Persistent boot code execution via memory injection
Published Nov 10, 2022 · Updated Aug 3, 2024
Secure boot bypass in Cisco ASA and FTD Software on Secure Firewall 3100 devices allows physically proximate attackers to execute persistent boot code. A boot-process logic error accepts malicious code injected into a specific memory location, allowing it to execute at boot and break the chain of trust. Physical access to an affected 3100 device during boot is required, and successful exploitation establishes persistent code execution before normal startup.
Summary
What happened
Secure boot bypass in Cisco ASA and FTD Software on Secure Firewall 3100 devices allows physically proximate attackers to execute persistent boot code. A boot-process logic error accepts malicious code injected into a specific memory location, allowing it to execute at boot and break the chain of trust. Physical access to an affected 3100 device during boot is required, and successful exploitation establishes persistent code execution before normal startup.
The record
- CVE
- CVE-2022-20826
- Published
- Nov 10, 2022
- Updated
- Aug 3, 2024
- Vendor
- ClamAV
- Product
- Cisco Adaptive Security Appliance (ASA) Software
- Classifications
- CWE-501, T1542
- Attack vector
- physical
- Privileges
- unauthenticated
Timeline
How it unfolded
- Nov 10, 2022CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=9.17.1
- Affected versionversion=9.17.1.10
- Affected versionversion=9.17.1.13
- Affected versionversion=9.17.1.9
- Affected versionversion=9.18.1
- Affected versionversion=9.18.1.3
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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