Security restrictions bypass in Dell EMC Avamar

1) Security restrictions bypass

EUVDB-ID: #VU15724

Risk: Low

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-16395

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass security restrictions on the target system.

The weakness exists in OpenSSL::X509::Name due to the equality check is not correct if the value of an entity of the argument (right-hand side) starts with the value of the receiver (left-hand side). A remote attacker can supply malicious X.509 certificate to be passed and bypass security restrictions to conduct further attacks.

Mitigation

Install update from vendor's website.

Vulnerable software versions

EMC Avamar: 7.2.1 - 18.2

External links

http://www.dell.com/support/kbdoc/fr-fr/printview/000153517/10/en

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.