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virtuozzoVirtuozzoVZA-2021-008
HistoryFeb 15, 2021 - 12:00 a.m.

[Important] [Security] Virtuozzo ReadyKernel patch 122.0 for Virtuozzo Hybrid Server 7.0, Virtuozzo Infrastructure Platform 3.0, and Virtuozzo Hybrid Infrastructure 3.5, 4.0

2021-02-1500:00:00
help.virtuozzo.com
88

7.2 High

CVSS2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

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

0.0005 Low

EPSS

Percentile

16.0%

The cumulative Virtuozzo ReadyKernel patch was updated with security fixes. The patch applies to the kernels 3.10.0-957.12.2.vz7.96.21 (Virtuozzo Hybrid Server 7.0.11 and Virtuozzo Infrastructure Platform 3.0), 3.10.0-1062.4.2.vz7.116.7 (Virtuozzo Hybrid Server 7.0.12 HF1 and Virtuozzo Hybrid Infrastructure 3.5), 3.10.0-1062.12.1.vz7.131.10 (Virtuozzo Hybrid Server 7.0.13), 3.10.0-1127.8.2.vz7.151.14 (Virtuozzo Hybrid Server 7.0.14), 3.10.0-1127.8.2.vz7.158.8 (Virtuozzo Hybrid Infrastructure 4.0).
Vulnerability id: CVE-2020-29661
[3.10.0-957.12.2.vz7.96.21 to 3.10.0-1127.8.2.vz7.158.8] Incorrect locking in TTY subsystem could lead to use-after-free conditions and cause memory corruption.

Vulnerability id: PSBM-122990
[3.10.0-957.12.2.vz7.96.21 to 3.10.0-1127.8.2.vz7.158.8] ‘Bad unlock balance’ error in ipmr_mfc_seq_stop(). It was discovered that the implementation of IPv6 multicast routing could try to access wrong data when a user tried to read certain files in /proc. An attacker could exploit that from a container to trigger ‘bad unlock balance’ error in ipmr_mfc_seq_stop(), followed by a kernel crash.

Vulnerability id: PSBM-122991
[3.10.0-957.12.2.vz7.96.21 to 3.10.0-1127.8.2.vz7.158.8] Soft lockup in ext4_ext_find_extent(). It was discovered that certain ioctl operations in ext4 did not check their arguments properly. An attacker could exploit that from a container to trigger soft lockups in ext4_ext_find_extent() function, which could result in a denial of service.

7.2 High

CVSS2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

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

0.0005 Low

EPSS

Percentile

16.0%