cbcvebase.
CVE-2020-10148
published 2020-12-29

CVE-2020-10148: The SolarWinds Orion API is vulnerable to an authentication bypass that could allow a remote attacker to execute API commands. This vulnerability could allow a…

PriorityP199critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
KEVITWEXPLOITInitial access
CISA Known Exploited Vulnerabilitydue 2022-05-03
Exploited in the wild
EPSS
91.98%
99.8th percentile
The SolarWinds Orion API is vulnerable to an authentication bypass that could allow a remote attacker to execute API commands. This vulnerability could allow a remote attacker to bypass authentication and execute API commands which may result in a compromise of the SolarWinds instance. SolarWinds Orion Platform versions 2019.4 HF 5, 2020.2 with no hotfix installed, and 2020.2 HF 1 are affected.

Affected

6 ranges
VendorProductVersion rangeFixed in
solarwindsorion_platform
solarwindsorion_platform
solarwindsorion_platform
solarwindsorion_platform
solarwindsorion_platform
solarwindsorion_platform

Detection & IOCsextracted from sources · hover to see the quote

path/web.config.i18n.ashx
path/SWNetPerfMon.db.i18n.ashx
filenameSolarWinds.Orion.Core.BusinessLayer.dll
yara
id: CVE-2020-10148 — matchers: body words: ["SolarWinds.Orion.Core.", "Connection String"]; header words: ["text/plain"]; status: 200
  • Exploit requests target .i18n.ashx endpoints (web.config.i18n.ashx and SWNetPerfMon.db.i18n.ashx) with arbitrary 'l' and 'v' query parameters to bypass authentication on the SolarWinds Orion API.
  • Successful exploitation returns HTTP 200 with Content-Type: text/plain and body containing 'SolarWinds.Orion.Core.' or 'Connection String' — monitor for these response characteristics on .ashx endpoints.
  • SUPERNOVA web shell (App_Web_logoimagehandler.ashx.b6031896.dll) was deployed approximately 30 minutes after post-exploitation reconnaissance commands, suggesting scan-and-exploit triage activity — monitor for rapid sequential recon commands followed by DLL drops.
  • ·Affected versions are specifically SolarWinds Orion Platform 2019.4 HF 5, 2020.2 with no hotfix installed, and 2020.2 HF 1 — detections should be scoped to these versions to reduce false positives.
  • ·The nuclei template uses stop-at-first-match across both .ashx probe paths, meaning only one request may be logged per scan attempt — network detection rules should account for either path independently.

CVSS provenance

nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv2.07.5HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
vulncheck9.8CRITICAL
cisa9.8CRITICAL
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