Nextcloud: Ratelimiting can be bypassed using IPv6 subnets

Nextcloud hardcodes IPv6 subnets to /128. End users get at least a /64 subnet more than the whole IPv4 address space!, most providers assign even larger subnets like /48. The subnet is used to block bruteforce attempts 3 and rate limiting 4. An attacker can easily generate random addresses from t...

Fedora: Security Advisory for perl-Net-Netmask (FEDORA-2021-3d96cfe6a3)

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...

Fedora: Security Advisory for perl-Net-Netmask (FEDORA-2021-3d96cfe6a3)

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...

[SECURITY] Fedora 34 Update: perl-Net-Netmask-2.0001-1.fc34

Net::Netmask parses and understands IPv4 and IPv6 CIDR blocks see for more information on CIDR blocks. There are also functions to insert a network block into a table and then later look up network blocks by an IP address using that table...

CVE-2021-27245

This vulnerability allows a firewall bypass on affected installations of TP-Link Archer A7 prior to Archer C7USV5210125 and Archer A7USV5200220 AC1750 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of IPv6 connections. The issue...

Authentication flaw

This vulnerability allows a firewall bypass on affected installations of TP-Link Archer A7 prior to Archer C7USV5210125 and Archer A7USV5200220 AC1750 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of IPv6 connections. The issue...

CVE-2021-27245

CVE-2021-27245 affects TP-Link Archer A7 family (A7 AC1750; Archer C7 US variants) prior to the specified V5 firmwares. Root cause: improper filtering of IPv6 SSH connections during IPv6 handling enables a firewall bypass by unauthenticated attackers, who could leverage this in conjunction with o...

CVE-2021-27245

This vulnerability allows a firewall bypass on affected installations of TP-Link Archer A7 prior to Archer C7USV5210125 and Archer A7USV5200220 AC1750 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of IPv6 connections. The issue...

CVE-2021-21727

A ZTE product has a DoS vulnerability. A remote attacker can amplify traffic by sending carefully constructed IPv6 packets to the affected devices, which eventually leads to device denial of service. This affects:...

Code injection

A ZTE product has a DoS vulnerability. A remote attacker can amplify traffic by sending carefully constructed IPv6 packets to the affected devices, which eventually leads to device denial of service. This affects:...

CVE-2021-21727

A ZTE product has a DoS vulnerability. A remote attacker can amplify traffic by sending carefully constructed IPv6 packets to the affected devices, which eventually leads to device denial of service. This affects:...

CVE-2020-7462

In 11.4-PRERELEASE before r360733 and 11.3-RELEASE before p13, improper mbuf handling in the kernel causes a use-after-free bug by sending IPv6 Hop-by-Hop options over the loopback interface. The use-after-free situation may result in unintended kernel behaviour including a kernel panic...

CVE-2020-7462

In 11.4-PRERELEASE before r360733 and 11.3-RELEASE before p13, improper mbuf handling in the kernel causes a use-after-free bug by sending IPv6 Hop-by-Hop options over the loopback interface. The use-after-free situation may result in unintended kernel behaviour including a kernel panic...

Design/Logic Flaw

In 11.4-PRERELEASE before r360733 and 11.3-RELEASE before p13, improper mbuf handling in the kernel causes a use-after-free bug by sending IPv6 Hop-by-Hop options over the loopback interface. The use-after-free situation may result in unintended kernel behaviour including a kernel panic...

CVE-2020-7462

In 11.4-PRERELEASE before r360733 and 11.3-RELEASE before p13, improper mbuf handling in the kernel causes a use-after-free bug by sending IPv6 Hop-by-Hop options over the loopback interface. The use-after-free situation may result in unintended kernel behaviour including a kernel panic...

CVE-2020-7462

CVE-2020-7462 : In FreeBSD, improper mbuf handling in the kernel when sending IPv6 Hop-by-Hop options over the loopback interface leads to a use-after-free, potentially causing kernel panic. Affected releases: FreeBSD 11.4-PRERELEASE before r360733 and 11.3-RELEASE before p13. The issue is docume...

CVE-2020-7462

Removed by vendor...

Cisco IOS XE Software DNS NAT Protocol Application Layer Gateway Denial of Service Vulnerability

A vulnerability in the DNS application layer gateway ALG functionality used by Network Address Translation NAT in Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload. The vulnerability is due to a logic error that occurs when an affected...

CVE-2021-28362

An issue was discovered in Contiki through 3.0. When sending an ICMPv6 error message because of invalid extension header options in an incoming IPv6 packet, there is an attempt to remove the RPL extension headers. Because the packet length and the extension header length are unchecked with respec...

Security update for connman (moderate)

openSUSE Security Update: Security update for connman Announcement ID: openSUSE-SU-2021:0452-1 Rating: moderate References: 1181751 Cross-References: CVE-2021-26675 CVE-2021-26676 CVSS scores: CVE-2021-26675 NVD : 8.8 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2021-26676 NVD : 6.5...