XPath Injection in Microsoft .Net Framework 3.0
CVE-2020-0646
A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly, aka '.NET Framework Remote Code Execution Injection Vulnerability'.
EPSS: 0.992 (99.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Microsoft .Net Framework 3.0 — versions Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2, Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2, Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2
- Microsoft .Net Framework 3.5 — versions Windows 10 Version 1607 for 32-bit Systems, Windows 8.1 for 32-bit systems, Windows 8.1 for x64-based systems
- Microsoft .Net Framework 3.5.1 — versions Windows 7 for 32-bit Systems Service Pack 1, Windows 7 for x64-based Systems Service Pack 1, Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1
- Microsoft .Net Framework 3.5 And 4.6.2/4.7/4.7.1/4.7.2 On Windows 10 Version 1607 For 32-bit Systems — versions unspecified
- Microsoft .Net Framework 3.5 And 4.6.2/4.7/4.7.1/4.7.2 On Windows 10 Version 1607 For X64-based Systems — versions unspecified
- Microsoft .Net Framework 3.5 And 4.6.2/4.7/4.7.1/4.7.2 On Windows Server 2016 — versions unspecified
- Microsoft .Net Framework 3.5 And 4.6.2/4.7/4.7.1/4.7.2 On Windows Server 2016 (Server Core Installation) — versions unspecified
- Microsoft .Net Framework 3.5 And 4.7.1/4.7.2 On Windows 10 Version 1709 For 32-bit Systems — versions unspecified
- Microsoft .Net Framework 3.5 And 4.7.1/4.7.2 On Windows 10 Version 1709 For X64-based Systems — versions unspecified
- Microsoft .Net Framework 3.5 And 4.7.2 On Windows 10 For 32-bit Systems — versions unspecified
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions.
Public proof-of-concept exploits
References
- secure@microsoft.com (Patch, x_refsource_MISC, Vendor Advisory)
- secure@microsoft.com (Exploit, VDB Entry, Third Party Advisory, x_refsource_MISC)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2020-0646?
- CVE-2020-0646 is a critical-severity vulnerability in Microsoft .Net Framework 3.0, classified under XML Injection (Blind XPath Injection). CVSS score: 9.8/10. Published 2020-01-14.
- How severe is CVE-2020-0646?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2020-0646 known to be exploited?
- Yes. CVE-2020-0646 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 24 public proof-of-concept repositories are indexed.