Microsoft Windows DNSAPI NSEC3 Heap-based Buffer Overflow (CVE-2017-11779) - Ver2

A heap-based buffer overflow vulnerability exists in the DNSAPI component of Microsoft Windows. The vulnerability is due to insufficient validation of certain components of NSEC3 records. A remote attacker could exploit this vulnerability by sending a malicious DNS response directly to the target...

Unbound < 1.3.4 NSEC3 Signature Verification DNS Spoofing Vulnerability (CVE-2009-3602)

According to its self-reported version number, the remote Unbound DNS resolver is affected by a remote DNS spoofing vulnerability when verifying NSEC3 signatures. C Tenable Network Security, Inc. include'compat.inc'; if description scriptid106379; scriptversion"1.6";...

powerdns-recursor -- insufficient validation of DNSSEC signatures

PowerDNS Security Advisory reports: An issue has been found in the DNSSEC validation component of PowerDNS Recursor, allowing an ancestor delegation NSEC or NSEC3 record to be used to wrongfully prove the non-existence of a RR below the owner name of that record. This would allow an attacker in...

Fedora 27 : knot / knot-resolver (2017-7a7ea1cf50)

"Major update for Knot DNS and Knot Resolver : Knot Resolver 1.5.0 2017-11-02 ================================ Bugfixes -------- - fix loading modules on Darwin Improvements ------------ - new module tasignalquery supporting Signaling Trust Anchor Knowledge using Keytag Query RFC 8145 section 5...

Fedora 26 : knot / knot-resolver (2017-31519ecf40)

"Major updates for Knot DNS and Knot Resolver: Knot Resolver 1.5.0 2017-11-02 ================================ Bugfixes -------- - fix loading modules on Darwin Improvements ------------ - new module tasignalquery supporting Signaling Trust Anchor Knowledge using Keytag Query RFC 8145 section 5...

Microsoft Windows DNSAPI NSEC3 Heap-based Buffer Overflow (CVE-2017-11779)

A heap-based buffer overflow vulnerability exists in the DNSAPI component of Microsoft Windows. The vulnerability is due to insufficient validation of certain components of NSEC3 records. A remote attacker could exploit this vulnerability by sending a malicious DNS response directly to the target...

Windows KEPT remote code execution vulnerability analysis(CVE-2017-11779)

根据 Microsoft 安全通告，多个版本 Windows 中的 DNSAPI.dll 在处理 DNS response 时可导致 SYSTEM 权限 RCE。 以 DNS Client API DLL 10.0.15063.0 与 10.0.15063.674 为例，补丁对比， 可知漏洞存在于 DNSAPI.dll 中的 Nsec3RecordRead 函数，那么可以确定问题就是出在解析 DNS response 的 NSEC3 Resource record，为了构造 PoC，先得了解这个 "NSEC3" 的背景。首先，DNS 协议数据结构如下图所示， 例如，当访问...

Important vulnerabilities early warning: the Windows DNS client in the broke multiple heap buffer overflow flaws vulnerabilities in bug-bug warning-the black bar safety net

Microsoft has in the 2017 year 10 months official fix for the vulnerability CVE-2017-11779, the vulnerability includes the Windows DNS client in the plurality of memory corruption vulnerabilities, running Windows 8/Server 2012 and an updated version ofOSthe computer will be affected by this...

Fedora 26 : knot-resolver (2017-45ebf1e164)

new upstream release - security fix + security: Knot Resolver 1.2.0 and higher could return AD flag for insecure answer if the daemon received answer with invalid RRSIG several times in a row. + fix: layer/iterate: some improvements in cname chain unrolling + fix: layer/validate: fix duplicate...

Weblate: DNSSEC Zone Walk using NSEC Records

Due to a design flaw in the NSEC records used by DNSSEC it is possible to discover all subdomains of a particular domain for which NSEC records are available. NSEC records are used by the weblate.org domain which means anyone can retreive all subdomains of weblate.org. These subdomains can contai...

Fedora 25 : knot-resolver (2017-df53d02da7)

new upstream release + security: Knot Resolver 1.2.0 and higher could return AD flag for insecure answer if the daemon received answer with invalid RRSIG several times in a row. + fix: layer/iterate: some improvements in cname chain unrolling + fix: layer/validate: fix duplicate records in...

Skyliner: DNSSEC misconfiguration

First of all I will start with some theory. DNS is a system to translate a domain name to an ip address. Normally a computer automatically trust a DNS server and connects to the IP provided by the DNS server. This is prone to security issues because a malicious wifi network, an attacker on your...

CVE-2015-7987

Multiple buffer overflows in mDNSResponder before 625.41.2 allow remote attackers to read or write to out-of-bounds memory locations via vectors involving the 1 GetValueForIPv4Addr, 2 GetValueForMACAddr, 3 rfc3110import, or 4 CopyNSEC3ResourceRecord function...

ISC BIND NSEC3 Signed Zones Queries DoS Vulnerability (Jan 2016)

ISC BIND is prone to a denial of service DoS vulnerability. Copyright C 2016 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; y...

ISC BIND NSEC3-Signed Zones Queries Processing Denial of Service - Ver2 (CVE-2014-0591)

A denial of service vulnerability exists in ISC BIND. The vulnerability is due to a failure to handle queries for NSEC3-signed zones. A remote attacker may exploit this vulnerability by sending a specially crafted query...

Debian DLA-48-1 : bind9 security update

Fix denial of service attack when processing NSEC3-signed zone queries, fixed by not calling memcpy with overlapping ranges in bin/named/query.c. - patch backported from 9.8.6-P2 by Marc Deslauriers from the Ubuntu Security team for USN-2081-1. NOTE: Tenable Network Security has extracted the...

Scientific Linux Security Update : bind97 on SL5.x i386/x86_64 (20140916)

A denial of service flaw was found in the way BIND handled queries for NSEC3-signed zones. A remote attacker could use this flaw against an authoritative name server that served NCES3-signed zones by sending a specially crafted query, which, when processed, would cause named to crash. CVE-2014-05...

bind97 security update

CentOS Errata and Security Advisory CESA-2014:1244 Updated bind97 packages that fix one security issue and one bug are now available for Red Hat Enterprise Linux 5. Red Hat Product Security has rated this update as having Moderate security impact. A Common Vulnerability Scoring System CVSS base...

Moderate: Red Hat Security Advisory: bind97 security and bug fix update

Updated bind97 packages that fix one security issue and one bug are now available for Red Hat Enterprise Linux 5. Red Hat Product Security has rated this update as having Moderate security impact. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is...

Debian DSA-3023-1 : bind9 - security update

Jared Mauch reported a denial of service flaw in the way BIND, a DNS server, handled queries for NSEC3-signed zones. A remote attacker could use this flaw against an authoritative name server that served NCES3-signed zones by sending a specially crafted query, which, when processed, would cause...