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Q1What is this vulnerability? (Essence + Consequences)
๐จ **Essence**: A Remote Code Execution (RCE) flaw in Microsoft SQL Server Reporting Services (SSRS). ๐ **Consequences**: Attackers can execute arbitrary code on the vulnerable server, leading to full system compromise.โฆ
๐ข **Vendor**: Microsoft. ๐ฆ **Product**: Microsoft SQL Server Reporting Services (SSRS). ๐ **Affected Versions**: Microsoft SQL Server 2012, Microsoft SQL Server 2014 Service Pack.โฆ
๐ป **Privileges**: The attacker gains the ability to **execute code** on the system. ๐ **Impact**: This typically implies **System/Local Administrator** privileges depending on the SSRS service account.โฆ
๐ **Self-Check**: Send a POST request to `/ReportServer/pages/ReportViewer.aspx`. ๐ค **Payload**: Use `NavigationCorrector$ViewState=[PayloadHere]` with a test payload.โฆ
๐ก๏ธ **Official Fix**: **YES**. ๐ **Date**: Microsoft published the advisory on 2020-02-11. ๐ **Action**: Apply the latest security updates/patches for SQL Server 2012 and 2014.โฆ
๐ง **Workaround**: If patching is delayed, **block external access** to the SSRS web interface (`/ReportServer/`). ๐ซ **Firewall**: Restrict access to trusted internal IPs only.โฆ
๐ฅ **Urgency**: **CRITICAL**. ๐จ **Priority**: **P1 (Immediate Action Required)**. โก **Reason**: It is a remote, unauthenticated (or low-auth) RCE vulnerability with public exploits.โฆ