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FreeBSD: VID-5B5CF6E5-5B51-11EB-95AC-7F9491278677 (CVE-2020-25681): dnsmasq -- DNS cache poisoning, and DNSSEC buffer overflow, vulnerabilities

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FreeBSD: VID-5B5CF6E5-5B51-11EB-95AC-7F9491278677 (CVE-2020-25681): dnsmasq -- DNS cache poisoning, and DNSSEC buffer overflow, vulnerabilities

Severity
8
CVSS
(AV:N/AC:M/Au:N/C:P/I:P/A:C)
Published
09/16/2020
Created
01/22/2021
Added
01/21/2021
Modified
03/08/2021

Description

A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in the way RRSets are sorted before validating with DNSSEC data. An attacker on the network, who can forge DNS replies such as that they are accepted as valid, could use this flaw to cause a buffer overflow with arbitrary data in a heap memory segment, possibly executing code on the machine. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Solution(s)

  • freebsd-upgrade-package-dnsmasq
  • freebsd-upgrade-package-dnsmasq-devel

References

  • CVE-2020-25681
  • USN-4698-1

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