Red Hat Security Advisory: bind security update

Fixed packages 38

Vulnerabilities 2

• High 8.6
  CVE-2020-8616 EPSS 11%

  BIND does not sufficiently limit the number of fetches performed when processing referrals

  A malicious actor who intentionally exploits this lack of effective limitation on the number of fetches performed when processing referrals can, through the use of specially crafted referrals, cause a recursing server to issue a very large number of fetches i…

  ISC BIND9 bind9 bind9 Debian Ubuntu Alpine
  May 19, 2020
• High 7.5
  CVE-2020-8617 Public exploit EPSS 93%

  A logic error in code which checks TSIG validity can be used to trigger an assertion failure in tsig.c

  Using a specially-crafted message, an attacker may potentially cause a BIND server to reach an inconsistent state if the attacker knows (or successfully guesses) the name of a TSIG key used by the server. Since BIND, by default, configures a local session key…

  ISC BIND9 bind9 bind9 Debian Ubuntu Alpine
  May 19, 2020

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=1836118
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=1836124
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2020/rhsa-2020_2404.json
• report
  https://access.redhat.com/security/cve/CVE-2020-8616
• advisory
  https://www.cve.org/CVERecord?id=CVE-2020-8616
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2020-8616
• article
  https://kb.isc.org/docs/cve-2020-8616
• article
  https://www.theregister.co.uk/2020/05/21/nxnaattack_bug_disclosed/
• report
  https://access.redhat.com/security/cve/CVE-2020-8617
• advisory
  https://www.cve.org/CVERecord?id=CVE-2020-8617
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2020-8617
• article
  https://kb.isc.org/docs/cve-2020-8617