CVE-2022-28737

There's a possible overflow in handle_image() when shim tries to load and execute crafted EFI executables

Description

There's a possible overflow in handle_image() when shim tries to load and execute crafted EFI executables; The handle_image() function takes into account the SizeOfRawData field from each section to be loaded. An attacker can leverage this to perform out-of-bound writes into memory. Arbitrary code execution is not discarded in such scenario.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.02%
Third-Party Advisory mitre.org Third-Party Advisory openwall.com
Affected: Red Hat Bootloader Team shim
Published at:
Updated at:

References

Link Tags
https://www.openwall.com/lists/oss-security/2022/06/07/5 third party advisory mailing list
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28737 third party advisory issue tracking

Frequently Asked Questions

What is the severity of CVE-2022-28737?
CVE-2022-28737 has been scored as a medium severity vulnerability.
How to fix CVE-2022-28737?
To fix CVE-2022-28737, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-28737 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-28737 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-28737?
CVE-2022-28737 affects Red Hat Bootloader Team shim.
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