CVE-2020-25684Not scoredCWE-358

CVE-2020-25684: Thekelleys dnsmasq vulnerability

Thekelleys · dnsmasq

Fixed in 2.83 · Affected: Thekelleys dnsmasq before 2.83 · Exploitation: possible (1 to 10%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

4.2%probability of exploitation in the next 30 days

91st percentile

050100

Higher than 91% of scored CVEs

Not scored yet. The CVE record carries no CVSS score.

DescriptionCVE.org

A flaw was found in dnsmasq before version 2.83. When getting a reply from a forwarded query, dnsmasq checks in the forward.c:reply_query() if the reply destination address/port is used by the pending forwarded queries. However, it does not use the address/port to retrieve the exact forwarded query, substantially reducing the number of attempts an attacker on the network would have to perform to forge a reply and get it accepted by dnsmasq. This issue contrasts with RFC5452, which specifies a query's attributes that all must be used to match a reply. This flaw allows an attacker to perform a DNS Cache Poisoning attack. If chained with CVE-2020-25685 or CVE-2020-25686, the attack complexity of a successful attack is reduced. The highest threat from this vulnerability is to data integrity.

Affected products1

From the CVE record. A product or version that is not listed is unknown, not unaffected.

dnsmasqdnsmasq 2.83

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Exploitation: Possible (1 to 10%). EPSS between 1% and 10%.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Improperly Implemented Security Check for Standard · Cryptography
Vendor: Thekelleys
Published: January 2021
Band: Possible (1 to 10%), January 2021

CoverageNo articles yet

No CyberSIXT article names CVE-2020-25684 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.