The Internet Systems Consortium (ISC) has released patches to address multiple security vulnerabilities in the Berkeley Internet Name Domain (BIND) 9 Domain Name System (DNS) software suite that could be exploited to trigger a denial-of-service (DoS) condition.
“A cyber threat actor could exploit one of these vulnerabilities to cause a denial-of-service condition,” the U.S. Cybersecurity and Infrastructure Security Agency (CISA) said in an advisory.
The list of four vulnerabilities is listed below –
Successful exploitation of the aforementioned bugs could cause a named instance to terminate unexpectedly, deplete available CPU resources, slow down query processing by a factor of 100, and render the server unresponsive.
The flaws have been addressed in BIND 9 versions 9.18.28, 9.20.0, and 9.18.28-S1 released earlier this month. There is no evidence that any of the shortcomings have been exploited in the wild.
The disclosure comes months after the ISC addressed another flaw in BIND 9 called KeyTrap (CVE-2023-50387, CVSS score: 7.5) that could be abused to exhaust CPU resources and stall DNS resolvers, resulting in a denial-of-service (DoS).
