CVE-2021-35211

Description

Microsoft discovered a remote code execution (RCE) vulnerability in the SolarWinds Serv-U product utilizing a Remote Memory Escape Vulnerability. If exploited, a threat actor may be able to gain privileged access to the machine hosting Serv-U Only. SolarWinds Serv-U Managed File Transfer and Serv-U Secure FTP for Windows before 15.2.3 HF2 are affected by this vulnerability.

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

• 9.0CVSS 3.1, Criticalfrom the CNA (SolarWinds)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

What to do

• SolarWinds has released a hotfix 15.2.3 HF2 It is suggested to upgrade to the latest hotfix as soon as possibleCNA solution statement
• SolarWinds advises to disconnect Serv-U Server from internet until patched.CNA workaround statement
• Apply updates per vendor instructions.CISA KEV required action

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

Timeline

1. 14 Jul 2021 Published
2. 3 Nov 2021 CVE-2021-35211 added to CISA KEV
3. 3 Nov 2021 Added to the CISA KEV catalogue

Weakness

• CWE-787

References

• www.solarwinds.comx_refsource_MISC
• www.microsoft.comx_refsource_MISC