DEBIAN-CVE-2020-10932
- Source
- https://security-tracker.debian.org/tracker/CVE-2020-10932
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-10932.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2020-10932
- Upstream
- Published
- 2020-04-15T14:15:20Z
- Modified
- 2025-09-30T03:54:20Z
- Severity
-
- 4.7 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
- Summary
- [none]
- Details
-
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
Affected packages
Debian:11 / mbedtls
Package
- Name
- mbedtls
- Purl
- pkg:deb/debian/mbedtls?arch=source
Debian:12 / mbedtls
Package
- Name
- mbedtls
- Purl
- pkg:deb/debian/mbedtls?arch=source
Debian:13 / mbedtls
Package
- Name
- mbedtls
- Purl
- pkg:deb/debian/mbedtls?arch=source
Debian:14 / mbedtls
Package
- Name
- mbedtls
- Purl
- pkg:deb/debian/mbedtls?arch=source