CISA KEV 정보
| 취약점명 | Kaseya Virtual System/Server Administrator (VSA) Information Disclosure Vulnerability |
|---|---|
| 설명 | Kaseya Virtual System/Server Administrator (VSA) contains an information disclosure vulnerability allowing an attacker to obtain the sessionId that can be used to execute further attacks against the system. |
| 조치사항 | Apply updates per vendor instructions. |
| 랜섬웨어 캠페인 악용 | Known |
| CWE | CWE-522 |
| 등록일 (KEV) | 2021-11-03 |
| 조치 기한 | 2021-11-17 |
| 추가 참고 | https://nvd.nist.gov/vuln/detail/CVE-2021-30116 |
NVD 상세 정보
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HAV:N/AC:L/Au:N/C:P/I:P/A:P설명: Kaseya VSA before 9.5.7 allows credential disclosure, as exploited in the wild in July 2021. By default Kaseya VSA on premise offers a download page where the clients for the installation can be downloaded. The default URL for this page is https://x.x.x.x/dl.asp When an attacker download a client for Windows and installs it, the file KaseyaD.ini is generated (C:\Program Files (x86)\Kaseya\XXXXXXXXXX\KaseyaD.ini) which contains an Agent_Guid and AgentPassword This Agent_Guid and AgentPassword can be used to log in on dl.asp (https://x.x.x.x/dl.asp?un=840997037507813&pw=113cc622839a4077a84837485ced6b93e440bf66d44057713cb2f95e503a06d9) This request authenticates the client and returns a sessionId cookie that can be used in subsequent attacks to bypass authentication. Security issues discovered --- * Unauthenticated download page leaks credentials * Credentials of agent software can be used to obtain a sessionId (cookie) that can be used for services not intended for use by agents * dl.asp accepts credentials via a GET request * Access to KaseyaD.ini gives an attacker access to sufficient information to penetrate the Kaseya installation and its clients. Impact --- Via the page /dl.asp enough information can be obtained to give an attacker a sessionId that can be used to execute further (semi-authenticated) attacks against the system.
CWE: CWE-522 | CWE-522
참조
- https://csirt.divd.nl/2021/07/04/Kaseya-Case-Update-2/ [Third Party Advisory]
- https://csirt.divd.nl/2021/07/07/Kaseya-Limited-Disclosure/ [Third Party Advisory]
- https://helpdesk.kaseya.com/hc/en-gb/articles/4403440684689-Important-Notice-July-2nd-2021 [Vendor Advisory]
- https://www.secpod.com/blog/kaseya-vsa-zero-day-by-revil/ [Exploit, Third Party Advisory]
- https://csirt.divd.nl/2021/07/04/Kaseya-Case-Update-2/ [Third Party Advisory]
- https://csirt.divd.nl/2021/07/07/Kaseya-Limited-Disclosure/ [Third Party Advisory]
- https://helpdesk.kaseya.com/hc/en-gb/articles/4403440684689-Important-Notice-July-2nd-2021 [Vendor Advisory]
- https://www.secpod.com/blog/kaseya-vsa-zero-day-by-revil/ [Exploit, Third Party Advisory]
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30116 [US Government Resource]
This product uses the NVD API but is not endorsed or certified by the NVD.