CVE-2020-1066

EPSS 2.3%◆ VulnCheck KEV

Vexday Risk Score

45Attention

SSVC decision (CISA)

Act

Exploitation + impact → act immediately

Exploit maturity

Proof of concept

Public proof of concept exists, but not yet automated.

CVSS —EPSS 2.3%KEV nãoPoC públicaNuclei —Metasploit —Patch —

Lifecycle

21 May 2020Published on NVD

01 Jun 2020Public PoC

Weaponization speed

10 daysto first PoC

Recommendation: Patch as soon as possible — active exploitation confirmed.

An elevation of privilege vulnerability exists in .NET Framework which could allow an attacker to elevate their privilege level.To exploit the vulnerability, an attacker would first have to access the local machine, and then run a malicious program.The update addresses the vulnerability by correcting how .NET Framework activates COM objects., aka '.NET Framework Elevation of Privilege Vulnerability'.

Affected products

Microsoft · Microsoft .NET Framework 3.0 Microsoft · Microsoft .NET Framework 3.5.1

public PoCs found — 3

vulncheckvulncheck.com/xdb/d867e88863fbunverified vulncheckvulncheck.com/xdb/59897520e0c8unverified vulncheckvulncheck.com/xdb/db8fc8015f3eunverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1066