.NET Core on Red Hat Enterprise Linux update for rh-dotnet31-dotnet

1) Input validation error

EUVDB-ID: #VU46500

Risk: Medium

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-1045

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists due to insufficient validation of encoded cookie names. The ASP.NET Core cookie parser decodes entire cookie strings which could allow a malicious attacker to set a second cookie with the name being percent encoded.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

rh-dotnet31-dotnet (Red Hat package): 3.1.101-4.el7 - 3.1.106-1.el7

CPE2.3

• cpe:2.3:a:red_hat:rh-dotnet31-dotnet_redhat_package:3.1.101-4.el7:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:a:red_hat:rh-dotnet31-dotnet_redhat_package:3.1.104-2.el7:*:*:*:*:red_hat_enterprise_linux:*:*
• cpe:2.3:a:red_hat:rh-dotnet31-dotnet_redhat_package:3.1.106-1.el7:*:*:*:*:red_hat_enterprise_linux:*:*

External links

https://access.redhat.com/errata/RHSA-2020:3697

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.