CVE-2019-18222
First published: Thu Jan 23 2020(Updated: )
The ECDSA signature implementation in ecdsa.c in Arm Mbed Crypto 2.1 and Mbed TLS through 2.19.1 does not reduce the blinded scalar before computing the inverse, which allows a local attacker to recover the private key via side-channel attacks.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Arm Mbed Crypto | <3.0.0 | |
| ARM mbed TLS | <2.7.13 | |
| ARM mbed TLS | >=2.8.0<2.16.4 | |
| ARM mbed TLS | >=2.17.0<2.20.0 | |
| Fedoraproject Fedora | =30 | |
| Fedoraproject Fedora | =31 | |
| Debian Debian Linux | =10.0 |
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Reference Links
- https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A3GWQNONS7GRORXZJ7MOJFUEJ2ZJ4OUW/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NGDACU65MYZXXVPQP2EBHUJGOR4RWLVY/
- https://tls.mbed.org/tech-updates/security-advisories
- https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2019-12
Frequently Asked Questions
What is CVE-2019-18222?
CVE-2019-18222 is a vulnerability in Arm Mbed Crypto 2.1 and Mbed TLS through 2.19.1 that allows a local attacker to recover the private key via side-channel attacks.
What is the severity of CVE-2019-18222?
The severity of CVE-2019-18222 is medium with a CVSS score of 4.7.
How does CVE-2019-18222 affect Arm Mbed Crypto?
CVE-2019-18222 affects Arm Mbed Crypto versions up to but excluding 3.0.0.
How does CVE-2019-18222 affect ARM mbed TLS?
CVE-2019-18222 affects ARM mbed TLS versions up to and including 2.7.13, and versions between 2.8.0 and 2.16.4, and versions between 2.17.0 and 2.20.0.
How can I fix CVE-2019-18222?
To fix CVE-2019-18222, update to Arm Mbed Crypto 3.0.0 or later, or update to a version of ARM mbed TLS that is higher than 2.20.0 or lower than 2.7.13, 2.17.0, or 2.16.4.
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