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CVE detail

CVE-2020-25683

A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in dnsmasq when DNSSEC is enabled and before it validates the received DNS entries. A remote attacker, who can create valid DNS replies, could use this flaw to cause an overflow in a heap-allocated memory. This flaw is caused by the lack of length checks in rfc1035.c:extract_name(), which could be abused to make the code execute memcpy() with a negative size in get_rdata() and cause a crash in dnsmasq, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

CVSS 5.9 · MediumBuzz score 25.4

Buzz score

Why this CVE is surfacing

Buzz score total 25.4

This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.

Buzz score components · mention 13.9 · diversity 11.5 · KEV 0.0 · OTX 0.0 · PoC 0.0
Mention score
13.9
3 evidence mentions in the snapshot
Diversity score
11.5
3 sources across 2 categories
KEV score
0.0
No KEV entry observed
OTX score
0.0
0 OTX pulses
PoC score
0.0
0 repos · best confidence N/A
Best PoC traction
0
Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions
0
within the 30d window
Peak daily
0
highest bucket

Evidence

Source links by recency

Newest mentions first
3 source links · newest first
  • Overview of dnsmasq Vulnerabilities: The Dangers of DNS Cache PoisoningUnit42

    We review vulnerabilities in dnsmasq, an open source DNS resolver, deep dive into DNS cache poisoning and describe effects on cloud products.

    vendorunit42.paloaltonetworks.comMar 8, 2021, 5:00 PM
  • DNSpooq bugs haunt dnsmasqMalwarebytes Labs

    The research team at JSOF found seven vulnerabilities in dnsmasq and have dubbed them DNSpooq, collectively. Now, some of you may…

    newswww.malwarebytes.comJan 20, 2021, 5:00 PM
  • DNSpooq Flaws Expose Millions of Devices to DNS Cache Poisoning, Other AttacksSecurityWeek

    Researchers at Israel-based boutique cybersecurity consultancy JSOF this week disclosed the details of seven potentially serious DNS-related vulnerabilities that could expose millions of devices to various types of attacks.

    newswww.securityweek.comJan 20, 2021, 11:37 AM

Exploit code

Public exploit repository references

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0 repository references · best confidence N/A · max 0 stars
No public PoC repositories have been matched yet.

Related records

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