CVE-2020-12667 — Uncontrolled Resource Consumption in Knot Resolver

CWE-400 — Uncontrolled Resource Consumption8 documents6 sources
Severity
7.5HIGHNVD
EPSS
1.0%
top 22.71%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Cz.nic Knot-resolverNIC Knot Resolver
Timeline
PublishedMay 19
Latest updateMay 24

Description

Knot Resolver before 5.1.1 allows traffic amplification via a crafted DNS answer from an attacker-controlled server, aka an "NXNSAttack" issue. This is triggered by random subdomains in the NSDNAME in NS records.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages2 packages

▶NVDnic/knot_resolver< 5.1.1
▶Debiancz.nic/knot-resolver< 5.1.1-0.1+3

🔴Vulnerability Details

3
GHSA
GHSA-2gpj-6wgq-8636: Knot Resolver before 5↗2022-05-24
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OSV
CVE-2020-12667: Knot Resolver before 5↗2020-05-19
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CVEList
CVE-2020-12667: Knot Resolver before 5↗2020-05-19
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📋Vendor Advisories

1
Debian
CVE-2020-12667: knot-resolver - Knot Resolver before 5.1.1 allows traffic amplification via a crafted DNS answer...↗2020
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💬Community

3
Bugzilla
CVE-2020-12667 knot-resolver: Traffic amplification triggered by random subdomains in the NSDNAME in NS records [fedora-all]↗2020-05-25
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Bugzilla
CVE-2020-12667 knot-resolver: Traffic amplification triggered by random subdomains in the NSDNAME in NS records [epel-7]↗2020-05-25
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Bugzilla
CVE-2020-12667 knot-resolver: Traffic amplification triggered by random subdomains in the NSDNAME in NS records↗2020-05-25
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CVE-2020-12667 — Uncontrolled Resource Consumption | cvebase