SB2019122506 - Multiple vulnerabilities in wolfSSL

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Input validation error (CVE-ID: CVE-2019-19960)

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

In wolfSSL before 4.3.0, wc_ecc_mulmod_ex does not properly resist side-channel attacks.

2) Use of a broken or risky cryptographic algorithm (CVE-ID: CVE-2019-19962)

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

wolfSSL before 4.3.0 mishandles calls to wc_SignatureGenerateHash, leading to fault injection in RSA cryptography.

3) Input validation error (CVE-ID: CVE-2019-19963)

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

An issue was discovered in wolfSSL before 4.3.0 in a non-default configuration where DSA is enabled. DSA signing uses the BEEA algorithm during modular inversion of the nonce, leading to a side-channel attack against the nonce.

Remediation

Install update from vendor's website.

References

• https://github.com/wolfSSL/wolfssl/commit/5ee9f9c7a23f8ed093fe1e42bc540727e96cebb8
• https://github.com/wolfSSL/wolfssl/releases/tag/v4.3.0-stable
• https://github.com/wolfSSL/wolfssl/commit/23878512c65834d12811b1107d19a001478eca5d
• https://github.com/wolfSSL/wolfssl/commit/7e391f0fd57f2ef375b1174d752a56ce34b2b190