Auth bypass in Magicjack A921
CVE-2023-30024
The MagicJack device, a VoIP solution for internet phone calls, contains a hidden NAND flash memory partition allowing unauthorized read/write access. Attackers can exploit this by replacing the original software with a malicious version, leading to ransomware deployment on the host computer. Affected devices have firmware versions prior to magicJack A921 USB Phone Jack Rev 3.0 V1.4.
Vulnerability class: Privilege Escalation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.6 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (38.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 38.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Magicjack A921 — versions 3.0
- Magicjack A921 Firmware — versions 1.4
Weakness classification (CWE)
References
- www.magicjack.com/ (Product)
- pastebin.com/raw/irWcawp8 (Third Party Advisory)
- drive.google.com/drive/folders/1cKd8hksThK610GPtBQ3du8DEkwKywlAi (Exploit)
- samuraisecurity.co.uk/red-teaming-0x01-click-rce-via-voip-usb/ (Technical Description, Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-30024?
- CVE-2023-30024 is a medium-severity vulnerability in Magicjack A921, classified under Improper Privilege Management. CVSS score: 6.6/10. Published 2023-04-28.
- How severe is CVE-2023-30024?
- Medium severity. CVSS v3 base score is 6.6 out of 10.