High
Security advisory
wolfSSL before 4.3.0 mishandles calls to wc_SignatureGenerateHash, leading to fault injection in RSA cryptography.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2019-19962
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 12:29 UTC · Revision 1
Source evidence
wolfSSL before 4.3.0 mishandles calls to wc_SignatureGenerateHash, leading to fault injection in RSA cryptography.
osv:CVE-2019-19962
Complete source record
{
"id": "743988f54ef06e51140c7afabe7e6962321edb6a9278c016ad23305dcce278b1",
"url": "https://osv.dev/vulnerability/CVE-2019-19962",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2019-19962",
"summary": "wolfSSL before 4.3.0 mishandles calls to wc_SignatureGenerateHash, leading to fault injection in RSA cryptography.",
"evidence": "osv:CVE-2019-19962",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2019-19962",
"aliases": [
"CVE-2019-19962"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/wolfssl/wolfssl",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "3f13b49fa318fbd3216d7da36d942e7c276d3413"
},
{
"fixed": "23878512c65834d12811b1107d19a001478eca5d"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "4.3.0"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "23878512c65834d12811b1107d19a001478eca5d"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "3f13b49fa318fbd3216d7da36d942e7c276d3413"
}
],
"source": "REFERENCES_TAG",
"original_tag": "v4.3.0-stable"
}
]
}
}
],
"versions": [
"v4.2.0c",
"v4.2.0-stable",
"v4.1.0-stable",
"v4.0.0-stable",
"list",
"v3.15.7-stable",
"v3.15.6",
"v3.15.5a",
"v3.15.5-stable",
"WCv4-rng-stable",
"v3.15.3-stable",
"l",
"v3.15.0-stable",
"v3.14.4",
"v3.14.2",
"v3.14.0b",
"v3.14.0a",
"v3.14.0-stable",
"v3.13.3",
"v3.13.2",
"v3.13.0-stable",
"v3.12.2-stable",
"v3.12.0-stable",
"v3.11.1-tls13-beta",
"v3.11.0-stable",
"v3.10.3",
"v3.10.2-stable",
"v3.10.0a",
"v3.10.0-stable",
"v3.9.10b",
"v3.9.10-stable",
"v3.9.8",
"v3.9.6w",
"v3.9.6",
"v3.9.1",
"v3.9.0",
"v3.8.0",
"v3.7.3",
"v3.7.1",
"v3.7.0",
"v3.6.9",
"v3.6.8",
"v3.4.6",
"v3.4.2",
"v3.4.0",
"v3.3.3",
"v3.3.0",
"v3.2.6",
"v3.2.4",
"v3.2.0",
"v2.9.4",
"v2.9.2",
"v2.9.1",
"v0.5",
"v2.9.0",
"v2.8.6",
"v2.8.5a",
"v2.8.5",
"v2.8.4",
"v2.8.3",
"v2.8.2",
"v2.8.0",
"v2.7.2",
"v2.7.0",
"v2.6.2",
"v2.6.0",
"v2.4.7",
"v2.4.6",
"v2.4.2",
"v2.0.8",
"v2.0.6",
"v2.0.3",
"v2.0.2",
"v2.0rc3",
"v2.0rc2b",
"v2.0rc2",
"v2.0rc1",
"v1.9.0",
"v1.8.8.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-19962.json",
"vanir_signatures": [
{
"id": "CVE-2019-19962-cb157592",
"digest": {
"length": 1498,
"function_hash": "280898526316883553796056131544822533631"
},
"source": "https://github.com/wolfssl/wolfssl/commit/23878512c65834d12811b1107d19a001478eca5d",
"target": {
"file": "wolfcrypt/src/signature.c",
"function": "wc_SignatureGenerate"
},
"deprecated": false,
"signature_type": "Function",
"signature_version": "v1"
},
{
"id": "CVE-2019-19962-d0418dcd",
"digest": {
"threshold": 0.9,
"line_hashes": [
"183367531506453828284431957714265796015",
"271727920447747985602935363666729442300",
"34178006291805681364937247187268621194",
"340070323416878982152651177810941381459",
"188995703146070082731579765576360226735",
"310917005651176049786524605881406992440",
"186857375698041729311043402017510064986",
"235113494579492487338458246341156289228",
"151410232500645864130398883313760298884",
"713984314885704256716525077298191989"
]
},
"source": "https://github.com/wolfssl/wolfssl/commit/23878512c65834d12811b1107d19a001478eca5d",
"target": {
"file": "wolfssl/wolfcrypt/signature.h"
},
"deprecated": false,
"signature_type": "Line",
"signature_version": "v1"
},
{
"id": "CVE-2019-19962-defd775c",
"digest": {
"length": 1574,
"function_hash": "174358811701169574470443216876701897213"
},
"source": "https://github.com/wolfssl/wolfssl/commit/23878512c65834d12811b1107d19a001478eca5d",
"target": {
"file": "wolfcrypt/src/signature.c",
"function": "wc_SignatureGenerateHash"
},
"deprecated": false,
"signature_type": "Function",
"signature_version": "v1"
},
{
"id": "CVE-2019-19962-e04c9ee8",
"digest": {
"threshold": 0.9,
"line_hashes": [
"47688785896623568419890783518549967432",
"35520306330409795435397136097059283129",
"37559554382899629595729250643348733372",
"43326292487791229774476501769669468623",
"13777234730378247670422650177782737029",
"296599009438651474580404452929488205716",
"5707132540592112121849258836230133498",
"71189508136670216034639939856853736655",
"129506018324396444813167887759095444349",
"37559554382899629595729250643348733372",
"162643340043010986344605972215757630769",
"332914235055617855737065860458990384820",
"304629791392230374913539484445356968870",
"264216294140627362848053985132971342033"
]
},
"source": "https://github.com/wolfssl/wolfssl/commit/23878512c65834d12811b1107d19a001478eca5d",
"target": {
"file": "wolfcrypt/src/signature.c"
},
"deprecated": false,
"signature_type": "Line",
"signature_version": "v1"
}
],
"vanir_signatures_modified": "2026-10-20T13:42:13Z"
}
}
],
"modified": "2026-10-20T13:42:13.685774749Z",
"provider": "osv",
"references": [
"https://github.com/wolfSSL/wolfssl/releases/tag/v4.3.0-stable",
"https://github.com/wolfSSL/wolfssl/commit/23878512c65834d12811b1107d19a001478eca5d"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2019-19962",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 387976,
"published_at": "2019-12-25T00:15:10.837+00:00"
}