|Related CVE||CVE-2020-8616 CVE-2020-8617|
Several vulnerabilities were discovered in BIND, a DNS server implementation.
It was discovered that BIND does not sufficiently limit the number of fetches performed when processing referrals. An attacker can take advantage of this flaw to cause a denial of service (performance degradation) or use the recursing server in a reflection attack with a high amplification factor.
It was discovered that a logic error in the code which checks TSIG validity can be used to trigger an assertion failure, resulting in denial of service.
For Debian 7 Wheezy, these problems have been fixed in version 1:9.8.4.dfsg.P1-6+nmu2+deb7u24.
We recommend that you upgrade your bind9 packages.
Further information about Extended LTS security advisories can be found at: https://deb.freexian.com/extended-lts/