Vulnerability Name: | CVE-2020-12667 (CCN-182175) | ||||||||||||
Assigned: | 2020-05-19 | ||||||||||||
Published: | 2020-05-19 | ||||||||||||
Updated: | 2020-05-28 | ||||||||||||
Summary: | 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 v3 Severity: | 7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) 6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
4.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C)
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CVSS v2 Severity: | 5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
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Vulnerability Type: | CWE-400 | ||||||||||||
Vulnerability Consequences: | Denial of Service | ||||||||||||
References: | Source: MITRE Type: CNA CVE-2020-12667 Source: MISC Type: Technical Description, Third Party Advisory http://cyber-security-group.cs.tau.ac.il/# Source: MLIST Type: Mailing List, Third Party Advisory [oss-security] 20200519 [CVE-2020-12667] Knot Resolver 5.1.1 NXNSAttack mitigation Source: MISC Type: Technical Description, Vendor Advisory https://en.blog.nic.cz/2020/05/19/nxnsattack-upgrade-resolvers-to-stop-new-kind-of-random-subdomain-attack/ Source: XF Type: UNKNOWN knotresolver-cve202012667-dos(182175) Source: FEDORA Type: UNKNOWN FEDORA-2020-bf68101ad3 Source: CCN Type: oss-sec Mailing List, Tue, 19 May 2020 12:40:00 +0200 [CVE-2020-12667] Knot Resolver 5.1.1 NXNSAttack mitigation Source: CCN Type: Knot Resolver Web site Knot Resolver Source: CONFIRM Type: Release Notes, Vendor Advisory https://www.knot-resolver.cz/2020-05-19-knot-resolver-5.1.1.html Source: CCN Type: WhiteSource Vulnerability Database CVE-2020-12667 | ||||||||||||
Vulnerable Configuration: | Configuration 1:![]() | ||||||||||||
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