Description
OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.2.0 to before 3.2.7, 3.3.9, and 3.4.9, the DWA lossy decoder constructs temporary per-component block pointers using signed 32-bit arithmetic. For a large enough width, the calculation overflows and later decoder stores operate on a wrapped pointer outside the allocated rowBlock backing store. This vulnerability is fixed in 3.2.7, 3.3.9, and 3.4.9.
CVSS breakdown
CVSS 4.0
Attack Vector
Local
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
Active
Confidentiality (Vulnerable System)
High
Integrity (Vulnerable System)
High
Availability (Vulnerable System)
High
Confidentiality (Subsequent System)
None
Integrity (Subsequent System)
None
Availability (Subsequent System)
None
Affected products
- AcademySoftwareFoundation / openexr>= 3.2.0, < 3.2.7 – >= 3.2.0, < 3.2.7
- AcademySoftwareFoundation / openexr>= 3.3.0, < 3.3.9 – >= 3.3.0, < 3.3.9
- AcademySoftwareFoundation / openexr>= 3.4.0, < 3.4.9 – >= 3.4.0, < 3.4.9
References
- VENDOR_ADVISORYhttps://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-p8xc-w3q4-h64x
- PATCHhttps://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.2.7
- PATCHhttps://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.3.9
- PATCHhttps://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.9