CVE-2020-24214

CRITICAL

HiSilicon IPTV/H.264/H.265 Video Encoders - Unauthenticated Denial of Service via RTSP Request Buffer Overflow

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2020-24214. PoCs published by Alexei Kojenov.

AI-analyzed exploit summary This exploit targets a buffer overflow vulnerability in HiSilicon-based video encoders via unauthenticated RTSP requests. It sends a malformed OPTIONS request with an excessively long CSeq header to trigger a DoS condition.

Description

An issue was discovered in the box application on HiSilicon based IPTV/H.264/H.265 video encoders. Attackers can send a crafted unauthenticated RTSP request to cause a buffer overflow and application crash. The device will not be able to perform its main purpose of video encoding and streaming for up to a minute, until it automatically reboots. Attackers can send malicious requests once a minute, effectively disabling the device.

Exploits (1)

exploitdb WORKING POC
by Alexei Kojenov · bashwebappshardware
https://www.exploit-db.com/exploits/48903

This exploit targets a buffer overflow vulnerability in HiSilicon-based video encoders via unauthenticated RTSP requests. It sends a malformed OPTIONS request with an excessively long CSeq header to trigger a DoS condition.

Classification
Working Poc 95%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: HiSilicon video encoders (vendor-specific, e.g., URayTech, J-Tech Digital, ProVideoInstruments)
No auth needed
Prerequisites: Network access to the RTSP port of the target device
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Third Party Advisory, US Government Resource x_refsource_misc
https://www.kb.cert.org/vuls/id/896979
Exploit, Third Party Advisory x_refsource_misc
https://kojenov.com/2020-09-15-hisilicon-encoder-vulnerabilities/

Scores

CVSS v3 9.8
EPSS 0.3539
EPSS Percentile 98.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

Status published
Products (7)
jtechdigital/h.264_iptv_encoder_1080p\@60hz_firmware
provideoinstruments/vecaster-4k-hevc_firmware
provideoinstruments/vecaster-hd-h264_firmware
provideoinstruments/vecaster-hd-hevc_firmware
provideoinstruments/vecaster-hd-sdi_firmware
szuray/iptv\/h.264_video_encoder_firmware
szuray/iptv\/h.265_video_encoder_firmware
Published Oct 06, 2020
Tracked Since Feb 18, 2026