Vulnerability Name:

CVE-2022-38956 (CCN-236778)

Assigned:2022-08-27
Published:2022-08-27
Updated:2022-09-22
Summary:An exploitable firmware downgrade vulnerability was discovered on the Netgear WPN824EXT WiFi Range Extender. An attacker can conduct a MITM attack to replace the user-uploaded firmware image with an original old firmware image. This affects Firmware 1.1.1_1.1.9 and earlier.
CVSS v3 Severity:5.3 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N)
4.7 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:U/RC:R)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
9.1 Critical (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H)
8.0 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H/E:U/RL:U/RC:R)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:9.4 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-354
Vulnerability Consequences:Gain Access
References:Source: MITRE
Type: CNA
CVE-2022-38956

Source: XF
Type: UNKNOWN
netgear-cve202238956-mitm(236778)

Source: CCN
Type: HackMD Web site
Two vulnerabilities regarding firmware updates in Netgear WPN824EXT WiFi Range Extender

Source: MISC
Type: Exploit, Third Party Advisory
https://hackmd.io/@eupX2KdkT6iNpqJUWk9p4A/SyAnOSd1s

Source: CCN
Type: Netgear Web site
Netgear

Source: MISC
Type: Vendor Advisory
https://www.netgear.com/about/security/

Vulnerable Configuration:Configuration 1:
  • cpe:/o:netgear:wpn824ext_firmware:*:*:*:*:*:*:*:* (Version <= 1.1.1_1.1.9)
  • AND
  • cpe:/h:netgear:wpn824ext:-:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    netgear wpn824ext firmware *
    netgear wpn824ext -