Vulnerability in Arm Mbed Crypto
CVE-2019-18222
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (24.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 24.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Arm Mbed Crypto
- Arm Mbed TLS
- Debian Linux — versions 10.0
- Fedoraproject Fedora — versions 30, 31
Weakness classification (CWE)
References
- tls.mbed.org/tech-updates/security-advisories (Vendor Advisory)
- tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2019-12 (Vendor Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2022/12/msg00036.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-18222?
- CVE-2019-18222 is a medium-severity vulnerability in Arm Mbed Crypto, classified under Observable Discrepancy. CVSS score: 4.7/10. Published 2020-01-23.
- How severe is CVE-2019-18222?
- Medium severity. CVSS v3 base score is 4.7 out of 10.