Memory corruption via unterminated DHCP hostname option
Published Nov 9, 2021 · Updated Aug 3, 2024
Memory corruption in Siemens Nucleus RTOS DHCP clients allows adjacent attackers to read or write memory or interrupt service. The client assumes DHCP Hostname option data is null-terminated and reads or writes beyond its boundary when the global hostname is undefined. Exploitation requires a crafted DHCP response on the local network and an enabled DHCP client, which is disabled by default on APOGEE, TALON, and Desigo products.
Summary
What happened
Memory corruption in Siemens Nucleus RTOS DHCP clients allows adjacent attackers to read or write memory or interrupt service. The client assumes DHCP Hostname option data is null-terminated and reads or writes beyond its boundary when the global hostname is undefined. Exploitation requires a crafted DHCP response on the local network and an enabled DHCP client, which is disabled by default on APOGEE, TALON, and Desigo products.
The record
- CVE
- CVE-2021-31884
- Published
- Nov 9, 2021
- Updated
- Aug 3, 2024
- Vendor
- Siemens
- Product
- Capital VSTAR
- Classifications
- CWE-170, T1557.003
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Nov 9, 2021CVE 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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- Affected versionversion=All versions with enabled Ethernet options
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What is affected?
Published CVSS scores
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Attacks
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Technologies
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Your stack
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