CVE-2022-28737

low-risk
Published 2023-07-20

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.

Do I need to act?

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0.02% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.5/10 Medium
LOCAL / LOW complexity

Affected Products (1)

Shim

Affected Vendors

Redhat

References (4)

Third Party Advisory https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28737
Mailing List https://www.openwall.com/lists/oss-security/2022/06/07/5
Third Party Advisory https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28737
Mailing List https://www.openwall.com/lists/oss-security/2022/06/07/5
26
/ 100
low-risk
Severity 21/34 · High
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal