| Name | CVE-2019-18222 |
| 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-3249-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| mbedtls (PTS) | stretch (security), stretch (lts), stretch | 2.4.2-1+deb9u4 | vulnerable |
| buster (security), buster, buster (lts) | 2.16.9-0~deb10u1 | fixed |
| bullseye | 2.16.9-0.1 | fixed |
| bookworm | 2.28.3-1 | fixed |
| sid, trixie | 3.6.2-3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| mbedtls | source | buster | 2.16.9-0~deb10u1 | | DLA-3249-1 | |
| mbedtls | source | (unstable) | 2.16.4-1 | | | |
Notes
[stretch] - mbedtls <no-dsa> (Minor issue)
https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2019-12
Fixed upstream in 2.20.0, 2.16.4 and 2.7.13