Kernel: tcp: integer overflow while processing SACK blocks allows remote denial of service

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...

Kernel: tcp: integer overflow while processing SACK blocks allows remote denial of service

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...

SUSE SLES12 Security Update : kernel (SUSE-SU-2019:1692-1) (SACK Panic) (SACK Slowness)

The SUSE Linux Enterprise 12 kernel version 3.12.61 was updated to receive various security and bugfixes. The following security bugs were fixed : CVE-2019-11477: A sequence of SACKs may have been crafted by a remote attacker such that one can trigger an integer overflow, leading to a kernel pani...

Denial Of Service (DoS)

kernel is vulnerable to denial of service. The TCP retransmission queue implementation in tcpfragment could be fragmented when handling certain TCP Selective Acknowledgment SACK sequences, allowing a remote attacker to cause a denial of service condition in the kernel...

Denial Of Service (DoS)

kernel is vulnerable to denial of service. 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...

Virtuozzo 6 : parallels-server-bm-release / vzkernel / etc (VZA-2019-052)

According to the versions of the parallels-server-bm-release / vzkernel / etc packages installed, the Virtuozzo installation on the remote host is affected by the following vulnerabilities : - A double-free can happen in idrremoveall in lib/idr.c in the Linux kernel. An unprivileged local attacke...

SUSE SLES12 Security Update : kernel (SUSE-SU-2019:1668-1) (SACK Panic) (SACK Slowness)

This update for the Linux Kernel 3.12.74-6064107 fixes several issues. The following security issues were fixed : CVE-2019-3846: A flaw that allowed an attacker to corrupt memory and possibly escalate privileges was found in the mwifiex kernel module while connecting to a malicious wireless netwo...

SUSE SLES12 Security Update : kernel (SUSE-SU-2019:1671-1) (SACK Panic) (SACK Slowness)

This update for the Linux Kernel 4.4.121-92104 fixes several issues. The following security issues were fixed : CVE-2019-3846: A flaw that allowed an attacker to corrupt memory and possibly escalate privileges was found in the mwifiex kernel module while connecting to a malicious wireless network...

The vulnerability of the TCP Selective Acknowledgment mechanism in the Linux operating system allows a hacker to trigger a service failure.

The vulnerability of the TCP SACK mechanism TCP Selective Acknowledgement in the Linux operating system is due to a numerical overflow condition. Exploiting this vulnerability allows an attacker to cause a service failure by sending a specially crafted sequence of SACK packets remotely...

Greenbone OS - Kernel Denial of Service Vulnerabilities (Jun 2019)

The Kernel in Greenbone OS is prone to multiple denial of service vulnerabilities. SPDX-FileCopyrightText: 2019 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only CPE =...

Important kernel security update: New kernel 2.6.32-042stab139.1; Virtuozzo 6.0 Update 12 Hotfix 43 (6.0.12-3743)

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-2019-38...

Important kernel security update: Virtuozzo ReadyKernel patch 82.0 for all supported Virtuozzo 7.0 and Virtuozzo Infrastructure Platform 2.5 kernels

The cumulative Virtuozzo ReadyKernel patch was updated with security fixes. The patch applies to all supported kernels of Virtuozzo 7.0 and Virtuozzo Infrastructure Platform 2.5. Vulnerability id: CVE-2019-11477 An integer overflow was found in the way the Linux kernel's networking subsystem...

Important kernel security update: New kernel 2.6.32-042stab139.1 for Virtuozzo Containers for Linux 4.7, Server Bare Metal 5.0

This update provides a new kernel 2.6.32-042stab139.1 for Virtuozzo Containers for Linux 4.7 and Server Bare Metal 5.0 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...

Multiple TCP Selective Acknowledgement (SACK) and Maximum Segment Size (MSS) networking vulnerabilities may cause denial-of-service conditions in Linux and FreeBSD kernels

Overview Multiple TCP Selective Acknowledgement SACK and Maximum Segment Size MSS networking vulnerabilities may cause denial-of-service conditions in Linux and FreeBSD kernels. Description CVE-2019-11477: SACK Panic Linux = 2.6.29. A sequence of specifically crafted selective acknowledgements SA...

RHEL 6 : kernel-rt (RHSA-2019:1487)

The remote Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2019:1487 advisory. The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirement...

openSUSE Security Update : the Linux Kernel (openSUSE-2019-1571) (SACK Panic) (SACK Slowness)

The openSUSE Leap 15.1 was updated to receive various security and bugfixes. The following security bugs were fixed : - CVE-2019-11477: A sequence of SACKs may have been crafted by a remote attacker such that one can trigger an integer overflow, leading to a kernel panic. bsc1137586. -...

bpftool, kernel, perf, python security update

CentOS Errata and Security Advisory CESA-2019:1481 An update for kernel is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity...

CVE-2019-11478

Jonathan Looney discovered that the TCP retransmission queue implementation in tcpfragment in the Linux kernel could be fragmented when handling certain TCP Selective Acknowledgment SACK sequences. A remote attacker could use this to cause a denial of service. This has been fixed in stable kernel...

DEBIAN-CVE-2019-11478

Jonathan Looney discovered that the TCP retransmission queue implementation in tcpfragment in the Linux kernel could be fragmented when handling certain TCP Selective Acknowledgment SACK sequences. A remote attacker could use this to cause a denial of service. This has been fixed in stable kernel...

DEBIAN-CVE-2019-11477

Jonathan Looney discovered that the TCPSKBCBskb-tcpgsosegs value was subject to an integer overflow in the Linux kernel when handling TCP Selective Acknowledgments SACKs. A remote attacker could use this to cause a denial of service. This has been fixed in stable kernel releases 4.4.182, 4.9.182,...