CVE-2021-4145

A NULL pointer dereference issue was found in the block mirror layer of QEMU in versions prior to 6.2.0. The self pointer is dereferenced in mirrorwaitonconflicts without ensuring that it's not NULL. A malicious unprivileged user within the guest could use this flaw to crash the QEMU process on t...

Guest can force Linux netback driver to hog large amounts of kernel memory T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Incoming data packets for a guest in the Linux kernel's netback driver are buffered until the guest is ready to process them. There are some measures taken for avoiding to pile up too much data but those can be bypassed by the guest: There is a timeout how long the client side of an interface can stop consuming new packets before it is assumed to have stalled but this timeout is rather long (60 seconds by default). Using a UDP connection on a fast interface can easily accumulate gigabytes of data in that time. (CVE-2021-28715) The timeout could even never trigger if the guest manages to have only one free slot in its RX queue ring page and the next package would require more than one free slot which may be the case when using GSO XDP or software hashing. (CVE-2021-28714)

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Input validation

Insufficient validation of guest context in the SNP Firmware could lead to a potential loss of guest confidentiality...

CVE-2020-15293

Memory corruption in IntLixCrashDumpDmesg, IntLixTaskFetchCmdLine, IntLixFileReadDentry and IntLixFileGetPath due to insufficient guest-data input validation may lead to denial of service conditions...

ALPINE-CVE-2020-29481

An issue was discovered in Xen through 4.14.x. Access rights of Xenstore nodes are per domid. Unfortunately, existing granted access rights are not removed when a domain is being destroyed. This means that a new domain created with the same domid will inherit the access rights to Xenstore nodes...

CVE-2020-1243

A denial of service vulnerability exists when Microsoft Hyper-V on a host server fails to properly validate specific malicious data from a user on a guest operating system. To exploit the vulnerability, an attacker who already has a privileged account on a guest operating system, running as a...

CVE-2020-0890

A denial of service vulnerability exists when Microsoft Hyper-V on a host server fails to properly validate specific malicious data from a user on a guest operating system. To exploit the vulnerability, an attacker who already has a privileged account on a guest operating system, running as a...

CVE-2020-0904

A denial of service vulnerability exists when Microsoft Hyper-V on a host server fails to properly validate specific malicious data from a user on a guest operating system. To exploit the vulnerability, an attacker who already has a privileged account on a guest operating system, running as a...

DEBIAN-CVE-2020-11741

An issue was discovered in xenoprof in Xen through 4.13.x, allowing guest OS users with active profiling to obtain sensitive information about other guests, cause a denial of service, or possibly gain privileges. For guests for which "active" profiling was enabled by the administrator, the xenopr...

Marriott hacked AGAIN – Millions of guests’ data accessed by hackers

By Waqas Marriott International has been hacked again and this time millions of customer data has been stolen just like in 2018. This is a post from HackRead.com Read the original post: Marriott hacked AGAIN - Millions of guests' data accessed by hackers...

Marriott Suffers Second Breach Exposing Data of 5.2 Million Hotel Guests

International hotel chain Marriott today disclosed a data breach impacting nearly 5.2 million hotel guests, making it the second security incident to hit the company in recent years. "At the end of February 2020, we identified that an unexpected amount of guest information may have been accessed...

CVE-2020-0751

A denial of service vulnerability exists when Microsoft Hyper-V on a host server fails to properly validate specific malicious data from a user on a guest operating system.To exploit the vulnerability, an attacker who already has a privileged account on a guest operating system, running as a...

Product update: Virtuozzo 7.0 Update 11 (7.0.11-293)

The Update 11 for Virtuozzo 7.0 provides new features as well as stability and usability bug fixes. It also introduces a new kernel 3.10.0-957.12.2.vz7.96.21. Vulnerability id: PSBM-82223 Under certain circumstances, a VM with IDE disks could crash or corrupt guest data during migration or snapsh...

CVE-2019-5604

In FreeBSD 12.0-STABLE before r350246, 12.0-RELEASE before 12.0-RELEASE-p8, 11.3-STABLE before r350247, 11.3-RELEASE before 11.3-RELEASE-p1, and 11.2-RELEASE before 11.2-RELEASE-p12, the emulated XHCI device included with the bhyve hypervisor did not properly validate data provided by the guest,...

Marriott Faces $123 Million GDPR Fine Over Starwood Data Breach

After fining British Airways with a record fine of £183 million earlier this week, the UK's data privacy regulator is now planning to slap world's biggest hotel chain Marriott International with a £99 million $123 million fine under GDPR over 2014 data breach. This is the second major penalty...

CVE-2018-7079

Aruba ClearPass Policy Manager guest authorization failure. Certain administrative operations in ClearPass Guest do not properly enforce authorization rules, which allows any authenticated administrative user to execute those operations regardless of privilege level. This could allow low-privileg...

DEBIAN-CVE-2017-15589

An issue was discovered in Xen through 4.9.x allowing x86 HVM guest OS users to obtain sensitive information from the host OS or an arbitrary guest OS because intercepted I/O operations can cause a write of data from uninitialized hypervisor stack memory...

ALPINE-CVE-2017-15589

An issue was discovered in Xen through 4.9.x allowing x86 HVM guest OS users to obtain sensitive information from the host OS or an arbitrary guest OS because intercepted I/O operations can cause a write of data from uninitialized hypervisor stack memory...

Exploit for CVE-2017-10235

CVE-2017-10235: VirtualBox E1000 device buffer overflow In...

DEBIAN-CVE-2015-8555

Xen 4.6.x, 4.5.x, 4.4.x, 4.3.x, and earlier do not initialize x86 FPU stack and XMM registers when XSAVE/XRSTOR are not used to manage guest extended register state, which allows local guest domains to obtain sensitive information from other domains via unspecified vectors...