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Important kernel security update: Virtuozzo ReadyKernel patch 91.0 for Virtuozzo 7.0 and Virtuozzo Infrastructure Platform 2.5, 3.0

Description

The cumulative Virtuozzo ReadyKernel patch was updated with security fixes. The patch applies to the kernels 3.10.0-693.21.1.vz7.48.2 (Virtuozzo 7.0.7 HF3), 3.10.0-862.9.1.vz7.63.3 (Virtuozzo 7.0.8), 3.10.0-862.11.6.vz7.64.7 (Virtuozzo 7.0.8 HF1), 3.10.0-862.20.2.vz7.73.24 (Virtuozzo 7.0.9 and Virtuozzo Infrastructure Platform 2.5), 3.10.0-862.20.2.vz7.73.29 (Virtuozzo 7.0.9 and Virtuozzo Infrastructure Platform 2.5), 3.10.0-957.10.1.vz7.85.17 (Virtuozzo 7.0.10), 3.10.0-957.12.2.vz7.86.2 (Virtuozzo 7.0.10 HF1), 3.10.0-957.12.2.vz7.96.21 (Virtuozzo 7.0.11 and Virtuozzo Infrastructure Platform 3.0). **Vulnerability id:** CVE-2019-15239 [3.10.0-693.21.1.vz7.48.2 to 3.10.0-957.12.2.vz7.96.21] Potential kernel crash in __tcp_retransmit_skb(). It was discovered that a local unprivileged attacker could use a specially crafted sequence of system calls to trigger either a kernel crash in __tcp_retransmit_skb() or use-after-free conditions, which could result in privilege escalation. **Vulnerability id:** CVE-2019-14821 [3.10.0-693.21.1.vz7.48.2 to 3.10.0-957.12.2.vz7.96.21] KVM: Out-of-bounds memory access via MMIO ring buffer. An issue was found in the implementation of the coalesced MMIO write operation in KVM. The indices used to access an MMIO ring buffer could be supplied by a user-space process in the host system. An attacker with access to /dev/kvm could use this flaw to trigger out-of-bounds memory access and crash the host kernel or, potentially, escalate their privileges.


Affected Package


OS OS Version Package Name Package Version
Virtuozzo Infrastructure Platform 2.5 readykernel-patch-85.17 91.0-1.vl7
Virtuozzo 7.0 readykernel-patch-73.24 91.0-1.vl7
Virtuozzo 7.0 readykernel-patch-96.21 91.0-1.vl7
Virtuozzo Infrastructure Platform 2.5 readykernel-patch-96.21 91.0-1.vl7
Virtuozzo Infrastructure Platform 3.0 readykernel-patch-63.3 91.0-1.vl7
Virtuozzo Infrastructure Platform 3.0 readykernel-patch-64.7 91.0-1.vl7
Virtuozzo 7.0 readykernel-patch-64.7 91.0-1.vl7
Virtuozzo Infrastructure Platform 3.0 readykernel-patch-48.2 91.0-1.vl7
Virtuozzo Infrastructure Platform 3.0 readykernel-patch-86.2 91.0-1.vl7
Virtuozzo Infrastructure Platform 2.5 readykernel-patch-73.24 91.0-1.vl7
Virtuozzo 7.0 readykernel-patch-63.3 91.0-1.vl7
Virtuozzo Infrastructure Platform 3.0 readykernel-patch-73.24 91.0-1.vl7
Virtuozzo Infrastructure Platform 3.0 readykernel-patch-96.21 91.0-1.vl7
Virtuozzo Infrastructure Platform 3.0 readykernel-patch-85.17 91.0-1.vl7
Virtuozzo Infrastructure Platform 3.0 readykernel-patch-73.29 91.0-1.vl7
Virtuozzo Infrastructure Platform 2.5 readykernel-patch-64.7 91.0-1.vl7
Virtuozzo 7.0 readykernel-patch-85.17 91.0-1.vl7
Virtuozzo Infrastructure Platform 2.5 readykernel-patch-63.3 91.0-1.vl7
Virtuozzo 7.0 readykernel-patch-86.2 91.0-1.vl7
Virtuozzo 7.0 readykernel-patch-73.29 91.0-1.vl7
Virtuozzo 7.0 readykernel-patch-48.2 91.0-1.vl7
Virtuozzo Infrastructure Platform 2.5 readykernel-patch-86.2 91.0-1.vl7
Virtuozzo Infrastructure Platform 2.5 readykernel-patch-73.29 91.0-1.vl7
Virtuozzo Infrastructure Platform 2.5 readykernel-patch-48.2 91.0-1.vl7

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