Remote code execution in Microsoft SQL Server Reporting Services

1) Input validation error

EUVDB-ID: #VU25231

Risk: Medium

CVSSv4.0: 7.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Green]

CVE-ID: CVE-2020-0618

CWE-ID: CWE-20 - Improper input validation

Exploit availability: Yes

Description

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

The vulnerability exists due to insufficient validation of page requests. A remote authenticated attacker can submit a specially crafted page request to the affected Reporting Services instance and execute arbitrary code on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft SQL Server: 2012 11.0.2100.60 - 2016 13.0.1601.5

CPE2.3

• cpe:2.3:a:microsoft:microsoft_sql_server:2012:11.0.2100.60:*:*:*:*:*:*
• cpe:2.3:a:microsoft:microsoft_sql_server:2014:12.0.2000.8:*:*:*:*:*:*
• cpe:2.3:a:microsoft:microsoft_sql_server:2016:13.0.1601.5:*:*:*:*:*:*

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0618
https://github.com/rapid7/metasploit-framework/tree/master/modules/exploits/windows/http/ssrs_navcorrector_viewstate.rb

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user 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?

Yes. This vulnerability is being exploited in the wild.