CVE-2017-5428: Mozilla Firefox ESR vulnerability

CVE-2017-5428: An integer overflow in "createImageBitmap()" was reported through the Pwn2Own contest.

An integer overflow in "createImageBitmap()" was reported through the Pwn2Own contest. The fix for this vulnerability disables the experimental extensions to the "createImageBitmap" API. This function runs in the content sandbox, requiring a second vulnerability to compromise a user's computer. This vulnerability affects Firefox ESR < 52.0.1 and Firefox < 52.0.1.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 5, 2024, 15:04 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2017-5428 is an old Mozilla Firefox integer overflow in the experimental createImageBitmap() API. Mozilla fixed it in Firefox and Firefox ESR 52.0.1 by disabling the affected experimental API extensions. On its own, the bug ran inside the content sandbox, so full device compromise would require another vulnerability. Exposure is mainly legacy endpoints, virtual desktops, or packaged Linux systems still running Firefox or Firefox ESR before 52.0.1. Current managed browsers should be unaffected if updates have been consistently applied. Treat this as a legacy browser hygiene issue unless vulnerable Firefox versions remain in production. Prioritize remediation where users browse untrusted content or where old managed images still exist. Mitigation focus: Upgrade Firefox and Firefox ESR to 52.0.1 or later.; Apply Mozilla or Linux vendor security updates for managed packages.; Inventory endpoints for unsupported Firefox and Firefox ESR versions..

Prepared: Jun 7, 2026, 06:44 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jun 11, 2018, 21:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://bugzilla.mozilla.org/show_bug.cgi?id=1348168CVE reference · x_refsource_CONFIRM
https://www.mozilla.org/security/advisories/mfsa2017-08/CVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

MozillaFirefox ESRunspecifiedListed

MozillaFirefoxunspecifiedListed

Weakness

CWE details

No CWE listed

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