Information disclosure in mbed Crypto and mbed TLS - CVE-2019-16910

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU31909

Information disclosure in mbed Crypto and mbed TLS - CVE-2019-16910

Published: September 26, 2019 / Updated: July 27, 2020


Vulnerability identifier: #VU31909
CSH Severity: Medium
CVSS v4: 5.9 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-16910
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

Arm Mbed TLS before 2.19.0 and Arm Mbed Crypto before 2.0.0, when deterministic ECDSA is enabled, use an RNG with insufficient entropy for blinding, which might allow an attacker to recover a private key via side-channel attacks if a victim signs the same message many times. (For Mbed TLS, the fix is also available in versions 2.7.12 and 2.16.3.)


Affected software

mbed Crypto
mbed TLS
mbedtls (Alpine package)
mbedtls
Fedora

How to mitigate CVE-2019-16910

Install update from vendor's website.

mbed Crypto - update to 2.0.0
mbed TLS - addressed in versions 2.7.12, 2.16.3, 2.19.0
mbedtls (Alpine package) - addressed in versions 2.16.3-r0, 2.16.5-r0
mbedtls - addressed in versions 2.7.12-1.el6, 2.7.12-1.el7, 2.16.3-1.el8, 2.16.3-1.fc29, 2.16.3-1.fc30, 2.16.3-1.fc31

External References

Related Security Bulletins