PT-2021-17381 · Solarwinds · Solarwinds Orion Virtual Infrastructure Monitor

Harrison Neal · Published 2021-03-30 · Updated 2021-07-20 · CVE-2021-27277

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions SolarWinds Orion Virtual Infrastructure Monitor version 2020.2

Description This issue allows local attackers to escalate privileges on affected installations. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this issue. The specific flaw exists within the OneTimeJobSchedulerEventsService WCF service, resulting from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this issue to escalate privileges and execute arbitrary code in the context of SYSTEM.

Recommendations For SolarWinds Orion Virtual Infrastructure Monitor version 2020.2, consider disabling the OneTimeJobSchedulerEventsService WCF service until a patch is available to prevent deserialization of untrusted data and mitigate the risk of privilege escalation. At the moment, there is no information about a newer version that contains a fix for this issue.

Fix

Deserialization of Untrusted Data

Weakness Enumeration

CWE-502

Related Identifiers

CVE-2021-27277

ZDI-21-373

Affected Products

Solarwinds Orion Virtual Infrastructure Monitor

References · 5

• https://documentation.solarwinds.com/en/Success_Center/SAM/Content/Release_Notes/SAM_2020-2-5_release_notes.htm#Fixed · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-27277 · Security Note
• https://osv.dev/vulnerability/CVE-2021-27277 · Vendor Advisory
• https://zerodayinitiative.com/advisories/ZDI-21-373 · Security Note
• https://t.me/cvenotify/13925 · Telegram Post