`libparsec_crypto` does not check for weak order point of curve 25519_CVE-2025-62514

{
    "lastseen": "",
    "description": "Parsec is a cloud-based application for cryptographically secure file sharing. In versions on the 3.x branch prior to 3.6.0, `libparsec_crypto`, a component of the Parsec application, does not check for weak order point of Curve25519 when compiled with its RustCrypto backend. In practice this means an attacker in a man-in-the-middle position would be able to provide weak order points to both parties in the Diffie-Hellman exchange, resulting in a high probability to for both parties to obtain the same shared key (hence leading to a successful SAS code exchange, misleading both parties into thinking no MITM has occurred) which is also known by the attacker. Note only Parsec web is impacted (as Parsec desktop uses `libparsec_crypto` with the libsodium backend). Version 3.6.0 of Parsec patches the issue.",
    "published": "2026-01-29T15:46:50.922Z",
    "modified": "2026-01-29T15:46:50.922Z",
    "type": "cve",
    "title": "`libparsec_crypto` does not check for weak order point of curve 25519",
    "source": "GitHub_M",
    "references": "https://github.com/Scille/parsec-cloud/security/advisories/GHSA-hrc9-gm58-pgj9\nhttps://github.com/Scille/parsec-cloud/commit/197bb6387b49fec872b5e4a04dcdb82b3d2995b2\nhttps://github.com/Scille/parsec-cloud/blob/e7c5cdbc4234f606ccf3ab2be7e9edc22db16feb/libparsec/crates/crypto/src/rustcrypto/private.rs#L136-L138\nhttps://github.com/dalek-cryptography/curve25519-dalek/blob/8c53a8f10b146a2fd65069437e3576e49b390e7a/curve25519-dalek/src/montgomery.rs#L132-L146\nhttps://github.com/dalek-cryptography/curve25519-dalek/blob/8c53a8f10b146a2fd65069437e3576e49b390e7a/x25519-dalek/src/x25519.rs#L364-L366",
    "id": "CVE-2025-62514",
    "bulletinFamily": "",
    "cwe": [
        "CWE-327",
        "CWE-1240"
    ],
    "cvelist": null,
    "sourceData": "Scille parsec-cloud >= 3.0.0-alpha, < 3.6.0",
    "sourceHref": "",
    "cvss": {
        "score": 8.3,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L",
        "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": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "parsec-cloud",
    "version": ">= 3.0.0-alpha, < 3.6.0",
    "vendor": "Scille",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}