QID 670924

Unbound is a validating, recursive, and caching DNS(SEC) resolver.The C implementation of Unbound is developed and maintained by NLnet Labs. It is based on ideas and algorithms taken from a java prototype developed by Verisign labs, Nominet, Kirei and ep.net.Unbound is designed as a set of modular components, so that also DNSSEC (secure DNS) validation and stub-resolvers (that do not run as a server, but are linked into an application) are easily possible. Security Fix(es): Unbound before 1.9.5 allows configuration injection in create_unbound_ad_servers.sh upon a successful man-in-the-middle attack against a cleartext HTTP session.(CVE-2019-25031) Unbound before 1.9.5 allows an integer overflow in the regional allocator via regional_alloc.(CVE-2019-25032) Unbound before 1.9.5 allows an integer overflow in the regional allocator via the ALIGN_UP macro.(CVE-2019-25033) Unbound before 1.9.5 allows an integer overflow in sldns_str2wire_dname_buf_origin, leading to an out-of-bounds write.(CVE-2019-25034) Unbound before 1.9.5 allows an out-of-bounds write in sldns_bget_token_par.(CVE-2019-25035) Unbound before 1.9.5 allows an assertion failure and denial of service in synth_cname.(CVE-2019-25036) Unbound before 1.9.5 allows an assertion failure and denial of service in dname_pkt_copy via an invalid packet.(CVE-2019-25037) Unbound before 1.9.5 allows an integer overflow in a size calculation in dnscrypt/dnscrypt.c.(CVE-2019-25038) Unbound before 1.9.5 allows an integer overflow in a size calculation in respip/respip.c.(CVE-2019-25039) Unbound before 1.9.5 allows an infinite loop via a compressed name in dname_pkt_copy.(CVE-2019-25040) Unbound before 1.9.5 allows an assertion failure via a compressed name in dname_pkt_copy.(CVE-2019-25041) Unbound before 1.9.5 allows an out-of-bounds write via a compressed name in rdata_copy.(CVE-2019-25042)
Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

An arbitrary attacker may exploit this vulnerability to compromise the system.