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virtuozzoVirtuozzoVZA-2020-013
HistoryFeb 10, 2020 - 12:00 a.m.

Important kernel security update: Virtuozzo ReadyKernel patch 97.0 for Virtuozzo 7.0 and Virtuozzo Infrastructure Platform 2.5, 3.0, 3.5

2020-02-1000:00:00
help.virtuozzo.com
64

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

4.6 Medium

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:L/AC:L/Au:N/C:P/I:P/A:P

0.0005 Low

EPSS

Percentile

16.9%

The cumulative Virtuozzo ReadyKernel patch was updated with security and stability fixes. The patch applies to the kernels 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), 3.10.0-1062.4.2.vz7.116.7 (Virtuozzo 7.0.12 HF1 and Virtuozzo Infrastructure Platform 3.5).
Vulnerability id: CVE-2018-20976
[3.10.0-862.9.1.vz7.63.3 to 3.10.0-862.20.2.vz7.73.29] Use-after-free in fs/xfs/xfs_super.c. A flaw was found in the implementation of XFS filesystem where a key data structure (sb->s_fs_info) may not be de-allocated properly when the system is under memory pressure. This could allow a local attacker to create a use-after-free situation which can result in memory corruption or, potentially, privilege escalation.

Vulnerability id: PSBM-94695
[3.10.0-862.9.1.vz7.63.3 to 3.10.0-1062.4.2.vz7.116.7] Kernel crash due to out-of-bounds memory accesses in process_vm_readv(). It was discovered that the implementation of process_vm_readv() system call could try to access memory outside of the structures it was processing in certain cases. A local unprivileged user could use this vulnerability to crash the system.

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

4.6 Medium

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:L/AC:L/Au:N/C:P/I:P/A:P

0.0005 Low

EPSS

Percentile

16.9%