Multiple vulnerabilities in wolfSSL



Published: 2020-08-24
Risk Medium
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2020-12457
CVE-2020-15309
CVE-2020-24585
CWE-ID CWE-835
CWE-310
CWE-399
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		wolfSSL
Universal components / Libraries / Libraries used by multiple products

Vendor wolfSSL

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Infinite loop

EUVDB-ID: #VU45989

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2020-12457

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper change_cipher_spec (CCS) message processing logic for TLS 1.3. A remote attacker can send ChangeCipherSpec messages in a crafted way involving more than one in a row and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

wolfSSL: 4.0 - 4.4.0

CPE2.3 External links

http://github.com/wolfSSL/wolfssl/pull/2927
http://github.com/wolfSSL/wolfssl/releases/tag/v4.5.0-stable

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

2) Cryptographic issues

EUVDB-ID: #VU45988

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2020-15309

CWE-ID: CWE-310 - Cryptographic Issues

Exploit availability: No

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists in wolfSSL when single precision is not employed. A local user can conduct a cache-timing attack against public key operations. These attackers may already have obtained sensitive information if the affected system has been used for private key operations (e.g., signing with a private key).

Mitigation

Install updates from vendor's website.

Vulnerable software versions

wolfSSL: 4.0 - 4.4.0

CPE2.3 External links

http://github.com/wolfSSL/wolfssl/releases/tag/v4.5.0-stable

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

3) Resource management error

EUVDB-ID: #VU45987

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2020-24585

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper management of internal resources with the application within the DTLS handshake implementation in wolfSSL. Clear DTLS application_data messages in epoch 0 do not produce an out-of-order error. Instead, these messages are returned to the application.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

wolfSSL: 4.0 - 4.4.0

CPE2.3 External links

http://github.com/wolfSSL/wolfssl/pull/3219
http://github.com/wolfSSL/wolfssl/releases/tag/v4.5.0-stable

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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