CVE-2018-16253

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Source
https://cve.org/CVERecord?id=CVE-2018-16253
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-16253.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2018-16253
Published
2018-11-07T20:29:00.667Z
Modified
2026-04-11T12:27:49.872989Z
Severity
  • 5.9 (Medium) CVSS_V3 - CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
Summary
[none]
Details

In sig_verify() in x509.c in axTLS version 2.1.3 and before, the PKCS#1 v1.5 signature verification does not properly verify the ASN.1 metadata. Consequently, a remote attacker can forge signatures when small public exponents are being used, which could lead to impersonation through fake X.509 certificates. This is an even more permissive variant of CVE-2006-4790 and CVE-2014-1568.

References

Affected packages

Git / github.com/igrr/axtls-8266

Affected ranges

Type
GIT
Repo
https://github.com/igrr/axtls-8266
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
5efe2947ab45e81d84b5f707c51d1c64be52f36c
Type
GIT
Repo
https://github.com/igrr/axtls-8266
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
5efe2947ab45e81d84b5f707c51d1c64be52f36c

Database specific

unresolved_ranges 
[
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "2.1.3"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "fake"
            }
        ]
    }
]
vanir_signatures 
[
    {
        "deprecated": false,
        "signature_version": "v1",
        "id": "CVE-2018-16253-3090bf7e",
        "digest": {
            "line_hashes": [
                "108661851987972133158347054716703460683",
                "14896255174603763604770523751983435879",
                "120240012124074572250753975559093603406",
                "45010925886924942386907557492617314856",
                "115305286616551607897244325241390183963",
                "9084237671732349361622604103010111563",
                "185845852160614897619048903410496139504",
                "208322761451658317154631074413909015154",
                "185082032209968563001193921342815963010",
                "186270198572434066780252391661755022115",
                "50486728262798664783477895502371598539",
                "238538377523240267513329349303468711107",
                "244601293052885541233433686491443506785",
                "57107941115571653783496538010191647563",
                "218390482235484409823204904791605352948",
                "278618590998667647087943783369648520885",
                "166932922021684597834217713555700614848",
                "195146750242824880305351287025864433794",
                "22185783351391265490991248551830443790",
                "84577917608870377487401127617600840478",
                "181807139630374287586913659774436982587",
                "57536454303877057962146740463074587417",
                "233082035197181483690985219850815497923",
                "258752981139989151020579234742060642985",
                "117578550962584056793915946910351421511",
                "61491189147592498635277465718922381231",
                "108836589434530459216980942412049144973",
                "335081944872175553627843886622382730268",
                "95625288284106286882967882031022885083",
                "49585425216726811453278729953818840069",
                "237978599236179955971782873432814558865",
                "339536106570935589585141430302204605375",
                "294128945153324378199602375625233392002",
                "202780183330052102017085865184175332675",
                "235316235711897240953832705127279614660",
                "19322163383816135294590054626317666890",
                "149134396912841586962585068550949712513",
                "154871753701657350703814844030645535224",
                "138740526242742065281847547013745442303",
                "236008771591026412195639438620995675865",
                "303492404983386076464265066061129154306",
                "93317831494390685477701447882423156453",
                "165379616122019241837551638587367351881",
                "165877849408296707887289760177956569788",
                "260572460417766524035127727657875885064",
                "15599565959541491860649101577670499488",
                "285410099532478080544838165762270161618"
            ],
            "threshold": 0.9
        },
        "source": "https://github.com/igrr/axtls-8266/commit/5efe2947ab45e81d84b5f707c51d1c64be52f36c",
        "signature_type": "Line",
        "target": {
            "file": "ssl/x509.c"
        }
    },
    {
        "deprecated": false,
        "signature_version": "v1",
        "id": "CVE-2018-16253-94fc8e4b",
        "digest": {
            "length": 389.0,
            "function_hash": "74073868604478741200156603912144804076"
        },
        "source": "https://github.com/igrr/axtls-8266/commit/5efe2947ab45e81d84b5f707c51d1c64be52f36c",
        "signature_type": "Function",
        "target": {
            "file": "ssl/x509.c",
            "function": "get_signature"
        }
    },
    {
        "deprecated": false,
        "signature_version": "v1",
        "id": "CVE-2018-16253-c256e85e",
        "digest": {
            "line_hashes": [
                "253007544034811596310265824059848257290",
                "268133784929346848139382881450918463779",
                "65170034753240938602689110438809907804",
                "4989148451732204170605134390826381115"
            ],
            "threshold": 0.9
        },
        "source": "https://github.com/igrr/axtls-8266/commit/5efe2947ab45e81d84b5f707c51d1c64be52f36c",
        "signature_type": "Line",
        "target": {
            "file": "ssl/os_port.h"
        }
    },
    {
        "deprecated": false,
        "signature_version": "v1",
        "id": "CVE-2018-16253-d6e58869",
        "digest": {
            "length": 702.0,
            "function_hash": "232285230700911005501498625380349597162"
        },
        "source": "https://github.com/igrr/axtls-8266/commit/5efe2947ab45e81d84b5f707c51d1c64be52f36c",
        "signature_type": "Function",
        "target": {
            "file": "ssl/x509.c",
            "function": "sig_verify"
        }
    },
    {
        "deprecated": false,
        "signature_version": "v1",
        "id": "CVE-2018-16253-ec948ef3",
        "digest": {
            "length": 2514.0,
            "function_hash": "47102076113973104952396175716829351788"
        },
        "source": "https://github.com/igrr/axtls-8266/commit/5efe2947ab45e81d84b5f707c51d1c64be52f36c",
        "signature_type": "Function",
        "target": {
            "file": "ssl/x509.c",
            "function": "x509_verify"
        }
    }
]
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-16253.json"
vanir_signatures_modified 
"2026-04-11T12:27:49Z"