rhsa-2025:8340
Vulnerability from csaf_redhat
Published
2025-06-02 02:14
Modified
2025-07-29 22:49
Summary
Red Hat Security Advisory: varnish:6 security update
Notes
Topic
An update for the varnish:6 module is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions, and Red Hat Enterprise Linux 8.4 Telecommunications Update Service.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details
Varnish Cache is a high-performance HTTP accelerator. It stores web pages in memory so web servers don't have to create the same web page over and over again, giving the website a significant speed up.
Security Fix(es):
* varnish: request smuggling attacks (CVE-2025-47905)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use
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.
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"name": "Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)"
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"ids": [
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"text": "2364235"
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"category": "description",
"text": "A vulnerability was found in Varnish Cache. This vulnerability may allow request smuggling attacks, where a malicious actor can craft seemingly legitimate HTTP requests. This issue could result in an unspecified system caching incorrect content that can expose confidential information.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "varnish: request smuggling attacks",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This vulnerability is rated as an IMPORTANT severity because this is a client-side desync vulnerability in Varnish handling a chunked transfer encoding, where it mishandles CRLF delimiters, allows attackers to smuggle additional HTTP/1 requests, this flaw allows attacker to unauthorized access of sensitive information and data alteration.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s 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-2025-47905"
},
{
"category": "external",
"summary": "RHBZ#2364235",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2364235"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2025-47905",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-47905"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-47905",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-47905"
}
],
"release_date": "2025-05-13T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2025-06-02T02:14:50+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"url": "https://access.redhat.com/errata/RHSA-2025:8340"
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}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
"version": "3.1"
},
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"AppStream-8.4.0.Z.TUS:varnish:6:8040020250522134003:522a0ee4:varnish-modules-0:0.15.0-5.module+el8.3.0+6843+b3b42fcc.src",
"AppStream-8.4.0.Z.TUS:varnish:6:8040020250522134003:522a0ee4:varnish-modules-0:0.15.0-5.module+el8.3.0+6843+b3b42fcc.x86_64",
"AppStream-8.4.0.Z.TUS:varnish:6:8040020250522134003:522a0ee4:varnish-modules-debuginfo-0:0.15.0-5.module+el8.3.0+6843+b3b42fcc.x86_64",
"AppStream-8.4.0.Z.TUS:varnish:6:8040020250522134003:522a0ee4:varnish-modules-debugsource-0:0.15.0-5.module+el8.3.0+6843+b3b42fcc.x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "varnish: request smuggling attacks"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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