Medium severity · published Jan 23, 2020
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…
4.7
CVSS
0.3%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 27% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
10.0 · source: NVD
FE
Fedora · Fedoraproject
30; 31 · source: NVD
MC
Mbed Crypto · Arm
before 3.0.0 · source: NVD
MT
Mbed Tls · Arm
before 2.7.13; 2.8.0 before 2.16.4; 2.17.0 before 2.20.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-18222
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-18222
Mailing List
https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html
Mailing List
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A3GWQNONS7GRORXZJ7MOJFUEJ2ZJ4OUW/
Mailing List
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NGDACU65MYZXXVPQP2EBHUJGOR4RWLVY/
Vendor Advisory
https://tls.mbed.org/tech-updates/security-advisories
Vendor Advisory
https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2019-12
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