Rapid7 Vulnerability & Exploit Database

Oracle Solaris 11: CVE-2020-25686 (11.4 SRU 31.88.5)

Back to Search

Oracle Solaris 11: CVE-2020-25686 (11.4 SRU 31.88.5)

Severity
4
CVSS
(AV:N/AC:M/Au:N/C:N/I:P/A:N)
Published
01/20/2021
Created
03/18/2021
Added
03/17/2021
Modified
11/17/2021

Description

A flaw was found in dnsmasq before version 2.83. When receiving a query, dnsmasq does not check for an existing pending request for the same name and forwards a new request. By default, a maximum of 150 pending queries can be sent to upstream servers, so there can be at most 150 queries for the same name. This flaw allows an off-path attacker on the network to substantially reduce the number of attempts that it would have to perform to forge a reply and have it accepted by dnsmasq. This issue is mentioned in the "Birthday Attacks" section of RFC5452. If chained with CVE-2020-25684, the attack complexity of a successful attack is reduced. The highest threat from this vulnerability is to data integrity.

Solution(s)

  • oracle-solaris-11-4-upgrade-value-service-network-dnsmasq-2-84-11-4-31-0-1-88-1

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;