DNSSEC validators -- denial-of-service/CPU exhaustion from KeyTrap and NSEC3 vulnerabilities

Simon Kelley reports: If DNSSEC validation is enabled, then an attacker who can force a DNS server to validate a specially crafted signed domain can use a lot of CPU in the validator. This only affects dnsmasq installations with DNSSEC enabled. Stichting NLnet Labs reports: The KeyTrap...

OPENSUSE-SU-2023:0101-1 Security update for pdns-recursor

This update for pdns-recursor fixes the following issues: pdns-recursor was updated to 4.6.6: fixes deterred spoofing attempts can lead to authoritative servers being marked unavailable boo1209897, CVE-2023-26437 Fixes in 4.6.5: When an expired NSEC3 entry is seen, move it to the front of the...

Debian: Security Advisory (DLA-48-1)

The remote host is missing an update for the Debian SPDX-FileCopyrightText: 2023 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...

K00724442: BIG-IP DNS and GTM DNSSEC security exposure

Security Advisory Description The BIG-IP DNSSEC implementation returns an incorrect NSEC3 record for a DNS query for a resource record type, which does not exist at given name. The incorrect record indicates that only one of TXT/HINFO/RP resource record types exists at given name, even if A or AA...

K85021277: BIG-IP DNSSEC security exposure

Security Advisory Description When you configure security extensions for DNS DNSSEC on a virtual server, undisclosed requests result in incorrect NSEC3 records returned. This issue occurs when the following conditions are met: You use DNSSEC on an affected version of BIG-IP DNS formerly known as...

K15133: BIND vulnerability CVE-2014-0591

Security Advisory Description The queryfindclosestnsec3 function in query.c in named in ISC BIND 9.6, 9.7, and 9.8 before 9.8.6-P2 and 9.9 before 9.9.4-P2, and 9.6-ESV before 9.6-ESV-R10-P2, allows remote attackers to cause a denial of service INSIST assertion failure and daemon exit via a crafte...

SUSE CVE-2009-3602

Unbound before 1.3.4 does not properly verify signatures for NSEC3 records, which allows remote attackers to cause secure delegations to be downgraded via DNS spoofing or other DNS-related attacks in conjunction with crafted delegation responses...

SUSE 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...

SUSE CVE-2021-40083

Knot Resolver before 5.3.2 is prone to an assertion failure, triggerable by a remote attacker in an edge case NSEC3 with too many iterations used for a positive wildcard proof...

The vulnerability of the ldns_nsec3_salt_data function in the DNS LDNS library, which allows a hacker to access confidential data

The vulnerability of the ldnsnsec3saltdata function in the DNS LDNS library involves reading data beyond the allowable buffer size. Exploiting this vulnerability allows a remote attacker to gain access to confidential data...

Mageia: Security Advisory (MGASA-2014-0013)

The remote host is missing an update for the SPDX-FileCopyrightText: 2022 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...

CVE-2021-40083

Knot Resolver before 5.3.2 is prone to an assertion failure, triggerable by a remote attacker in an edge case NSEC3 with too many iterations used for a positive wildcard proof...

CVE-2021-40083

Knot Resolver before 5.3.2 is prone to an assertion failure, triggerable by a remote attacker in an edge case NSEC3 with too many iterations used for a positive wildcard proof...

Design/Logic Flaw

Knot Resolver before 5.3.2 is prone to an assertion failure, triggerable by a remote attacker in an edge case NSEC3 with too many iterations used for a positive wildcard proof...

UBUNTU-CVE-2021-40083

Knot Resolver before 5.3.2 is prone to an assertion failure, triggerable by a remote attacker in an edge case NSEC3 with too many iterations used for a positive wildcard proof...

CVE-2021-40083

Knot Resolver before 5.3.2 is prone to an assertion failure, triggerable by a remote attacker in an edge case NSEC3 with too many iterations used for a positive wildcard proof...

CVE-2021-40083

Knot Resolver before 5.3.2 is prone to an assertion failure, triggerable by a remote attacker in an edge case NSEC3 with too many iterations used for a positive wildcard proof...

CVE-2021-40083

Knot Resolver before 5.3.2 is prone to an assertion failure, triggerable by a remote attacker in an edge case NSEC3 with too many iterations used for a positive wildcard proof...

SUSE: Security Advisory (SUSE-SU-2015:0480-1)

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...

Cache Poisoning Attack

bind is vulnerable to cache poisoning attacks. The vulnerability exists as a flaw was found in the BIND DNSSEC NSEC/NSEC3 validation code. If BIND was running as a DNSSEC-validating resolver, it could incorrectly cache NXDOMAIN responses, as if they were valid, for records proven by NSEC or NSEC3...