1) Insufficient verification of data authenticity

EUVDB-ID: #VU54477

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-20271

CWE-ID: CWE-345 - Insufficient Verification of Data Authenticity

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to an error in RPM's signature check functionality when reading package files. A remote attacker can create a specially crafted package with a modified signature header, trick the victim into installing and compromise the affected system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions: 7.7

Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions: 7.7

Red Hat Enterprise Linux Server - TUS: 7.7

Red Hat Enterprise Linux Server - AUS: 7.7

rpm (Red Hat package): before 4.11.3-40.el7_7.1

---

CPE2.3

• cpe:2.3:o:red_hat:red_hat_enterprise_linux_server_-_update_services_for_sap_solutions:7.7:*:*:*:*:*:*:*

External links

http://access.redhat.com/errata/RHSA-2021:4975

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?