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
7.8 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:N/A:C
0.974 High
EPSS
Percentile
99.9%
This update provides a new kernel 2.6.32-042stab139.1 for Virtuozzo 6.0 based on the RHEL 6.10 kernel 2.6.32-754.15.3.el6. The new kernel inherits security fixes for SACK-related issues in the TCP stack as well as a few improvements for the MDS vulnerability patches.
Vulnerability id: CVE-2019-3896
A double-free can happen in idr_remove_all() in lib/idr.c in the Linux kernel. An unprivileged local attacker can use this flaw for a privilege escalation or for a system crash and a denial of service (DoS).
Vulnerability id: CVE-2019-11477
An integer overflow flaw was found in the way the Linux kernel’s networking subsystem processed TCP Selective Acknowledgment (SACK) segments. While processing SACK segments, the Linux kernel’s socket buffer (SKB) data structure becomes fragmented. Each fragment is about TCP maximum segment size (MSS) bytes. To efficiently process SACK blocks, the Linux kernel merges multiple fragmented SKBs into one, potentially overflowing the variable holding the number of segments. A remote attacker could use this flaw to crash the Linux kernel by sending a crafted sequence of SACK segments on a TCP connection with small value of TCP MSS, resulting in a denial of service (DoS).
Vulnerability id: CVE-2019-11478
tcp: excessive resource consumption while processing SACK blocks allows remote denial of service.
Vulnerability id: CVE-2019-11479
tcp: excessive resource consumption for TCP connections with low MSS allows remote denial of service.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Virtuozzo | 6.0 | x86_64 | parallels-server-bm-release | < 6.0.12-3743 | parallels-server-bm-release-6.0.12-3743.x86_64.rpm |
Virtuozzo | 6.0 | x86_64 | vzkernel | < 2.6.32-042stab139.1 | vzkernel-2.6.32-042stab139.1.x86_64.rpm |
Virtuozzo | 6.0 | x86_64 | vzkernel-devel | < 2.6.32-042stab139.1 | vzkernel-devel-2.6.32-042stab139.1.x86_64.rpm |
Virtuozzo | 6.0 | noarch | vzkernel-firmware | < 2.6.32-042stab139.1 | vzkernel-firmware-2.6.32-042stab139.1.noarch.rpm |
Virtuozzo | 6.0 | x86_64 | vzmodules | < 2.6.32-042stab139.1 | vzmodules-2.6.32-042stab139.1.x86_64.rpm |
Virtuozzo | 6.0 | x86_64 | vzmodules-devel | < 2.6.32-042stab139.1 | vzmodules-devel-2.6.32-042stab139.1.x86_64.rpm |
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
7.8 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:N/A:C
0.974 High
EPSS
Percentile
99.9%