Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSummary
CVE-2024-39349 is a critical-severity Classic Buffer Overflow (CWE-120) vulnerability in Synology Bc500 Firmware. Its CVSS base score is 9.8 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked in the top 29% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SI-10 (Information Input Validation) — see the control section below for these in your framework.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
A classic buffer overflow vulnerability exists in the libjansson component shipped with Synology Camera Firmware on BC500 and TC500 models. The flaw, tracked as CVE-2024-39349, is specific to Synology's integration and does not affect the upstream jansson library. It impacts all firmware versions prior to 1.0.7-0298 and carries a CVSS 3.1 score of 9.8.
Remote attackers can exploit the issue over the network without authentication or user interaction to execute arbitrary code. The attack vector is described only as unspecified, but successful exploitation would grant full control over the affected camera device.
Synology's security advisory Synology_SA_23_15 recommends updating BC500 and TC500 devices to firmware 1.0.7-0298 or later to address the vulnerability. The associated EPSS score rose from low values after disclosure to a peak of 0.0845 on 2025-12-11 before receding to the current 0.0439, indicating a period of increased exploitation interest.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2024-37912
Vulnerability Data
A vulnerability regarding buffer copy without checking size of input ('Classic Buffer Overflow') is found in the libjansson component and it does not affect the upstream library. This allows remote attackers to execute arbitrary code via unspecified vectors. The following…
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models with Synology Camera Firmware versions before 1.0.7-0298 may be affected: BC500 and TC500.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
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V5.2.1
Mitigating Controls (NIST 800-53 r5) AI
Developer testing and analysis can find missing size checks before deployment.
Input validation directly enforces size checks before buffer copies.
Engineering principles require bounds checking and safe buffer handling in design.
Memory protection limits the impact of an overflow once it occurs.
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.
Secure development practices directly enforce bounds checking and input validation that prevent classic buffer overflows.
Vulnerability identification processes such as code review or scanning detect classic buffer overflows before exploitation.
Routine patching replaces vulnerable code containing unchecked buffer copies with corrected versions.
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.
Secure coding directly requires bounds-checked memory operations, addressing the root cause of CWE-120.
Security testing in development and acceptance can detect buffer overflows through fuzzing and static analysis, though it does not prevent them at the source.
Secure development life cycle mandates processes that can include input validation and bounds checking to prevent buffer overflows.
Application security requirements can specify input-size validation and safe buffer handling to mitigate classic buffer overflows.
Secure system architecture and engineering principles promote defensive coding patterns that reduce the likelihood of unchecked buffer copies.