New Side Channel Attacks Re-Enable Serious DNS Cache Poisoning Attacks

Researchers have demonstrated yet another variant of the SAD DNS cache poisoning attack that leaves about 38% of the domain name resolvers vulnerable, enabling attackers to redirect traffic originally destined to legitimate websites to a server under their control. "The attack allows an off-path...

ROS-2-2139

2.2139 Remote code execution in nginxCVE-2021-23017 1. Vulnerability Description: The vulnerability allows a remote attacker to execute arbitrary code on the target system. The vulnerability exists due to a single error in the ngxresolvercopyfunction when processing DNS responses. A remote...

Knot Resolver 安全漏洞

Knot Resolver is a cached DNS resolver implementation that includes a resolver library and daemon. A security vulnerability exists in Knot Resolver versions prior to 5.3.2, which can be exploited by attackers to conduct malicious behavior...

OPENSUSE-SU-2021:1815-1 Security update for nginx

This update for nginx fixes the following issues: - CVE-2021-23017: nginx DNS resolver off-by-one heap write bsc1186126...

SUSE: Security Advisory (SUSE-SU-2021:1839-1)

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...

openSUSE: Security Advisory for nginx (openSUSE-SU-2021:0835-1)

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...

SUSE-SU-2021:1839-1 Security update for nginx

This update for nginx fixes the following issues: - CVE-2021-23017: nginx DNS resolver off-by-one heap write bsc1186126...

SUSE-SU-2021:1815-1 Security update for nginx

This update for nginx fixes the following issues: - CVE-2021-23017: nginx DNS resolver off-by-one heap write bsc1186126...

SUSE-SU-2021:1792-1 Security update for nginx

This update for nginx fixes the following issues: - CVE-2021-23017: nginx DNS resolver off-by-one heap write bsc1186126...

USN-4967-2: nginx vulnerability

USN-4967-1 fixed a vulnerability in nginx. This update provides the corresponding update for Ubuntu 14.04 ESM and 16.04 ESM. Original advisory details: Luis Merino, Markus Vervier, and Eric Sesterhenn discovered that nginx incorrectly handled responses to the DNS resolver. A remote attacker could...

Internet Bug Bounty: 1-byte heap buffer overflow in DNS resolver

Official announcement: http://mailman.nginx.org/pipermail/nginx-announce/2021/000300.html A security issue in nginx resolver was identified, which might allow an attacker to cause 1-byte memory overwrite by using a specially crafted DNS response, resulting in worker process crash or, potentially,...

nginx 1.20.0 DNS Resolver Off-By-One Heap Write Exploit

An off-by-one error in ngxresolvercopy while processing DNS responses allows a network attacker to write a dot character '.', 0x2E out of bounds in a heap allocated buffer. The vulnerability can be triggered by a DNS response in reply to a DNS request from nginx when the resolver primitive is...

USN-4967-1 nginx vulnerability

Luis Merino, Markus Vervier, and Eric Sesterhenn discovered that nginx incorrectly handled responses to the DNS resolver. A remote attacker could use this issue to cause nginx to crash, resulting in a denial of service, or possibly execute arbitrary code...

USN-4967-1: nginx vulnerability

Luis Merino, Markus Vervier, and Eric Sesterhenn discovered that nginx incorrectly handled responses to the DNS resolver. A remote attacker could use this issue to cause nginx to crash, resulting in a denial of service, or possibly execute arbitrary code...

nginx 1.20.0 DNS Resolver Off-By-One Heap Write

Advisory X41-2021-002: nginx DNS Resolver Off-by-One Heap Write Vulnerability ============================================================================= Severity Rating: High Confirmed Affected Versions: 0.6.18 - 1.20.0 Confirmed Patched Versions: 1.21.0, 1.20.1 Vendor: F5, Inc. Vendor URL:...

PT-2021-3126

Name of the Vulnerable Software and Affected Versions nginx versions 1.20.0 Description A security issue in the nginx resolver was identified, which might allow an attacker who is able to forge UDP packets from the DNS server to cause a 1-byte memory overwrite, resulting in a worker process crash...

RHEL 8 : bind (RHSA-2021:1989)

"The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2021:1989 advisory. The Berkeley Internet Name Domain BIND is an implementation of the Domain Name System DNS protocols. BIND includes a DNS server named %NASLMINLEVEL...

Moderate: Red Hat Security Advisory: unbound security, bug fix, and enhancement update

An update for unbound is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from th...

Moderate: unbound security, bug fix, and enhancement update

The unbound packages provide a validating, recursive, and caching DNS or DNSSEC resolver. Security Fixes: unbound: integer overflow in the regional allocator via regionalalloc CVE-2019-25032 unbound: integer overflow in sldnsstr2wirednamebuforigin can lead to an out-of-bounds write CVE-2019-25034...

unbound security, bug fix, and enhancement update

An update is available for unbound. This update affects Rocky Linux 8. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list The unbound packages provide a validating, recursive, and caching DNS or DNSS...