CVE-2017-3736

There is a carry propagating bug in the x86_64 Montgomery squaring procedure in OpenSSL before 1.0.2m and 1.1.0 before 1.1.0g. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen.

References

Affected packages

Git / github.com/openssl/openssl

Affected ranges

Type

GIT

Repo

https://github.com/openssl/openssl

Events

Introduced

e818b74be2170fbe957a07b0da4401c2b694b3b8

Fixed

e818b74be2170fbe957a07b0da4401c2b694b3b8

Introduced

7ea5bd2b52d0e81eaef3d109b3b12545306f201c

Fixed

7ea5bd2b52d0e81eaef3d109b3b12545306f201c

Fixed

4443cf7aa0099e5ce615c18cee249fff77fb0871

Database specific

{
    "versions": [
        {
            "introduced": "1.0.2"
        },
        {
            "fixed": "1.0.2m"
        },
        {
            "introduced": "1.1.0"
        },
        {
            "fixed": "1.1.0g"
        }
    ]
}

Affected versions

Other

OpenSSL_1_0_2u

OpenSSL_1_1_0l

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-3736.json"

vanir_signatures

[
    {
        "id": "CVE-2017-3736-a8883bd8",
        "signature_type": "Line",
        "digest": {
            "line_hashes": [
                "227788886913935889032703558012047812302",
                "50491541398146363716796660912620610979",
                "269421547081420290782835078680106598455",
                "1907100557939212133144652077112450142",
                "5242489482972689247408035301976916379",
                "293500484184004759882319173711457008915",
                "22352102879530286438426240576046215259",
                "227623751601783881855048171227667533607"
            ],
            "threshold": 0.9
        },
        "target": {
            "file": "include/openssl/opensslv.h"
        },
        "source": "https://github.com/openssl/openssl/commit/7ea5bd2b52d0e81eaef3d109b3b12545306f201c",
        "signature_version": "v1",
        "deprecated": false
    },
    {
        "id": "CVE-2017-3736-e051451f",
        "signature_type": "Line",
        "digest": {
            "line_hashes": [
                "251633914150035957322733061977107206211",
                "338514574181828579838011565939158652696",
                "76638288692106140328510055542557597351",
                "142922657400765574308962710386922248045",
                "71649992455794854055653842592139575350",
                "65527166711110472566013424527579064967",
                "253196866009476977787139000804413898733",
                "172177136897997206866313011107384691461"
            ],
            "threshold": 0.9
        },
        "target": {
            "file": "crypto/opensslv.h"
        },
        "source": "https://github.com/openssl/openssl/commit/e818b74be2170fbe957a07b0da4401c2b694b3b8",
        "signature_version": "v1",
        "deprecated": false
    }
]