Use of a Broken or Risky Cryptographic Algorithm Affecting mbedtls package, versions <2.16.9-0.1
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Test your applications- Snyk ID SNYK-DEBIAN11-MBEDTLS-565788
- published 15 Apr 2020
- disclosed 15 Apr 2020
Introduced: 15 Apr 2020
CVE-2020-10932 Open this link in a new tabHow to fix?
Upgrade Debian:11 mbedtls to version 2.16.9-0.1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream mbedtls package and not the mbedtls package as distributed by Debian.
See How to fix? for Debian:11 relevant fixed versions and status.
An issue was discovered in Arm Mbed TLS before 2.16.6 and 2.7.x before 2.7.15. An attacker that can get precise enough side-channel measurements can recover the long-term ECDSA private key by (1) reconstructing the projective coordinate of the result of scalar multiplication by exploiting side channels in the conversion to affine coordinates; (2) using an attack described by Naccache, Smart, and Stern in 2003 to recover a few bits of the ephemeral scalar from those projective coordinates via several measurements; and (3) using a lattice attack to get from there to the long-term ECDSA private key used for the signatures. Typically an attacker would have sufficient access when attacking an SGX enclave and controlling the untrusted OS.
References
- https://security-tracker.debian.org/tracker/CVE-2020-10932
- https://tls.mbed.org/tech-updates/releases/mbedtls-2.16.6-and-2.7.15-released
- https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2020-04
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FCWN5HIF4CJ2LZTOMEBJ7Q4IMMV7ZU2V/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZNOS2IIBH5WNJXZUV546PY7666DE7Y3L/
- https://tls.mbed.org/tech-updates/security-advisories
- https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNOS2IIBH5WNJXZUV546PY7666DE7Y3L/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FCWN5HIF4CJ2LZTOMEBJ7Q4IMMV7ZU2V/