a qube that accompanies a XSA-428 could allow a malicious stub-domain to crash the hypervisor (and | can be attacked with a variety of speculative attacks. | In some configurations, there is an unprotected RET instruction which | work (XSA-254), one entrypath performs its speculation-safety actions | Due to an oversight in the very original Spectre/Meltdown security ![]() ![]() XSA-429 "x86: speculative vulnerability in 32bit SYSCALL path": | - installation and removal of such regions was not properly | - the number of the such controlled regions was unbounded | qemu running in a so called stub-domain. This interface may therefore be used by not | guests themselves, the interface specifically exists for domains | devices, an interface exists to explicitly override defaults which | To allow cachability control for HVM guests with passed through XSA-428 "x86/HVM pinned cache attributes mis-handling": The following security advisories were published on : Passphrase to new PCR values, as PCR18+19 will change due to the new If you use Anti Evil Maid, you will need to reseal your secret ĭom0 must be restarted afterward in order for the updates to take Via the Qubes Update tool or its command-line equivalents. Once available, the packages are to be installed These packages will migrate from the security-testing repository to theĬurrent (stable) repository over the next two weeks after being testedīy the community. ![]() Users must install the following specific packages in order to address Two Xen issues affecting PV (stub-)domains (XSA-428, XSA-429)
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