4.7

CVE-2019-18222: arm mbed_crypto Observable Discrepancy

CVSS: 4.7v3.1MediumModified
AliasesALPINE-CVE-2019-18222UBUNTU-CVE-2019-18222DEBIAN-CVE-2019-18222
Published 23-01-2020Last modified 05-08-2024
Open JSON

Vulnerability summary

CVE-2019-18222 is a medium (CVSS 4.7) Observable Discrepancy vulnerability in arm mbed_crypto. EPSS estimates a 0.34% chance of exploitation in the next 30 days, higher than 25.9% of scored vulnerabilities.

Overall risk
19/100
0100
Low · default modelHow is this calculated?
CVSS score
4.7/10
010
Medium · v3.1 (NVD)
EPSS score
0.34%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2
DLA-3249-1MGASA-2020-0053

Timeline

  1. 23-01-2020
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.34%

Chance of exploitation in the next 30 days

Percentile

26%

Versus all other CVEs

30-day change

0.00 pp

From 0.34% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.34%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Arm2 products
Debian2 products
Alpine1 product
  • mbedtls< 2.16.4-r0
Fedoraproject1 product
Ubuntu1 product
  • mbedtlsAll versions (No fix recorded)

5 vendors · 7 products

References

9 links