Medium
Security advisory
In wolfSSL through 4.6.0, a side-channel vulnerability in base64 PEM file decoding allows system-level (administrator) attackers to obtain information about secret RSA keys via a controlled-channel and side-channel attack on software running in isolated environments that can be single stepped, especially Intel SGX.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-24116
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 11:40 UTC · Revision 1
Source evidence
In wolfSSL through 4.6.0, a side-channel vulnerability in base64 PEM file decoding allows system-level (administrator) attackers to obtain information about secret RSA keys via a controlled-channel and side-channel attack on software running in isolated environments that can be single stepped, especially Intel SGX.
osv:CVE-2021-24116
Complete source record
{
"id": "25e1aaa9f71e6212929f223278fc239775dbaf75ed017a1ae87d5cdf4ff05aaa",
"url": "https://osv.dev/vulnerability/CVE-2021-24116",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-24116",
"summary": "In wolfSSL through 4.6.0, a side-channel vulnerability in base64 PEM file decoding allows system-level (administrator) attackers to obtain information about secret RSA keys via a controlled-channel and side-channel attack on software running in isolated environments that can be single stepped, especially Intel SGX.",
"evidence": "osv:CVE-2021-24116",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2021-24116",
"aliases": [
"CVE-2021-24116"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/wolfssl/wolfssl",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "9c87f979a7f1d3a6d786b260653d566c1d31a1c4"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "4.6.0"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
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"v4.4.0-stable",
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"l",
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"v3.7.3",
"v3.7.1",
"v3.7.0",
"v3.6.9",
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"v3.2.0",
"v2.9.4",
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"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",
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"v2.0.8",
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"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-2021-24116.json"
}
}
],
"modified": "2026-10-20T10:54:32.797851568Z",
"provider": "osv",
"references": [
"https://github.com/UzL-ITS/util-lookup/blob/main/cve-vulnerability-publication.md",
"https://github.com/wolfSSL/wolfssl/releases"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2021-24116",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 385548,
"published_at": "2021-07-14T13:15:08.063+00:00"
}