SynopsisThe remote name server is affected by multiple denial of service vulnerabilities.
DescriptionAccording to its self-reported version number, the instance of ISC BIND running on the remote name server is affected by multiple denial of service vulnerabilities :
- A denial of service vulnerability exists in files sexpr.c and alist.c when handling control channel packets. An unauthenticated, remote attacker can exploit this, via crafted packets sent to the control channel (rndc) interface, to cause an assertion failure and daemon exit. (CVE-2016-1285)
- A denial of service vulnerability exists in resolver.c when DNS cookies are enabled. An unauthenticated, remote attacker can exploit this, via a malformed cookie with more than one cookie option, to cause an INSIST assertion failure and daemon exit. (CVE-2016-2088)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
SolutionUpgrade to ISC BIND version 9.9.8-P4 / 9.9.8-S6 / 9.10.3-P4 or later.
Note that version 9.9.8-S6 is a preview version of BIND provided exclusively to ISC Support customers. Additionally, the fix for CVE-2016-2088 is only available in version 9.10.3-P4.