vulnerability / NVI-00016181 / Revision 1
ExifReader HEIC/AVIF ISO-BMFF parser throws uncaught RangeError on truncated boxes
GitHub lists this reviewed advisory for exifreader. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
5.3 medium
GitHub source severity; exploitability and local consequence require separate evidence.
As of · GitHub Advisory Database
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
exifreader
source listed<= 4.40.0
## Summary ExifReader 4.40.0 can throw an uncaught `RangeError: Offset is outside the bounds of the DataView` while parsing crafted HEIC/AVIF files. The file only needs a valid leading `ftyp` box with a HEIC/AVIF major brand followed by a malformed ISO-BMFF box, such as an empty 8-byte `free` box or a truncated extended-size box. This is reachable through the public `ExifReader.load()` API for in-memory buffers and through the async file/URL loaders when an application parses attacker-supplied images. In applications that do not wrap every parse in a defensive try/catch, a single uploaded or fetched image can abort the request/worker and cause a denial of service. Credit requested: Yaohui Wang. ## Affected version tested - npm package: `exifreader` - Version: `4.40.0` - Repository commit tested: `8cb0261a26b7d986955fe0a6780f076dcb7902e7` ## Root cause The ISO-BMFF parser assumes that every top-level box with at least an 8-byte header also has enough bytes for the fields required by its parsed form. In `src/image-header-iso-bmff.js`: - `findMetaBox()` calls `parseBox(dataView, offset)` while only checking that `offset + 8 <= dataView.byteLength`. - `parseBox()` calls `getBox
03 / Response
What to do next
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
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04 / Limits
What this report cannot establish
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05 / Provenance
Sources you can inspect
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- GHSA-g77h-45rf-hcx4 ↗
GitHub Advisory Database · vendor advisory
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Public revision history
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- Revision 1 ·
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