What is the severity of CVE-2019-13628?

The severity of CVE-2019-13628 is medium, with a severity value of 4.7.

What software is affected by CVE-2019-13628?

wolfSSL and wolfCrypt versions 4.0.0 and earlier without the configurations '--enable-fpecc', '--enable-sp', or '--enable-sp-math' are affected by CVE-2019-13628.

How can a local attacker exploit CVE-2019-13628?

A local attacker, who can measure the duration of signature operations with precision, can exploit CVE-2019-13628 by inferring information through the timing side channel in ECDSA signature generation.

How can I fix CVE-2019-13628?

To fix CVE-2019-13628, upgrade to version 4.1.0 or later of wolfSSL and wolfCrypt.

Vulnerability/
CVE-2019-13628

medium

4.7

CWE

203

3/10/2019

10/10/2019

24/5/2022

CVE-2019-13628

Q: What is the vulnerability ID CVE-2019-13628?

The vulnerability ID CVE-2019-13628 refers to a timing side channel in ECDSA signature generation in wolfSSL and wolfCrypt 4.0.0 and earlier.

First published: Thu Oct 03 2019(Updated: )

wolfSSL and wolfCrypt 4.0.0 and earlier (when configured without `--enable-fpecc`, `--enable-sp`, or` --enable-sp-math`) contain a timing side channel in ECDSA signature generation. This allows a local attacker, able to precisely measure the duration of signature operations, to infer information about the nonces used and potentially mount a lattice attack to recover the private key used. The issue occurs because ecc.c scalar multiplication might leak the bit length.

Credit: cve@mitre.org cve@mitre.org

Affected Software	Affected Version	How to fix
Wolfssl Wolfssl	<=4.0.0

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Frequently Asked Questions

What is the vulnerability ID CVE-2019-13628?
The vulnerability ID CVE-2019-13628 refers to a timing side channel in ECDSA signature generation in wolfSSL and wolfCrypt 4.0.0 and earlier.
What is the severity of CVE-2019-13628?
The severity of CVE-2019-13628 is medium, with a severity value of 4.7.
What software is affected by CVE-2019-13628?
wolfSSL and wolfCrypt versions 4.0.0 and earlier without the configurations '--enable-fpecc', '--enable-sp', or '--enable-sp-math' are affected by CVE-2019-13628.
How can a local attacker exploit CVE-2019-13628?
A local attacker, who can measure the duration of signature operations with precision, can exploit CVE-2019-13628 by inferring information through the timing side channel in ECDSA signature generation.
How can I fix CVE-2019-13628?
To fix CVE-2019-13628, upgrade to version 4.1.0 or later of wolfSSL and wolfCrypt.

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