Buffer overflow in Zavio B8220
CVE-2023-43755
Zavio CF7500, CF7300, CF7201, CF7501, CB3211, CB3212, CB5220, CB6231, B8520, B8220, and CD321 IP Cameras with firmware version M2.1.6.05 are vulnerable to multiple instances of stack-based overflows. During the processing and parsing of certain fields in XML elements from incoming network requests, the product does not sufficiently check or validate allocated buffer size. This may lead to remote code execution.
Vulnerability class: Buffer Overflow
EPSS: 0.013 (66.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Zavio B8220
- Zavio B8220_firmware — versions m2.1.6.05
- Zavio B8520
- Zavio B8520_firmware — versions m2.1.6.05
- Zavio Cb3211
- Zavio Cb3211_firmware — versions m2.1.6.05
- Zavio Cb3212
- Zavio Cb3212_firmware — versions m2.1.6.05
- Zavio Cb5220
- Zavio Cb5220_firmware — versions m2.1.6.05
Weakness classification (CWE)
References
- ics-cert@hq.dhs.gov (US Government Resource, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-43755?
- CVE-2023-43755 is a critical-severity vulnerability in Zavio B8220, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2023-11-08.
- How severe is CVE-2023-43755?
- Critical severity. CVSS v3 base score is 9.8 out of 10.