Designing sockfuzzer, a network syscall fuzzer for XNU

Posted by Ned Williamson, Project Zero Introduction When I started my 20% project – an initiative where employees are allocated twenty-percent of their paid work time to pursue personal projects – with Project Zero, I wanted to see if I could apply the techniques I had learned fuzzing Chrome to...

Cisco NX-OS Software ICMP Version 6 Memory Leak DoS (cisco-sa-fxos-nxos-icmpv6-dos-YD55jVCq)

A denial of service DoS vulnerability exists in Cisco NX-OS Software due to improper error handling when an IPv6-configured interface receives a specific type of ICMPv6 packet. An unauthenticated, remote attacker can exploit this issue, via a crafted ICMPv6 packet, to cause a slow system memory...

SUSE: Security Advisory (SUSE-SU-2020:3326-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2021 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 ifdescription...

SUSE: Security Advisory (SUSE-SU-2019:1851-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2021 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 ifdescription...

ASB-A-174737972

In icmpglobalallow of icmp.c, there is a possible disclosure of UDP source ports due to a side channel information disclosure. This could lead to remote information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation...

Cisco IOS XR Software Enf Broker DoS (cisco-sa-iosxr-dos-WwDdghs2)

According to its self-reported version, IOS-XR is affected by multiple denial of service vulnerabilities: - A denial of service vulnerability exists in Cisco IOS XR due to a logic error that occurs when an affected device processes Telnet protocol packets. An unauthenticated, remote attacker can...

CentOS: Security Advisory for bpftool (CESA-2021:0856)

The remote host is missing an update for the Copyright C 2021 Greenbone Networks GmbH 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-or-later This program is free software; you can...

CentOS 7 : kernel (RHSA-2021:0856)

The remote CentOS Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:0856 advisory. - In the Linux kernel before 5.3.9, there are multiple out-of-bounds write bugs that can be caused by a malicious USB device in the Linux kernel HID...

RHEL 7 : kernel-rt (RHSA-2021:0857)

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:0857 advisory. The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirement...

RHEL 7 : kernel (RHSA-2021:0856)

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:0856 advisory. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: Local buffer overflow in...

kernel: ICMP rate limiting can be used for DNS poisoning attack

A flaw in the way reply ICMP packets are limited in the Linux kernel functionality was found that allows to quickly scan open UDP ports. This flaw allows an off-path remote user to effectively bypassing source port UDP randomization. The highest threat from this vulnerability is to confidentialit...

kernel: ICMP rate limiting can be used for DNS poisoning attack

A flaw in the way reply ICMP packets are limited in the Linux kernel functionality was found that allows to quickly scan open UDP ports. This flaw allows an off-path remote user to effectively bypassing source port UDP randomization. The highest threat from this vulnerability is to confidentialit...

NewStart CGSL MAIN 6.02 : tcpdump Multiple Vulnerabilities (NS-SA-2021-0082)

The remote NewStart CGSL host, running version MAIN 6.02, has tcpdump packages installed that are affected by multiple vulnerabilities: - The ICMP parser in tcpdump before 4.9.3 has a buffer over-read in print-icmp.c:icmpprint. CVE-2018-14462 - The ICMPv6 parser in tcpdump before 4.9.3 has a buff...

Important: Red Hat Security Advisory: kernel-rt security and bug fix update

An update for kernel-rt is now available for Red Hat Enterprise Linux 8.2 Extended Update Support. 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 rating, is available f...

kernel: ICMP rate limiting can be used for DNS poisoning attack

A flaw in the way reply ICMP packets are limited in the Linux kernel functionality was found that allows to quickly scan open UDP ports. This flaw allows an off-path remote user to effectively bypassing source port UDP randomization. The highest threat from this vulnerability is to confidentialit...

RHEL 8 : kernel (RHSA-2021:0765)

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:0765 advisory. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: bad kfree in auditfilter.c may...

EulerOS Virtualization for ARM 64 3.0.6.0 : qemu-kvm (EulerOS-SA-2021-1527)

According to the versions of the qemu-kvm packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities : - An out-of-bounds read vulnerability was found in the SLiRP networking implementation of the QEMU emulator. This flaw...

Cisco NX-OS Software 安全漏洞

Cisco NX-OS is the network operating system for the Cisco Nexus family of Ethernet switches and the MDS family of Fibre Channel storage area network switches. A denial-of-service vulnerability exists in the ICMPv6 processing in Cisco NX-OS, which can be exploited by an attacker to cause a system...

kernel: ICMP rate limiting can be used for DNS poisoning attack

A flaw in the way reply ICMP packets are limited in the Linux kernel functionality was found that allows to quickly scan open UDP ports. This flaw allows an off-path remote user to effectively bypassing source port UDP randomization. The highest threat from this vulnerability is to confidentialit...

Important: Red Hat Security Advisory: kernel security, bug fix, and enhancement update

An update for kernel is now available for Red Hat Enterprise Linux 8. 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 rating, is available for each vulnerability from th...