CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:M/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
AI Score
Confidence
High
EPSS
Percentile
23.7%
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.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Alpine | edge-community | noarch | mbedtls2 | < 2.16.6-r0 | UNKNOWN |
Alpine | edge-main | noarch | mbedtls | < 2.16.6-r0 | UNKNOWN |
Alpine | 3.10-main | noarch | mbedtls | < 2.16.6-r0 | UNKNOWN |
Alpine | 3.11-main | noarch | mbedtls | < 2.16.6-r0 | UNKNOWN |
Alpine | 3.12-main | noarch | mbedtls | < 2.16.6-r0 | UNKNOWN |
Alpine | 3.13-main | noarch | mbedtls | < 2.16.6-r0 | UNKNOWN |
Alpine | 3.14-main | noarch | mbedtls | < 2.16.6-r0 | UNKNOWN |
Alpine | 3.15-main | noarch | mbedtls | < 2.16.6-r0 | UNKNOWN |
Alpine | 3.16-main | noarch | mbedtls | < 2.16.6-r0 | UNKNOWN |
Alpine | 3.17-main | noarch | mbedtls | < 2.16.6-r0 | UNKNOWN |
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:M/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
AI Score
Confidence
High
EPSS
Percentile
23.7%