Vulnerability · Published May 21, 2021 · Assigned by zdi

CVE-2021-31474

Critical 9.8

In plain English

A critical-severity unsafe deserialization in Network Performance Monitor from SolarWinds. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 93.9% (higher than 99.8% of all known vulnerabilities).

Severity (CVSS 3.0)9.8Critical

Exploit odds (30 days)93.9%top 0.2% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
SolarWinds	Network Performance Monitor	2020.2.1

Weakness: CWE-502 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

https://www.zerodayinitiative.com/advisories/ZDI-21-602/ x_refsource_MISC
https://documentation.solarwinds.com/en/success_center/sam/content/release_notes/sam_2020-2-5_release_notes.htm x_refsource_MISC