cve-2026-45673
MEDIUM CVSS 6.8 csaf_redhat
Description
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
Timeline
- Published
- 2026-06-12 14:16 UTC
- Last Modified
- 2026-08-04
CVSS Details
CVSS details not available.
Affected Products
No product information available.
Weaknesses (CWE)
References
No references available.
Linked Vulnerabilities
No linked vulnerabilities found.
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"title": "netty-resolver-dns: Netty DNS resolver: DNS Cache Poisoning via predictable transaction IDs",
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"text": "A flaw was found in Netty's DNS resolver component. This vulnerability arises from the use of a predictable pseudo-random number generator (PRNG) for DNS transaction IDs and a static User Datagram Protocol (UDP) source port. This combination significantly reduces the randomness of DNS queries, making it easier for a remote attacker to perform DNS Cache Poisoning, also known as a Kaminsky attack. Successful exploitation could allow an attacker to redirect network traffic to malicious servers.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "netty-resolver-dns: Netty DNS resolver: DNS Cache Poisoning via predictable transaction IDs",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Moderate: This flaw in Netty's DNS resolver could allow a remote attacker to perform DNS cache poisoning. The vulnerability stems from the use of a predictable pseudo-random number generator for DNS transaction IDs and a static UDP source port, which reduces the entropy of DNS queries. This makes it easier for an attacker to redirect network traffic to malicious servers, potentially leading to traffic interception or Man-in-the-Middle attacks for applications using the default Netty DNS resolver in Red Hat products.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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]
},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-45673"
},
{
"category": "external",
"summary": "RHBZ#2488386",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2488386"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-45673",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-45673"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-45673",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45673"
},
{
"category": "external",
"summary": "https://github.com/netty/netty/releases/tag/netty-4.1.135.Final",
"url": "https://github.com/netty/netty/releases/tag/netty-4.1.135.Final"
},
{
"category": "external",
"summary": "https://github.com/netty/netty/releases/tag/netty-4.2.15.Final",
"url": "https://github.com/netty/netty/releases/tag/netty-4.2.15.Final"
},
{
"category": "external",
"summary": "https://github.com/netty/netty/security/advisories/GHSA-xmv7-r254-6q78",
"url": "https://github.com/netty/netty/security/advisories/GHSA-xmv7-r254-6q78"
}
],
"release_date": "2026-06-12T14:16:03.968000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-08-04T13:59:30+00:00",
"details": "Before applying the update, make sure all previously released errata relevant to your system have been applied. Also, back up your existing installation, including all applications, configuration files, databases and database settings. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258",
"product_ids": [
"Red Hat JBoss Enterprise Application Platform 8.1"
],
"url": "https://access.redhat.com/errata/RHSA-2026:50085"
},
{
"category": "vendor_fix",
"date": "2026-06-17T16:18:16+00:00",
"details": "Before applying this update, make sure all previously released errata\nrelevant to your system have been applied.\n\nFor details on how to apply this update, refer to:\n\nhttps://access.redhat.com/articles/11258",
"product_ids": [
"Red Hat build of Quarkus 3.27.4.SP1"
],
"url": "https://access.redhat.com/errata/RHSA-2026:26018"
},
{
"category": "vendor_fix",
"date": "2026-06-17T15:45:05+00:00",
"details": "Before applying this update, make sure all previously released errata\nrelevant to your system have been applied.\n\nFor details on how to apply this update, refer to:\n\nhttps://access.redhat.com/articles/11258",
"product_ids": [
"Red Hat build of Quarkus 3.33.2.SP1"
],
"url": "https://access.redhat.com/errata/RHSA-2026:26017"
},
{
"category": "workaround",
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},
{
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}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.8,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Moderate",
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]
}
],
"title": "netty-resolver-dns: Netty DNS resolver: DNS Cache Poisoning via predictable transaction IDs"
}
]
}