Main Vulnerability Database Vulnerabilities #VU24288

Out-of-bounds write in ASP.NET Core MVC - CVE-2020-0603

Published: January 14, 2020 / Updated: June 3, 2020

Vulnerability identifier: #VU24288

CSH Severity: High

CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-0603

CWE-ID: CWE-787

Exploitation vector: Remote access

Exploit availability: Public exploit is available

Vulnerability details

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error within the ASP.NET Core. A remote attacker can create a specially crafted file, trick the victim into opening it using the affected software, trigger out-of-bounds write and execute arbitrary code on the target system.

Affected software

ASP.NET Core MVC
Red Hat Enterprise Linux for x86_64
rh-dotnet30-dotnet (Red Hat package)
rh-dotnet31-dotnet (Red Hat package)

How to mitigate CVE-2020-0603

Install update from vendor's website.

rh-dotnet30-dotnet (Red Hat package) - update to 3.0.102-3.el7
rh-dotnet31-dotnet (Red Hat package) - update to 3.1.101-4.el7

Links to Public Exploits and PoC-codes

Exploit #2911 - NationalVulnerabilityDatabase (React mock-up imitating NVD webpage @ https://nvd.nist.gov/vuln/detail/CVE-2020-0603. Build environment from create-react-app tool.) (June 3, 2020)

External References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0603