Shim: interger overflow leads to heap buffer overflow in verify_sbat_section on 32-bits systems
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: total
Summary
A buffer overflow was found in Shim in the 32-bit system. The overflow happens due to an addition operation involving a user-controlled value parsed from the PE binary being used by Shim. This value is further used for memory allocation operations, leading to a heap-based buffer overflow. This flaw causes memory corruption and can lead to a crash or data integrity issues during the boot phase.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: total
- Record last updated
Affected versions
- shim
Version range not reported
- shim-signed
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- shim
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- shim
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- shim
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- shim
Version range not reported
- shim
Version range not reported
- shim
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- shim
Version range not reported
- shim
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- shim
Version range not reported
- shim-unsigned-x64
Version range not reported
- shim
Version range not reported
- shim
Version range not reported
- shim-unsigned-aarch64
Version range not reported
- shim-unsigned-x64
Version range not reported
- shim
Version range not reported