CVE - CVE-2020-25686

CVE-ID
CVE-2020-25686	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
DEBIAN:DSA-4844 URL:https://www.debian.org/security/2021/dsa-4844 FEDORA:FEDORA-2021-2e4c3d5a9d URL:https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QGB7HL3OWHTLEPSMLDGOMXQKG3KM2QME/ FEDORA:FEDORA-2021-84440e87ba URL:https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WYW3IR6APUSKOYKL5FT3ACTIHWHGQY32/ GENTOO:GLSA-202101-17 URL:https://security.gentoo.org/glsa/202101-17 MISC:https://www.arista.com/en/support/advisories-notices/security-advisories/12135-security-advisory-61 MISC:https://bugzilla.redhat.com/show_bug.cgi?id=1890125 URL:https://bugzilla.redhat.com/show_bug.cgi?id=1890125 MISC:https://www.jsof-tech.com/disclosures/dnspooq/ URL:https://www.jsof-tech.com/disclosures/dnspooq/
Assigning CNA
Red Hat, Inc.
Date Record Created
20200916	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20200916)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
This is an record on the CVE List, which provides common identifiers for publicly known cybersecurity vulnerabilities.
Search CVE Using Keywords: You can also search by reference using the CVE Reference Maps.
For More Information: CVE Request Web Form (select "Other" from dropdown)