Buffer overflow in Zavio B8220
CVE-2023-3959
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. While processing 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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.488 (98.8th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 99th percentile — 98.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.404 · newest: 0.488 · change: +0.084
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
- www.cisa.gov/news-events/ics-advisories/icsa-23-304-03 (US Government Resource, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-3959?
- CVE-2023-3959 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-2023-3959?
- Critical severity. CVSS v3 base score is 9.8 out of 10.