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.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 3
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Openexr Openexr
cpe:2.3:a:openexr:openexr:*:*:*:*:*:*:*:*
|
3.1.0
|
3.2.7
|
|
Openexr Openexr
cpe:2.3:a:openexr:openexr:*:*:*:*:*:*:*:*
|
3.3.0
|
3.3.9
|
|
Openexr Openexr
cpe:2.3:a:openexr:openexr:*:*:*:*:*:*:*:*
|
3.4.0
|
3.4.9
|
References 4
https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.2.7
security-advisories@github.com
https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.3.9
security-advisories@github.com
https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.9
security-advisories@github.com
https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-5…
security-advisories@github.com