Remote buffer overflow in Microsoft SQL Server

1) Buffer overflow

EUVDB-ID: #VU14383

Risk: Medium

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-8273

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to boundary error when processing SQL queries. A remote attacker with ability to manipulate SQL query can trigger buffer overflow and execute arbitrary code on the vulnerable database server in the context of the SQL Server Database Engine service account. 

Please, note this vulnerability can be also exploited by anonymous attacker via SQL injection vulnerability.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft SQL Server: 2016 13.0.1601.5 - 2017 14.0.1000.169

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8273

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.