Vulnerability · Published Feb 27, 2020 · Assigned by twcert

CVE-2020-3924TONNET DVR – Firmware Injection

Medium 6.4

In plain English

A medium-severity security flaw in DVR from TONNET. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 70% of all known vulnerabilities).

Severity (CVSS 3.1)6.4Medium

Exploit odds (30 days)1.3%top 30.3% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

DVR firmware in TAT-76 and TAT-77 series of products, provided by TONNET do not properly verify patch files. Attackers can inject a specific command into a patch file and gain access to the system.

Affected products (as reported)

Vendor	Product	Versions
TONNET	DVR	0 – through 20191216
TONNET	DVR	0 – through 20200213

References

https://www.chtsecurity.com/news/4ef5eb3a-fdc3-4d78-8dd7-ec7213e2bbcf x_refsource_MISC
https://tvn.twcert.org.tw/taiwanvn/TVN-201910004 x_refsource_MISC