Description
OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.1.0 to before 3.2.7, 3.3.9, and 3.4.9, internal_exr_undo_piz() advances the working wavelet pointer with signed 32-bit arithmetic. Because nx, ny, and wcount are int, a crafted EXR file can make this product overflow and wrap. The next channel then decodes from an incorrect address. The wavelet decode path operates in place, so this yields both out-of-bounds reads and out-of-bounds writes. 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
None
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>= 3.1.0, <= 3.1.13 – >= 3.1.0, <= 3.1.13
- 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-588r-cr5c-w6hf
- 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