CVE-2021-45527

26.12.2021, 01:15

Certain NETGEAR devices are affected by a buffer overflow by an authenticated user. This affects D6220 before 1.0.0.68, D6400 before 1.0.0.102, D7000v2 before 1.0.0.66, D8500 before 1.0.3.58, DC112A before 1.0.0.54, EX7000 before 1.0.1.94, EX7500 before 1.0.0.72, R6250 before 1.0.4.48, R6300v2 before 1.0.4.52, R6400 before 1.0.1.70, R6400v2 before 1.0.4.102, R6700v3 before 1.0.4.102, R7000 before 1.0.11.116, R7100LG before 1.0.0.64, R7850 before 1.0.5.68, R7900 before 1.0.4.30, R7960P before 1.4.1.68, R8000 before 1.0.4.52, RAX200 before 1.0.2.88, RBS40V before 2.6.2.4, RS400 before 1.5.1.80, XR300 before 1.0.3.56, R7000P before 1.3.2.124, R8000P before 1.4.1.68, R8500 before 1.0.2.144, RAX80 before 1.0.3.102, R6900P before 1.3.2.124, R7900P before 1.4.1.68, R8300 before 1.0.2.144, RAX75 before 1.0.3.102, RBR750 before 3.2.17.12, RBR850 before 3.2.17.12, RBS750 before 3.2.17.12, RBS850 before 3.2.17.12, RBK752 before 3.2.17.12, and RBK852 before 3.2.17.12.

Classic Buffer Overflow

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	NIST	9.6 CRITICAL	ADJACENT_NETWORK	LOW	NONE	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
mitre	CNA	9.6 CRITICAL	ADJACENT_NETWORK	LOW	NONE	CVSS:3.1/AC:L/AV:A/A:H/C:H/I:H/PR:N/S:C/UI:N
CVE	ADP	---				---

Base Score

CVSS 3.x

EPSS Score

Percentile: 78%

Vendor	Product	Version
netgear	rbk752_firmware	𝑥 < 3.2.17.12
netgear	rbr750_firmware	𝑥 < 3.2.17.12
netgear	rbs750_firmware	𝑥 < 3.2.17.12
netgear	rbk852_firmware	𝑥 < 3.2.17.12
netgear	rbr850_firmware	𝑥 < 3.2.17.12
netgear	rbs850_firmware	𝑥 < 3.2.17.12
netgear	d6220_firmware	𝑥 < 1.0.0.68
netgear	d6400_firmware	𝑥 < 1.0.0.102
netgear	d7000v2_firmware	𝑥 < 1.0.0.66
netgear	d8500_firmware	𝑥 < 1.0.3.58
netgear	dc112a_firmware	𝑥 < 1.0.0.54
netgear	ex7000_firmware	𝑥 < 1.0.1.94
netgear	ex7500_firmware	𝑥 < 1.0.0.72
netgear	r6250_firmware	𝑥 < 1.0.4.48
netgear	r6300v2_firmware	𝑥 < 1.0.4.52
netgear	r6400_firmware	𝑥 < 1.0.1.70
netgear	r6400v2_firmware	𝑥 < 1.0.4.102
netgear	r6700v3_firmware	𝑥 < 1.0.4.102
netgear	r7000_firmware	𝑥 < 1.0.11.116
netgear	r7100lg_firmware	𝑥 < 1.0.0.64
netgear	r7850_firmware	𝑥 < 1.0.5.68
netgear	r7900_firmware	𝑥 < 1.0.4.30
netgear	r7960p_firmware	𝑥 < 1.4.1.68
netgear	r8000_firmware	𝑥 < 1.0.4.52
netgear	rax200_firmware	𝑥 < 1.0.2.88
netgear	rax75_firmware	𝑥 < 1.0.3.102
netgear	rax80_firmware	𝑥 < 1.0.3.102
netgear	rbs40v_firmware	𝑥 < 2.6.2.4
netgear	xr300_firmware	𝑥 < 1.0.3.56
netgear	rs400_firmware	𝑥 < 1.5.1.80
netgear	r7000p_firmware	𝑥 < 1.3.2.124
netgear	r8000p_firmware	𝑥 < 1.4.1.68
netgear	r8500_firmware	𝑥 < 1.0.2.144
netgear	r6900p_firmware	𝑥 < 1.3.2.124
netgear	r7900p_firmware	𝑥 < 1.4.1.68
netgear	r8300_firmware	𝑥 < 1.0.2.144

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://kb.netgear.com/000064493/Security-Advisory-for-Post-Authentication-Buffer-Overflow-on-Some-Routers-Extenders-and-WiFi-Systems-PSV-2020-0437