Vulnerability Name:

CVE-2020-15635 (CCN-186278)

Assigned:2020-08-04
Published:2020-08-04
Updated:2020-08-24
Summary:This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6700 V1.0.4.84_10.0.58 routers with firmware 1.0.4.84_10.0.58. Authentication is not required to exploit this vulnerability. The specific flaw exists within the acsd service, which listens on TCP port 5916 by default. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the admin user. Was ZDI-CAN-9853.
CVSS v3 Severity:8.8 High (CVSS v3.1 Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
7.7 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
8.8 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
7.7 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:8.3 High (CVSS v2 Vector: AV:A/AC:L/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Adjacent_Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
8.3 High (CCN CVSS v2 Vector: AV:A/AC:L/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Adjacent_Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-121
Vulnerability Consequences:Gain Access
References:Source: MITRE
Type: CNA
CVE-2020-15635

Source: XF
Type: UNKNOWN
netgear-cve202015635-bo(186278)

Source: CCN
Type: Netgear Web site
Security Advisory for Pre-Authentication Buffer Overflow on R6700v3, PSV-2020-0202

Source: MISC
Type: Vendor Advisory
https://kb.netgear.com/000062127/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-R6700v3-PSV-2020-0202

Source: CCN
Type: ZDI-20-936
NETGEAR R6700 acsd Stack-based Buffer Overflow Remote Code Execution Vulnerability

Source: MISC
Type: Third Party Advisory, VDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-20-936/

Vulnerable Configuration:Configuration 1:
  • cpe:/o:netgear:r6700_firmware:*:*:*:*:*:*:*:* (Version < 1.0.4.98)
  • AND
  • cpe:/h:netgear:r6700:v3:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    netgear r6700 firmware *
    netgear r6700 v3