Denial of service in MatrixSSL

1) Out-of-bounds read

EUVDB-ID: #VU19182

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-13470

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause a denial of service (DoS) condition.

The vulnerability exists due to an out-of-bounds read condition during ASN.1 handing. A remote attacker can send a specially crafted certificate to the affected application and cause it to crash.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

MatrixSSL: 1.8.1 - 4.1.0

External links

http://github.com/matrixssl/matrixssl/blob/4-2-1-open/doc/CHANGES_v4.x.md#changes-between-420-and-421-june-2019

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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