CVE-2019-25034

** EN DISPUTA ** Unbound versiones anteriores a 1.9.5, permite un desbordamiento de enteros en la función sldns_str2wire_dname_buf_origin, conllevando a una escritura fuera de límites. NOTA: El proveedor niega que esto sea una vulnerabilidad. Aunque el código puede ser vulnerable, una instalación de Unbound en funcionamiento no puede ser explotada de forma remota o local

A flaw was found in unbound. An integer overflow in the sldns_str2wire_dname_buf_origin function may lead to a buffer overflow. The highest threat from this vulnerability is to data confidentiality and integrity as well as service availability.

An update that solves 13 vulnerabilities and has three fixes is now available. This update for unbound fixes the following issues. Fixed configuration injection in create_unbound_ad_servers.sh upon a successful man-in-the-middle attack. Fixed integer overflow in the regional allocator via regional_alloc. Fixed integer overflow in the regional allocator via the ALIGN_UP macro. Fixed integer overflow in sldns_str2wire_dname_buf_origin, leading to an out-of-bounds write. Fixed out-of-bounds write in sldns_bget_token_par. Fixed assertion failure and denial of service in synth_cname. Fixed assertion failure and denial of service in dname_pkt_copy via an invalid packet. Fixed integer overflow in a size calculation in dnscrypt/dnscrypt.c. Fixed integer overflow in a size calculation in respip/respip.c. Fixed infinite loop via a compressed name in dname_pkt_copy. Fixed assertion failure via a compressed name in dname_pkt_copy. Fixed out-of-bounds write via a compressed name in rdata_copy. Fixed symbolic link traversal when writing PID file.