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Outside In TechnologyApplication · Oracle

CVE-2021-2423

HIGH · 7.5 CVSS v3.1 Published 2021-07-21
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
84/100
Remediation priority · High
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Vulnerability in the Oracle Outside In Technology product of Oracle Fusion Middleware (component: Outside In Filters). The supported version that is affected is 8.5.5. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Outside In Technology. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Outside In Technology. Note: Outside In Technology is a suite of software development kits (SDKs). The protocol and CVSS Base Score depend on the software that uses Outside In Technology. The CVSS score assumes that the software passes data received over a network directly to Outside In Technology, but if data is not received over a network the CVSS score may be lower. CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

A denial-of-service vulnerability in Oracle Outside In Technology 8.5.5's Filters component allows unauthenticated remote attackers via HTTP to crash or hang the affected system. The vulnerability has low attack complexity requiring no authentication or user interaction.

MitigationApply Oracle security patches for Outside In Technology 8.5.5 when released; until then, restrict network access to systems using this component and implement rate limiting or Web Application Firewall protections.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Outside In TechnologyApplication
Affected:= 8.5.5

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify Oracle Outside In Technology installation
    Search the system for Oracle Outside In Technology installation directories or check installed software listings for 'Oracle Outside In' or 'OIT' version 8.5.5
    Affected if Oracle Outside In Technology version 8.5.5 is found on the system
  2. Confirm Filters component presence
    Examine the Oracle Outside In Technology installation for the 'Filters' directory or component, typically found under the main OIT installation path in a 'filters' or 'filt' subdirectory
    Affected if The Filters component directory exists within the OIT 8.5.5 installation
  3. Check HTTP exposure of OIT Filters
    Review network configuration, firewall rules, and web server configurations to determine if the system running OIT Filters is accessible via HTTP/HTTPS from untrusted networks
    Affected if The OIT Filters component is reachable via HTTP from remote, unauthenticated network sources
  4. Identify applications using OIT Filters
    Audit running applications and services that process document formats (such as document management systems, email gateways, or content management systems) and check if they utilize Oracle Outside In Technology for document processing
    Affected if Applications that process external documents are running and depend on OIT 8.5.5 Filters

The environment is affected if Oracle Outside In Technology version 8.5.5 with its Filters component is installed and accessible via HTTP from untrusted networks.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply Oracle security patches for Outside In Technology 8.5.5 when released; until then, restrict network access to systems using this component and implement rate limiting or Web Application Firewall protections.

Fix this in Outside In Technology Scoped from the published advisory
  • Consultation8.0 h
  • Implementation16.0 h
  • Testing8.0 h
  • Review / QA4.0 h
36.0 hours of engineering $6,400
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2021-2423 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
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