Medium
mbedtls — security advisory
In Trusted Firmware Mbed TLS 2.24.0, 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
- mbedtls
- Affected versions
- 2.1.2-1, 2.16.11-0.1ubuntu1, 2.16.11-0.3, 2.16.2-1, 2.16.3-1, 2.16.4-1ubuntu2, 2.16.4-1ubuntu2+esm1, 2.16.9-0.1ubuntu1, 2.2.0-1, 2.2.1-1, 2.2.1-2, 2.2.1-2ubuntu0.1, 2.2.1-2ubuntu0.2, 2.2.1-2ubuntu0.3, 2.28.0-1, 2.28.0-1build1, 2.28.0-1ubuntu0.1~esm1, 2.28.3-1, 2.28.6-1ubuntu1, 2.28.7-1.1ubuntu1, 2.28.7-1ubuntu1, 2.28.8-1, 2.28.8-1ubuntu0.1~esm1, 2.5.1-1ubuntu1, 2.6.0-1, 2.7.0-2, 2.8.0-1, 2.8.0-1ubuntu0.1~esm1, 3.6.2-3ubuntu1, 3.6.5-0.1ubuntu1, 3.6.5-0.1ubuntu2, 3.6.6-0.1ubuntu1, 3.6.7-3ubuntu1
- Fixed versions
- Not specified
- CVEs
- CVE-2021-24119
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 01:35 UTC · Revision 1
Source evidence
In Trusted Firmware Mbed TLS 2.24.0, 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:UBUNTU-CVE-2021-24119
mbedtls
Fixed versions: Not specified
mbedtls
Fixed versions: Not specified
mbedtls
Fixed versions: Not specified
mbedtls
Fixed versions: Not specified
mbedtls
Fixed versions: Not specified
mbedtls
Fixed versions: Not specified
mbedtls
Fixed versions: Not specified
mbedtls
Fixed versions: Not specified
Complete source record
{
"id": "45cf0ad5cb9c5f8a614e9f618db4dfde12677e641ad84ccf498a611e4aeefb7b",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-24119",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2021-24119",
"summary": "In Trusted Firmware Mbed TLS 2.24.0, 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:UBUNTU-CVE-2021-24119",
"products": [
{
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},
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{
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{
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{
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{
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{
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{
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{
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"evidence": "/affected/3/versions"
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{
"value": "2.16.11-0.3",
"evidence": "/affected/3/versions"
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{
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{
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{
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{
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"evidence": "/affected/4/versions"
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{
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"evidence": "/affected/4/versions"
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{
"value": "2.28.7-1.1ubuntu1",
"evidence": "/affected/4/versions"
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{
"value": "2.28.8-1",
"evidence": "/affected/4/versions"
},
{
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"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "mbedtls",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "3.6.2-3ubuntu1",
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]
},
{
"name": {
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"evidence": "/affected/6/package/name"
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{
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{
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]
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{
"name": {
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"evidence": "/affected/7/package/name"
},
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"affected_versions": [
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"evidence": "/affected/7/versions"
},
{
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"evidence": "/affected/7/versions"
},
{
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"evidence": "/affected/7/versions"
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]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2021-24119",
"aliases": [
"UBUNTU-CVE-2021-24119"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N"
},
{
"type": "Ubuntu",
"score": "low"
}
],
"affected": [
{
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{
"type": "ECOSYSTEM",
"events": [
{
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]
}
],
"package": {
"name": "mbedtls",
"purl": "pkg:deb/ubuntu/mbedtls?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
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"2.2.0-1",
"2.2.1-1",
"2.2.1-2",
"2.2.1-2ubuntu0.1",
"2.2.1-2ubuntu0.2",
"2.2.1-2ubuntu0.3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-24119.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libmbedcrypto0",
"binary_version": "2.2.1-2ubuntu0.3"
},
{
"binary_name": "libmbedtls10",
"binary_version": "2.2.1-2ubuntu0.3"
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{
"binary_name": "libmbedx509-0",
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{
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"package": {
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"purl": "pkg:deb/ubuntu/mbedtls?arch=source&distro=esm-apps%2Fbionic",
"ecosystem": "Ubuntu:Pro:18.04:LTS"
},
"versions": [
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"2.8.0-1",
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},
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"binary_version": "2.8.0-1ubuntu0.1~esm1"
},
{
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"package": {
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"ecosystem": "Ubuntu:Pro:20.04:LTS"
},
"versions": [
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"2.16.3-1",
"2.16.4-1ubuntu2",
"2.16.4-1ubuntu2+esm1"
],
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},
"ecosystem_specific": {
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{
"binary_name": "libmbedcrypto3",
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},
{
"binary_name": "libmbedtls12",
"binary_version": "2.16.4-1ubuntu2+esm1"
},
{
"binary_name": "libmbedx509-0",
"binary_version": "2.16.4-1ubuntu2+esm1"
}
]
}
},
{
"ranges": [
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}
],
"package": {
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},
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},
"ecosystem_specific": {
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{
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{
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{
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"package": {
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{
"binary_name": "libmbedtls14t64",
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{
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},
"versions": [
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],
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},
"ecosystem_specific": {
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{
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},
{
"binary_name": "libmbedtls21",
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},
{
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{
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"package": {
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},
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],
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},
"ecosystem_specific": {
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{
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},
{
"binary_name": "libmbedtls21",
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},
{
"binary_name": "libmbedx509-7",
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]
}
},
{
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{
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}
],
"package": {
"name": "mbedtls",
"purl": "pkg:deb/ubuntu/mbedtls?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"3.6.2-3ubuntu1",
"3.6.5-0.1ubuntu1",
"3.6.5-0.1ubuntu2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-24119.json"
},
"ecosystem_specific": {
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{
"binary_name": "libmbedcrypto16",
"binary_version": "3.6.5-0.1ubuntu2"
},
{
"binary_name": "libmbedtls21",
"binary_version": "3.6.5-0.1ubuntu2"
},
{
"binary_name": "libmbedx509-7",
"binary_version": "3.6.5-0.1ubuntu2"
}
]
}
}
],
"modified": "2026-10-17T12:57:11.828872073Z",
"provider": "osv",
"upstream": [
"CVE-2021-24119"
],
"references": [
"https://ubuntu.com/security/CVE-2021-24119",
"https://github.com/ARMmbed/mbedtls/releases",
"https://github.com/UzL-ITS/util-lookup/blob/main/cve-vulnerability-publication.md",
"https://www.cve.org/CVERecord?id=CVE-2021-24119"
]
},
"related_cves": [
{
"value": "CVE-2021-24119",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 356880,
"published_at": "2021-07-14T13:15:00+00:00"
}