Auth bypass in Xiongmaitech Ahb7008t-Mh-V2
CVE-2021-41506
Xiaongmai AHB7008T-MH-V2, AHB7804R-ELS, AHB7804R-MH-V2, AHB7808R-MS-V2, AHB7808R-MS, AHB7808T-MS-V2, AHB7804R-LMS, HI3518_50H10L_S39 V4.02.R11.7601.Nat.Onvif.20170420, V4.02.R11.Nat.Onvif.20160422, V4.02.R11.7601.Nat.Onvif.20170424, V4.02.R11.Nat.Onvif.20170327, V4.02.R11.Nat.Onvif.20161205, V4.02.R11.Nat.20170301, V4.02.R12.Nat.OnvifS.20170727 is affected by a backdoor in the macGuarder and dvrHelper binaries of DVR/NVR/IP camera firmware due to static root account credentials in the system.
Vulnerability class: Broken Authentication
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: 0.023 (82.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 82.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: +0.001
Affected products
- Xiongmaitech Ahb7008t-Mh-V2
- Xiongmaitech Ahb7008t-Mh-V2 Firmware — versions 4.02.r11.7601.nat.onvif.20170420
- Xiongmaitech Ahb7804r-Els
- Xiongmaitech Ahb7804r-Els Firmware — versions 4.02.r11.nat.onvif.20160422
- Xiongmaitech Ahb7804r-Lms
- Xiongmaitech Ahb7804r-Lms Firmware — versions 4.02.r11.nat.20170301
- Xiongmaitech Ahb7804r-Mh-V2
- Xiongmaitech Ahb7804r-Mh-V2 Firmware — versions 4.02.r11.7601.nat.onvif.20170424
- Xiongmaitech Ahb7808r-Ms
- Xiongmaitech Ahb7808r-Ms Firmware — versions 4.02.r11.nat.onvif.20160328
Weakness classification (CWE)
References
- habr.com/en/post/486856/ (Exploit, Third Party Advisory)
- www.xiongmaitech.com/en/index.php/news/info/12/68 (Vendor Advisory)
- github.com/Snawoot/hisilicon-dvr-telnet (Third Party Advisory)
- github.com/tothi/hs-dvr-telnet (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-41506?
- CVE-2021-41506 is a critical-severity vulnerability in Xiongmaitech Ahb7008t-Mh-V2, classified under Improper Authentication. CVSS score: 9.8/10. Published 2022-06-30.
- How severe is CVE-2021-41506?
- Critical severity. CVSS v3 base score is 9.8 out of 10.