CVE-2019-18222
MEDIUM
4.7
CVSS Score
Published: January 23, 2020 at 12:00 AM UTC
Updated: June 17, 2026 at 02:24 AM UTC
4 products affected across 3 vendorsDebian LinuxFedorambed TLS
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Severity
MEDIUM4.7
Exploit prediction
EPSS 0.3%
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 3.0.0
Affected range stops below 3.0.0, so it looks safe — our inference, not a vendor statement
v < 2.7.132.17.0 ≤ v < 2.20.02.8.0 ≤ v < 2.16.4
Affected range stops below 2.16.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.20.0, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.7.13, so it looks safe — our inference, not a vendor statement
Debian Linux· Debiandrupal
95%Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- 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
References (5)
Mailing ListThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2022/12/msg00036.htmlVendor AdvisoryMailing ListThird Party Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A3GWQNONS7GRORXZJ7MOJFUEJ2ZJ4OUW/Vendor AdvisoryMailing ListThird Party Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NGDACU65MYZXXVPQP2EBHUJGOR4RWLVY/CVSS
- Attack Vector
- LOCAL
- Complexity
- HIGH
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- NONE
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-203
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