Low

Stack-based buffer overflow in Oracle Outside In vsacs.dll (Microsoft Access 1.x parser)

IdentifiersCVE-2013-5791CWE-121

CVE-2013-5791 is an issue in the Oracle Outside In Technology component of Oracle Fusion Middleware (8.4.0 and 8.4.1) in the Outside In Filters. Oracle’s October 2013 CPU describes it as an unspecified vulnerability allowing context-dependent attackers to affect availability via unknown vectors related to Outside In Filters. A third-party claim (not confirmed by Oracle) asserts the root cause is a stack-based buffer overflow in the Microsoft Access 1.x parser within vsacs.dll (prior to 8.4.0.108 and 8.4.1.52), triggerable via a crafted file containing an overly long field/column name, potentially leading to arbitrary code execution.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Per Oracle’s CPU description, exploitation can affect availability (DoS). If the third-party claim is accurate, successful exploitation could also enable arbitrary code execution in the context of the process invoking the Outside In filter/parser when handling a crafted Microsoft Access 1.x document.

Mitigation

If you can’t patch tonight, do this now.

Reduce exposure to untrusted content processed by Outside In Filters: restrict or disable parsing/filtering of Microsoft Access (and other) document types where not required; isolate document parsing in a sandboxed/low-privilege service account or separate host/container; and limit attack surface by controlling ingress paths that deliver documents to the filter (e.g., email gateways, upload portals, content management ingestion). These are compensating controls and do not replace patching.

Remediation

Patch, then assume compromise.

Apply Oracle’s October 2013 Critical Patch Update for the affected Oracle Fusion Middleware/Outside In Technology versions. Ensure the Outside In components are updated such that vsacs.dll is at least 8.4.0.108 (for 8.4.0) or 8.4.1.52 (for 8.4.1), per the third-party version claims referenced in the CVE text. Where the product/version is unsupported, upgrade to a supported release/patch set eligible for security fixes under Oracle’s support policy.

PUBLIC EXPLOITS

Exploits

No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.

VALID 0 / 1 TOTALView more in app

All candidate exploits were filtered out by Mallory's validation.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

Oracle CorporationFusion Middlewareapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

1 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.

1 SOURCESView more in app

No news coverage yet. Advisories and community discussion only.

What this page doesn’t show

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Exposure mapping

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Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity