Upstream information

CVE-2020-10932 at MITRE

Description

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.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having moderate severity.

CVSS v2 Scores
CVSS detail National Vulnerability Database
Base Score 1.9
Vector AV:L/AC:M/Au:N/C:P/I:N/A:N
Access Vector Local
Access Complexity Medium
Authentication None
Confidentiality Impact Partial
Integrity Impact None
Availability Impact None
CVSS v3 Scores
CVSS detail National Vulnerability Database
Base Score 4.7
Vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack Vector Local
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact None
Availability Impact None
CVSSv3 Version 3.1
SUSE Bugzilla entry: 1181468 [RESOLVED / FIXED]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
SUSE Package Hub 15 SP2
  • libmbedcrypto3 >= 2.16.9-bp152.2.3.1
  • libmbedcrypto3-64bit >= 2.16.9-bp152.2.3.1
  • libmbedtls12 >= 2.16.9-bp152.2.3.1
  • libmbedtls12-64bit >= 2.16.9-bp152.2.3.1
  • libmbedx509-0 >= 2.16.9-bp152.2.3.1
  • libmbedx509-0-64bit >= 2.16.9-bp152.2.3.1
  • mbedtls-devel >= 2.16.9-bp152.2.3.1
 Patchnames:
openSUSE-2021-397
openSUSE Leap 15.2
  • libmbedcrypto3 >= 2.16.9-lp152.2.3.1
  • libmbedcrypto3-32bit >= 2.16.9-lp152.2.3.1
  • libmbedtls12 >= 2.16.9-lp152.2.3.1
  • libmbedtls12-32bit >= 2.16.9-lp152.2.3.1
  • libmbedx509-0 >= 2.16.9-lp152.2.3.1
  • libmbedx509-0-32bit >= 2.16.9-lp152.2.3.1
  • mbedtls-devel >= 2.16.9-lp152.2.3.1
 Patchnames:
openSUSE-2021-384

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s) Source package State
Products past their end of life and not receiving proactive updates anymore.
SUSE Package Hub 15 SP2 mbedtls Released

SUSE Timeline for this CVE

CVE page created: Wed Apr 15 23:50:55 2020
CVE page last modified: Thu Dec 11 16:43:46 2025