Cyber Resilience

CVE-2023-33629

Memory Safety in H3C Magic R300-2100M Firmware r300-2100mv100r004

Memory Safety
Published
31 May 2023
Modified
10 January 2025
CVSS Score v3.1 7.2
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.044 90th percentile
Risk Priority 79 floored blend · peak EPSS

Summary

CVE-2023-33629 is a high-severity Out-of-bounds Write (CWE-787) vulnerability in H3C Magic R300-2100M Firmware. Its CVSS base score is 7.2 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked in the top 10% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

H3C Magic R300 firmware version R300-2100MV100R004 contains a stack-based buffer overflow vulnerability reachable through the DeltriggerList interface at the /goform/aspForm endpoint. The flaw is tracked as CVE-2023-33629, carries a CVSS 3.1 score of 7.2, and is classified under CWE-787 as an out-of-bounds write.

An attacker with administrative credentials can send a crafted HTTP request to the affected endpoint and trigger the overflow. Successful exploitation grants the ability to execute arbitrary code or crash the device, resulting in full compromise of confidentiality, integrity, and availability on the router.

Public technical notes at the referenced HackMD pages describe the vulnerability discovery but do not include vendor patch information or mitigation steps. The current EPSS score of 0.8770, with a recorded peak of 0.8814, indicates sustained exploitation interest following disclosure.

EU & UK References

Vulnerability Data

H3C Magic R300 version R300-2100MV100R004 was discovered to contain a stack overflow via the DeltriggerList interface at /goform/aspForm.

CWE(s)
CWE-787

Related Threats

MITRE ATT&CK Enterprise Techniques

T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
T1210 Exploitation of Remote Services Lateral Movement
Adversaries may exploit remote services to gain unauthorized access to internal systems once inside of a network.
attack.mitre.org →
T1211 Exploitation for Stealth Stealth
Adversaries may exploit vulnerabilities to evade detection by hiding activity, suppressing logging, or operating within trusted or unmonitored components.
attack.mitre.org →
T1212 Exploitation for Credential Access Credential Access
Adversaries may exploit software vulnerabilities in an attempt to collect credentials.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2023-33635Same product: H3C Magic R300-2100M
CVE-2023-33628Same product: H3C Magic R300-2100M
CVE-2023-33633Same product: H3C Magic R300-2100M
CVE-2023-33630Same product: H3C Magic R300-2100M
CVE-2023-33638Same product: H3C Magic R300-2100M
CVE-2023-33636Same product: H3C Magic R300-2100M
CVE-2023-33639Same product: H3C Magic R300-2100M
CVE-2023-33637Same product: H3C Magic R300-2100M
CVE-2023-33640Same product: H3C Magic R300-2100M
CVE-2023-33627Same product: H3C Magic R300-2100M

Affected Assets

h3c
magic r300-2100m firmware
r300-2100mv100r004

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-16 Memory Protection
addresses: CWE-787

Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure-development practices (static analysis, bounds checking, code review) are the primary means of preventing out-of-bounds writes.

ID.RA-01 partial match
prevents

Vulnerability scanning and recording can discover out-of-bounds write flaws so they can be remediated.

PR.PS-02 partial match
prevents

Patching or replacing vulnerable software directly eliminates known instances of this coding weakness.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing in development and acceptance can detect and prevent out-of-bounds write defects.

A.8.25 Secure development life cycle partial match
prevents

Secure development life cycle mandates practices that prevent out-of-bounds writes.

A.8.26 Application security requirements partial match
prevents

Application security requirements can specify bounds-checking and safe memory handling.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture and engineering principles reduce the likelihood of buffer overflows.

A.8.28 Secure coding partial match
prevents

Secure coding directly addresses out-of-bounds writes through language choice and coding standards.

A.8.32 Change management partial match
prevents

Change management can enforce review gates that catch unsafe memory operations before deployment.

References