GCVE-1988-2025-0004

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "Bioformats",
          "vendor": "unknown",
          "versions": [
            {
              "status": "affected",
              "version": "unknown"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Ron E"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Bio-Formats performs unsafe Java deserialization of attacker-controlled\nmemoization cache files (.bfmemo) during image processing. The\nloci.formats.Memoizer class automatically loads and deserializes memo files\nassociated with images without validation, integrity checks, or trust\nenforcement.\nAn attacker can exploit this behavior by supplying a crafted or corrupted\n.bfmemo file—either fully attacker-controlled or derived from a legitimate\nmemo file—causing Bio-Formats to deserialize untrusted data. This can lead\nto denial-of-service, logic manipulation, or remote code execution when\nsuitable gadget chains are present on the classpath.\n\n*Impact:*\nAn attacker can:\n* Trigger deserialization of untrusted data\n* Cause repeated parsing failures (denial-of-service)\n* Influence reader discovery and class loading\n* Potentially achieve remote code execution when suitable gadget chains\nexist\nThe vulnerability is reachable through standard image processing workflows\nand does not require non-default configuration.\n\n*Proof of Concept:*\nCorrupting a Legitimate Memo File\nThis PoC demonstrates exploitation by modifying a legitimately generated\n.bfmemo file, which closely mirrors a real-world attack scenario.\n\nStep 1 – Generate a Valid Memo File\n[Step 1/4] Creating valid TIFF image...\n[+] Created valid.tif\n\n[Step 2/4] Generating legitimate memo file...\n[+] Memo created at: ./root/bioformats/.valid.tif.bfmemo\n[+] Size: 34815 bytes\n\nStep 2 – Corrupt the Existing Memo File\n[Step 4/4] Corrupting memo file...\n[+] Corrupted memo (appended 400 garbage bytes)\n[+] Created symlink to memo file\n\nExample Output\n[*] Loading valid.tif with Memoizer...\n\njava.lang.ClassNotFoundException: loci.formats.in.URLReader\nat loci.formats.ClassList.parseLine(ClassList.java:196)\nat loci.formats.ClassList.parseFile(ClassList.java:258)\nat loci.formats.Memoizer.<init>(Memoizer.java:540)\n\njava.lang.ClassNotFoundException: loci.formats.in.SlideBook6Reader\njava.lang.ClassNotFoundException: loci.formats.in.ScreenReader\njava.lang.ClassNotFoundException: loci.formats.in.ZarrReader\njava.lang.ClassNotFoundException:\nch.epfl.biop.formats.in.ZeissQuickStartCZIReader\n_______________________________________________\nSent through the Full Disclosure mailing list\nhttps://nmap.org/mailman/listinfo/fulldisclosure\nWeb Archives & RSS: https://seclists.org/fulldisclosure/"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-08T07:57:41Z",
        "orgId": "4e2abfbf-4a2a-4b76-a4e0-d77c18ba156c",
        "shortName": "VULNARCHIVE"
      },
      "references": [
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://vuln.freearchive.org/archive/full-disclosure/2026/Jan/7"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://seclists.org/fulldisclosure/2026/Jan/7"
        },
        {
          "url": "https://nmap.org/mailman/listinfo/fulldisclosure"
        },
        {
          "url": "https://seclists.org/fulldisclosure/"
        }
      ],
      "source": {
        "defect": [
          "https://seclists.org/fulldisclosure/2026/Jan/7"
        ],
        "discovery": "EXTERNAL"
      },
      "title": "Bioformats v8.3.0 Untrusted Deserialization of Bio-Formats Memoizer Cache Files",
      "x_gcve": [
        {
          "recordType": "advisory",
          "relationships": [],
          "vulnId": "GCVE-1988-2025-0004",
          "x_vulnarchive": {
            "archiveUrl": "https://vuln.freearchive.org/archive/full-disclosure/2026/Jan/7",
            "automated": true,
            "contentSha256": "40ad0f53caf4e58126503be0ef0c34f8f029d0b6154ea0b259ea8c56420bf3ad",
            "evidenceScore": 7,
            "messageId": "",
            "originalUrl": "https://seclists.org/fulldisclosure/2026/Jan/7",
            "policy": "vulnarchive-1",
            "sourceFormat": "text/html",
            "sourcePublishedAt": "2025-12-30T03:59:51Z"
          }
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "4e2abfbf-4a2a-4b76-a4e0-d77c18ba156c",
    "assignerShortName": "VULNARCHIVE",
    "datePublished": "2026-09-08T07:57:41Z",
    "dateUpdated": "2026-09-08T07:57:41Z",
    "state": "PUBLISHED",
    "vulnId": "GCVE-1988-2025-0004"
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