Root code execution via unchecked action handling
Published Sep 13, 2021 · Updated Sep 17, 2024
Stack-based buffer overflow in Geutebrück G-Cam E2 and G-Code firmware allows remote authenticated users to execute code as root. The instantrec.cgi handler performs string manipulation on the action parameter without checking its length, overflowing a stack buffer used by the CGI process. Direct exploitation requires administrator access, while a separate authentication bypass exposes the endpoint without credentials on some firmware configurations.
Summary
What happened
Stack-based buffer overflow in Geutebrück G-Cam E2 and G-Code firmware allows remote authenticated users to execute code as root. The instantrec.cgi handler performs string manipulation on the action parameter without checking its length, overflowing a stack buffer used by the CGI process. Direct exploitation requires administrator access, while a separate authentication bypass exposes the endpoint without credentials on some firmware configurations.
The record
- CVE
- CVE-2021-33549
- Published
- Sep 13, 2021
- Updated
- Sep 17, 2024
- Vendor
- Geutebrück
- Product
- G-Cam/E2 Series
- Classifications
- CWE-121, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 13, 2021CVE publishedPublication date reported by the CVE source.
- Sep 17, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=EBC-21xx <=1.12.0.27
- Affected versionversion=EBC-21xx 1.12.13.2
- Affected versionversion=EBC-21xx 1.12.14.5
- Affected versionversion=EFD-22xx <=1.12.0.27
- Affected versionversion=EFD-22xx 1.12.13.2
- Affected versionversion=EFD-22xx 1.12.14.5
- Affected versionversion=ETHC-22xx <=1.12.0.27
- Affected versionversion=ETHC-22xx 1.12.13.2
- Affected versionversion=ETHC-22xx 1.12.14.5
- Affected versionversion=EWPC-22xx <=1.12.0.27
- Affected versionversion=EWPC-22xx 1.12.13.2
- Affected versionversion=EWPC-22xx 1.12.14.5
What conditions does exploitation require?
What is affected?
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.
Weakness, pattern, technique
Public exploit references
- Geutebruck instantrec Remote Command Executionfunctional · validated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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