CVE-2019-13628: Medium severity wolfssl wolfmqtt vulnerability
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.
Other sources
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.
Affected Software
Event History
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.