CVE-2023-23363

EUVD-2023-27463

22.09.2023, 04:15

A buffer copy without checking size of input vulnerability has been reported to affect QNAP operating system. If exploited, the vulnerability possibly allows remote users to execute code via unspecified vectors.

We have already fixed the vulnerability in the following versions:
QTS 4.3.6.2441 build 20230621 and later
QTS 4.3.3.2420 build 20230621 and later
QTS 4.2.6 build 20230621 and later
QTS 4.3.4.2451 build 20230621 and later

Classic Buffer Overflow

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	8.1 HIGH	NETWORK	HIGH	NONE	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
qnap	CNA	8.1 HIGH	NETWORK	HIGH	NONE	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Base Score

CVSS 3.x

EPSS Score

Percentile: 70%

Affected Products (NVD)

Vendor	Product	Version
qnap	qts	4.3.3 ≤ 𝑥 < 4.3.3.2420
qnap	qts	4.3.4 ≤ 𝑥 < 4.3.4.245
qnap	qts	4.3.6 ≤ 𝑥 < 4.3.6.2441

𝑥

= Vulnerable software versions

Common Weakness Enumeration

CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
The program copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.

References

https://www.qnap.com/en/security-advisory/qsa-23-25