CVE-2021-31474 Deserialization in Network Performance Monitor

What is CVE-2021-31474?

CVE-2021-31474 is a critical unsafe deserialization vulnerability in SolarWinds Network Performance Monitor, published on 21 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

This vulnerability allows remote attackers to execute arbitrary code on affected installations of SolarWinds Network Performance Monitor 2020.2.1. Authentication is not required to exploit this vulnerability. The specific flaw exists within the SolarWinds.Serialization library. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to execute code in the context of SYSTEM. Was ZDI-CAN-12213.

Weakness: CWE-502

Which versions are affected by CVE-2021-31474?

It affects 1 product.

Products include Solarwinds Network Performance Monitor.

How do I fix CVE-2021-31474?

No fix has been published for CVE-2021-31474 yet. Limit exposure of the affected software until one is available.

Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.

Is CVE-2021-31474 being exploited?

There is no known exploitation of CVE-2021-31474 in the wild and no public exploit code.

Other vulnerabilities in SolarWinds Network Performance Monitor

• CVE-2020-27869 SQL injection in Network Performance Monitor High 8.8
• CVE-2018-13442 SQL injection in n/a High 8.8
• CVE-2021-35225 Netpath Horizontal Privilege Escalation Vulnerability: NPM 2020.2.5 Medium 5.0
• CVE-2017-9538 Path traversal in n/a Medium 4.9
• CVE-2017-9537 Cross-site scripting in n/a Medium 4.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-v89w-qqfc-fph2.