В ядре Linux были обнаружены множественные уязвимости, которые могут привести к атаке типа «отказ в обслуживании»:
- CVE-2014-3610
Ларс Булл из Google и Надав Амит сообщили об уязвимости при обработке KVM неканоничных операций записи в некоторые регистры MSR. Привилегированный пользователь гостевой системы может ею воспользоваться для вызова отказа в обслуживания (паники ядра) на хост-системе.
- CVE-2014-3611
Lars Bull of Google reported a race condition in in the PIT emulation code in KVM. A local guest user with access to PIT i/o ports could exploit this flaw to cause a denial of service (crash) on the host.
- CVE-2014-3645 / CVE-2014-3646
The Advanced Threat Research team at Intel Security discovered that the KVM subsystem did not handle the VM exits gracefully for the invept (Invalidate Translations Derived from EPT) and invvpid (Invalidate Translations Based on VPID) instructions. On hosts with an Intel processor and invept/invppid VM exit support, an unprivileged guest user could use these instructions to crash the guest.
- CVE-2014-3647
Nadav Amit reported that KVM mishandles noncanonical addresses when emulating instructions that change rip, potentially causing a failed VM-entry. A guest user with access to I/O or the MMIO can use this flaw to cause a denial of service (system crash) of the guest.
- CVE-2014-3673
Liu Wei of Red Hat discovered a flaw in net/core/skbuff.c leading to a kernel panic when receiving malformed ASCONF chunks. A remote attacker could use this flaw to crash the system.
- CVE-2014-3687
A flaw in the sctp stack was discovered leading to a kernel panic when receiving duplicate ASCONF chunks. A remote attacker could use this flaw to crash the system.
- CVE-2014-3688
It was found that the sctp stack is prone to a remotely triggerable memory pressure issue caused by excessive queueing. A remote attacker could use this flaw to cause denial-of-service conditions on the system.
- CVE-2014-3690
Andy Lutomirski discovered that incorrect register handling in KVM may lead to denial of service.
- CVE-2014-7207
Several Debian developers reported an issue in the IPv6 networking subsystem. A local user with access to tun or macvtap devices, or a virtual machine connected to such a device, can cause a denial of service (system crash).
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