ArchLinuxASA-202003-7[ASA-202003-7] mbedtls: private key recovery
4.7 Medium
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
1.9 Low
CVSS2
Access Vector
LOCAL
Access 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
0.001 Low
EPSS
Percentile
18.5%
Arch Linux Security Advisory ASA-202003-7
Severity: High
Date : 2020-03-11
CVE-ID : CVE-2019-18222
Package : mbedtls
Type : private key recovery
Remote : No
Link : https://security.archlinux.org/AVG-1104
Summary
The package mbedtls before version 2.16.5-1 is vulnerable to private
key recovery.
Resolution
Upgrade to 2.16.5-1.
pacman -Syu “mbedtls>=2.16.5-1”
The problem has been fixed upstream in version 2.16.5.
Workaround
None.
Description
The ECDSA signature implementation in ecdsa.c in Arm Mbed Crypto before
3.0.1 and Mbed TLS before 2.20.0, 2.16.4 or 2.7.13 does not reduce the
blinded scalar before computing the inverse, which allows a local
attacker to recover the private key via side-channel attacks.
Impact
A local attacker can recover an ECDSA private key via side-channel
attacks.
References
https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2019-12
https://security.archlinux.org/CVE-2019-18222
Related
4.7 Medium
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
1.9 Low
CVSS2
Access Vector
LOCAL
Access 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
0.001 Low
EPSS
Percentile
18.5%