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Out-of-Bounds Read Information Disclosure in Adobe Acrobat and Reader 3D PDF Rendering

IdentifiersCVE-2019-7121CWE-125· Out-of-bounds Read

CVE-2019-7121 is an out-of-bounds read vulnerability in Adobe Acrobat and Reader affecting versions 2019.010.20098 and earlier, 2017.011.30127 and earlier, and 2015.006.30482 and earlier. The flaw is in the 3D PDF rendering path, specifically Adobe’s 3D/U3D handling components including 2d.x3d and rt3d-related code used when processing ECMA-363 Universal 3D File Format content. The vulnerable condition can be triggered by a crafted PDF containing 3D content that references malformed external texture images. Reported analysis places the fault in the sandboxed process, with the crash observed near 2d!png_set_filter_heuristics during image parsing/loading. Successful exploitation results in an out-of-bounds memory read and can disclose process memory.

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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.

Successful exploitation can lead to information disclosure from the sandboxed Adobe Reader/Acrobat process in the context of the logged-on user. The issue is described as an out-of-bounds read rather than code execution; the primary security consequence is exposure of memory contents that may aid further exploitation or reveal sensitive data handled by the process.

Mitigation

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

If immediate patching is not possible, reduce exposure by disabling or restricting 3D content rendering in PDF workflows, especially in environments that exchange 3D PDFs such as CAD-related sectors. Avoid opening untrusted PDFs containing embedded 3D/U3D content or external texture references. Use Adobe’s enterprise update tooling to accelerate deployment of the vendor fix.

Remediation

Patch, then assume compromise.

Upgrade Adobe Acrobat/Reader to a fixed release. Adobe advisory APSB19-17 lists the patched versions as Acrobat/Reader DC Continuous 2019.010.20099, Acrobat/Reader 2017 Classic 2017.011.30138, and Acrobat/Reader DC Classic 2015.006.30493 for Windows and macOS. Apply vendor updates through the built-in updater or enterprise software deployment mechanisms.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

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VendorProductType
AdobeAcrobat Dcapplication
AdobeAcrobat Reader Dcapplication

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What this page doesn’t show

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Threat actor evidence

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Associated malware

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Detection signatures

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Social activity

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