Summaryinfo

A vulnerability has been found in Red Hat Enterprise Linux 7/8 and classified as critical. This vulnerability affects unknown code of the component PGP Signature Handler. Performing a manipulation as part of Firmware results in signature verification. This vulnerability is identified as CVE-2020-10759. The attack is only possible with local access. There is not any exploit available. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Detailsinfo

A vulnerability was found in Red Hat Enterprise Linux 7/8 (Operating System). It has been classified as critical. This affects an unknown part of the component PGP Signature Handler. The manipulation as part of a Firmware leads to a signature verification vulnerability. CWE is classifying the issue as CWE-347. The product does not verify, or incorrectly verifies, the cryptographic signature for data. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A PGP signature bypass flaw was found in fwupd (all versions), which could lead to the installation of unsigned firmware. As per upstream, a signature bypass is theoretically possible, but not practical because the Linux Vendor Firmware Service (LVFS) is either not implemented or enabled in versions of fwupd shipped with Red Hat Enterprise Linux 7 and 8. The highest threat from this vulnerability is to confidentiality and integrity.

The weakness was released 09/15/2020 as Bug 1844316 as not defined bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. This vulnerability is uniquely identified as CVE-2020-10759 since 03/20/2020. The exploitability is told to be difficult. An attack has to be approached locally. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/16/2025).

The vulnerability scanner Nessus provides a plugin with the ID 236732 (Alibaba Cloud Linux 3 : 0048: fwupd (ALINUX3-SA-2021:0048)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (236732). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Red Hat

Name

• Enterprise Linux

Version

• 7
• 8

License

• commercial

Website

• Vendor: https://www.redhat.com/

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