CVE-2022-45460
Published: 28 March 2023
Summary
CVE-2022-45460 is a critical-severity Out-of-bounds Write (CWE-787) vulnerability in Xiongmaitech Nbd6808T-Pl Firmware. Its CVSS base score is 9.8 (Critical).
Operationally, ranked in the top 1.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
CVE-2022-45460 is a stack-based buffer overflow vulnerability present in the web server of multiple Xiongmai NVR devices, including MBD6304T V4.02.R11.00000117.10001.131900.00000 and NBD6808T-PL V4.02.R11.C7431119.12001.130000.00000. The root cause is unsafe handling of a long URI passed to a sprintf call, which can be triggered remotely over HTTP and is tracked under CWE-787. The issue is distinct from CVE-2018-10088 but may overlap with CVE-2017-16725.
An unauthenticated attacker with network access can send a specially crafted HTTP request to trigger the overflow. Successful exploitation yields arbitrary code execution with full system impact, while even a partial trigger crashes the web server and forces a device reboot. The vulnerability carries a CVSS 3.1 score of 9.8, reflecting an attack that requires no authentication, user interaction, or special conditions.
Public references include a functional exploit script targeting HiSilicon-based DVR/NVR platforms and a VulnCheck advisory that details the URI overflow condition. The associated EPSS score currently stands at 0.5528 with a recorded peak of 0.5852, indicating sustained exploitation interest after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2022-48328
Vulnerability details
Multiple Xiongmai NVR devices, including MBD6304T V4.02.R11.00000117.10001.131900.00000 and NBD6808T-PL V4.02.R11.C7431119.12001.130000.00000, allow an unauthenticated and remote user to exploit a stack-based buffer overflow and crash the web server, resulting in a system reboot. An unauthenticated and remote attacker can execute arbitrary…
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code by sending a crafted HTTP request that triggers the overflow condition via a long URI passed to a sprintf call. NOTE: this is different than CVE-2018-10088, but this may overlap CVE-2017-16725.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
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.
Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.