CVE-2021-24119
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…
Does this matter?
Lower severity and a low EPSS score (1.48%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 4.9 MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 1.48% probability · 73th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-203
- Affected
- arm/mbed tls · fedoraproject/fedora · debian/debian linux
- Source
- cve@mitre.org
References
- https://github.com/ARMmbed/mbedtls/releasesRelease Notes, Third Party Advisory
- https://github.com/UzL-ITS/util-lookup/blob/main/cve-vulnerability-publication.mdRelease Notes, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/11/msg00021.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/12/msg00036.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DRRVY7DMTX3ECFNZKDYTSFEG5AI2HBC6/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EYJW7HAW3TDV2YMDFYXP3HD6WRQRTLJW/Mailing List, Third Party Advisory
- https://github.com/ARMmbed/mbedtls/releasesRelease Notes, Third Party Advisory
- https://github.com/UzL-ITS/util-lookup/blob/main/cve-vulnerability-publication.mdRelease Notes, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/11/msg00021.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/12/msg00036.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2025/06/msg00034.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DRRVY7DMTX3ECFNZKDYTSFEG5AI2HBC6/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EYJW7HAW3TDV2YMDFYXP3HD6WRQRTLJW/Mailing List, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.