dhcp: double-deletion of the released addresses in the dhcpv6 code leading to crash and possible DoS

There had existed in one of the ISC BIND libraries a bug in a function that was used by dhcpd when operating in DHCPv6 mode. There was also a bug in dhcpd relating to the use of this function per its documentation, but the bug in the library function prevented this from causing any harm. All...

PT-2019-5190 · Isc +5 · Dhcpd +6

Name of the Vulnerable Software and Affected Versions: dhcpd versions prior to 4.4.1 when using BIND versions 9.11.2 or later Description: The issue is related to bugs in the ISC BIND libraries used by dhcpd when operating in DHCPv6 mode, and a bug in dhcpd itself. The bugs can cause a crash,...

bind: failure to clear existing RRSIG records when a NO DATA is negatively cached could DoS named

named in ISC BIND 9.6.2 before 9.6.2-P3, 9.6-ESV before 9.6-ESV-R3, and 9.7.x before 9.7.2-P3 does not properly handle the combination of signed negative responses and corresponding RRSIG records in the cache, which allows remote attackers to cause a denial of service daemon crash via a query for...

Important: Red Hat Bug Fix Advisory: bind bug fix update

Updated bind packages that fix several bugs are now available. BIND Berkeley Internet Name Domain is an implementation of the DNS Domain Name System protocols. The bind package provides a DNS server named, which resolves host names to IP addresses, and tools for control and verification of the DN...

Important: Red Hat Bug Fix Advisory: bind bug fix update

Updated bind packages are available. BIND Berkeley Internet Name Domain is an implementation of the DNS Domain Name System protocols. The bind package provides a DNS server named, which resolves host names to IP addresses, and tools for control and verification of the DNS server. The bind-libs...