NASA ION-DTN BPv7 4.1.3s Uncontrolled Memory Allocation that leads to Denial-of-Service_CVE-2025-61910

{
    "lastseen": "",
    "description": "The NASA\u2019s Interplanetary Overlay Network (ION) is an implementation of Delay/Disruption Tolerant Networking (DTN). A BPv7 bundle with a malformed extension block causes uncontrolled memory allocation inside ION-DTN 4.1.3s, leading to receiver thread termination and a Denial-of-Service (DoS). The triggering bundle contains an extension block starting at `0x85070201005bbb0e20b4ea001a000927c0...`. The first byte in the extension block (0x85) indicates a CBOR array of five elements of which the first four are numbers (0x07, 0x02, 0x01, 0x00) but the fifth element is a byte string of length 27 (`0x5bbb0e20b4ea001a000927c0...`). The vulnerability seems to be due to processing the fifth element of the array (i.e., the byte string) as replacing it with a number makes the vulnerability no longer be triggered. While parsing this extension block, ION obtains a very large block length, which in the code in `bei.c`:764) seems to be passed from `blockLength` which is an unsigned int, to a 32 bit signed integer `blkSize`. The unsigned to signed conversion causes `blkSize` to hold the value of -369092043, which is then converted into a 64-bit unsigned value inside `MTAKE(blkSize)`, resulting in an attempt to allocate an unrealistic amount of memory, causing the error. As of time of publication, no known patched versions of BPv7 exist.",
    "published": "2025-10-07T19:31:33.358Z",
    "modified": "2025-10-07T19:57:34.531Z",
    "type": "cve",
    "title": "NASA ION-DTN BPv7 4.1.3s Uncontrolled Memory Allocation that leads to Denial-of-Service",
    "source": "GitHub_M",
    "references": "https://github.com/nasa-jpl/ION-DTN/security/advisories/GHSA-xm96-38vj-h28h\nhttps://github.com/nasa-jpl/ION-DTN/blob/ion-open-source-4.1.3s/bpv7/library/bei.c#L758-L769",
    "id": "CVE-2025-61910",
    "bulletinFamily": "",
    "cwe": [
        "CWE-789"
    ],
    "cvelist": null,
    "sourceData": "nasa-jpl ION-DTN = 4.1.3s",
    "sourceHref": "",
    "cvss": {
        "score": 7.5,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
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            "confidentialityImpact": "",
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            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "ION-DTN",
    "version": "= 4.1.3s",
    "vendor": "nasa-jpl",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}