What is CVE-2020-7877?

CVE-2020-7877 is a high-severity vulnerability in Mastersoft Zook Agent, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.0/10. Published 2021-09-07.

How severe is CVE-2020-7877?

High severity. CVSS v3 base score is 8.0 out of 10.

Buffer overflow in Mastersoft Zook Agent

CVE-2020-7877

A buffer overflow issue was discovered in ZOOK solution(remote administration tool) through processing 'ConnectMe' command while parsing a crafted OUTERIP value because of missing boundary check. This vulnerability allows the attacker to execute remote arbitrary command.

Vulnerability class: Buffer Overflow

EPSS: 0.008 (53.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.

Affected products

Mastersoft Zook_agent — versions 2.0.6.1
Mastersoft Zookagentsetup.exe — versions 2.0.6.1
Mastersoft Zook_viewer — versions 2.0.4.6
Mastersoft Zookviewer_setup.exe — versions 2.0.4.6
Microsoft Windows

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

vuln@krcert.or.kr (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2020-7877?: CVE-2020-7877 is a high-severity vulnerability in Mastersoft Zook Agent, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.0/10. Published 2021-09-07.
How severe is CVE-2020-7877?: High severity. CVSS v3 base score is 8.0 out of 10.