757 matches found
RHEL 7 : kernel (RHSA-2018:2785)
The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2018:2785 advisory. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: A flaw named SegmentSmack was found in...
kernel: IP fragments with random offsets allow a remote denial of service (FragmentSmack)
A flaw named FragmentSmack was found in the way the Linux kernel handled reassembly of fragmented IPv4 and IPv6 packets. A remote attacker could use this flaw to trigger time and calculation expensive fragment reassembly algorithm by sending specially crafted packets which could lead to a CPU...
kernel: IP fragments with random offsets allow a remote denial of service (FragmentSmack)
A flaw named FragmentSmack was found in the way the Linux kernel handled reassembly of fragmented IPv4 and IPv6 packets. A remote attacker could use this flaw to trigger time and calculation expensive fragment reassembly algorithm by sending specially crafted packets which could lead to a CPU...
Linux kernel denial of service vulnerability (CNVD-2018-19435)
Linux kernel is the kernel used by Linux, the open source operating system released by the Linux Foundation in the United States. A denial of service vulnerability exists in the 'ipfragreasm' function of the net/ipv4/ipfragment.c file in Linux kernel versions 4.19-rc1 through 4.19-rc3, which can ...
DEBIAN-CVE-2018-5391
The Linux kernel, versions 3.9+, is vulnerable to a denial of service attack with low rates of specially modified packets targeting IP fragment re-assembly. An attacker may cause a denial of service condition by sending specially crafted IP fragments. Various vulnerabilities in IP fragmentation...
CVE-2018-6923
In FreeBSD before 11.1-STABLE, 11.2-RELEASE-p2, 11.1-RELEASE-p13, ip fragment reassembly code is vulnerable to a denial of service due to excessive system resource consumption. This issue can allow a remote attacker who is able to send an arbitrary ip fragments to cause the machine to consume...
CVE-2018-6923
In FreeBSD before 11.1-STABLE, 11.2-RELEASE-p2, 11.1-RELEASE-p13, ip fragment reassembly code is vulnerable to a denial of service due to excessive system resource consumption. This issue can allow a remote attacker who is able to send an arbitrary ip fragments to cause the machine to consume...
Linux Kernel IP Fragment Reassembly Denial of Service Vulnerability Affecting Cisco Products: August 2018
On August 14, 2018, the Vulnerability Coordination team of the National Cyber Security Centre of Finland NCSC-FI and the CERT Coordination Center CERT/CC disclosed a vulnerability in the IP stack that is used by the Linux Kernel. This vulnerability is publicly known as FragmentSmack. The...
FreeBSD : FreeBSD -- Resource exhaustion in IP fragment reassembly (359e1548-a652-11e8-805b-a4badb2f4699)
A researcher has notified us of a DoS attack applicable to another operating system. While FreeBSD may not be vulnerable to that exact attack, we have identified several places where inadequate DoS protection could allow an attacker to consume system resources. It is not necessary that the attack...
BSA-2018-696
Security Advisory ID : BSA-2018-696 Component : Kernel Revision : 1.0: Final A TCP data structure in supported versions of FreeBSD 11, 11.1, 11.2, 10, and 10.4 use an inefficient algorithm to reassemble the data. This causes the CPU time spent on segment processing to grow linearly with the numbe...
FreeBSD Denial of Service Vulnerability (CNVD-2020-38784)
FreeBSD is a set of Unix-like free operating systems in the FreeBSD project, headed by the Core Team team, and is an important branch of Unix-like systems that have evolved through BSD, 386BSD, and 4.4BSD. A denial of service vulnerability exists in the ip fragmentation reorganization code in...
QEMU: slirp: heap buffer overflow while reassembling fragmented datagrams
A heap buffer overflow issue was found in the way SLiRP networking back-end in QEMU processes fragmented packets. It could occur while reassembling the fragmented datagrams of an incoming packet. A privileged user/process inside guest could use this flaw to crash the QEMU process resulting in DoS...
Debian DLA-1466-1 : linux-4.9 security update
Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation or denial of service. CVE-2018-5390 SegmentSmack Juha-Matti Tilli discovered that a remote attacker can trigger the worst case code paths for TCP stream reassembly with low rates of specially...
Debian DSA-4272-1 : linux - security update
CVE-2018-5391 FragmentSmack Juha-Matti Tilli discovered a flaw in the way the Linux kernel handled reassembly of fragmented IPv4 and IPv6 packets. A remote attacker can take advantage of this flaw to trigger time and calculation expensive fragment reassembly algorithms by sending specially...
BSA-2018-690
Security Advisory ID : BSA-2018-690 Component : Kernel Revision : 1.0: Final The Linux kernel, versions 3.9+, is vulnerable to a denial of service attack with low rates of specially modified packets targeting IP fragment re-assembly. An attacker may cause a denial of service condition by sending...
UBUNTU-CVE-2018-5391
The Linux kernel, versions 3.9+, is vulnerable to a denial of service attack with low rates of specially modified packets targeting IP fragment re-assembly. An attacker may cause a denial of service condition by sending specially crafted IP fragments. Various vulnerabilities in IP fragmentation...
FreeBSD -- Resource exhaustion in IP fragment reassembly
Problem Description: A researcher has notified us of a DoS attack applicable to another operating system. While FreeBSD may not be vulnerable to that exact attack, we have identified several places where inadequate DoS protection could allow an attacker to consume system resources. It is not...
Updated kernel packages fix security vulnerabilities
This kernel update is based on the upstream 4.14.62 and fixes at least the following security issues: Security researchers from FICORA have identified a remote denial of service attack against the Linux kernel caused by inefficient implementation of TCP segment reassembly, named "SegmentSmack". A...
CVE-2018-6922
One of the data structures that holds TCP segments in all versions of FreeBSD prior to 11.2-RELEASE-p1, 11.1-RELEASE-p12, and 10.4-RELEASE-p10 uses an inefficient algorithm to reassemble the data. This causes the CPU time spent on segment processing to grow linearly with the number of segments in...
