Multiple vulnerabilities in wolfSSL



| Updated: 2020-08-09
Risk Medium
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2019-19960
CVE-2019-19962
CVE-2019-19963
CWE-ID CWE-20
CWE-327
Exploitation vector Network
Public exploit N/A
Vulnerable software
 wolfSSL
Universal components / Libraries / Libraries used by multiple products

Vendor wolfSSL

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU41116

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-19960

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

wolfSSL: 4.0 - 4.1.0

CPE2.3 External links

https://github.com/wolfSSL/wolfssl/commit/5ee9f9c7a23f8ed093fe1e42bc540727e96cebb8
https://github.com/wolfSSL/wolfssl/releases/tag/v4.3.0-stable


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Use of a broken or risky cryptographic algorithm

EUVDB-ID: #VU41117

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-19962

CWE-ID: CWE-327 - Use of a Broken or Risky Cryptographic Algorithm

Exploit availability: No

Description

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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

wolfSSL: 4.0 - 4.1.0

CPE2.3 External links

https://github.com/wolfSSL/wolfssl/commit/23878512c65834d12811b1107d19a001478eca5d
https://github.com/wolfSSL/wolfssl/releases/tag/v4.3.0-stable


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Input validation error

EUVDB-ID: #VU41118

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-19963

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

wolfSSL: 4.0 - 4.1.0

CPE2.3 External links

https://github.com/wolfSSL/wolfssl/commit/7e391f0fd57f2ef375b1174d752a56ce34b2b190
https://github.com/wolfSSL/wolfssl/releases/tag/v4.3.0-stable


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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