ImageSharp is a 2D graphics library. From 2.0.0 until 4.1.2, decoding an attacker-supplied 32-bit floating-point TIFF as Image<HalfVector4> and applying HistogramEqualization can produce a non-finite or out-of-range luminance in ColorNumerics.GetBT709Luminance. GrayscaleLevelsRowOperation.Invoke uses the resulting value as an unchecked histogram offset, causing an unsafe out-of-range access and process termination. Adaptive Histogram Equalization and AutoLevel are not affected by this report.
This issue is fixed in version 4.1.2.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
References 4
https://github.com/SixLabors/ImageSharp/commit/c4c4bf292298c026df470db1a17ff826…
security-advisories@github.com
https://github.com/SixLabors/ImageSharp/pull/3187
security-advisories@github.com
https://github.com/SixLabors/ImageSharp/releases/tag/v4.1.2
security-advisories@github.com
https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-j3p4-wp97-rph4
security-advisories@github.com