Vulnerability Name:

CVE-2021-45756 (CCN-222485)

Assigned:2021-12-21
Published:2021-12-21
Updated:2022-03-29
Summary:Asus RT-AC68U <3.0.0.4.385.20633 and RT-AC5300 <3.0.0.4.384.82072 are affected by a buffer overflow in blocking_request.cgi.
CVSS v3 Severity:9.8 Critical (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
8.8 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C)
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): High
Integrity (I): High
Availibility (A): High
9.8 Critical (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
8.8 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C)
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): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:7.5 High (CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
10.0 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-120
Vulnerability Consequences:Gain Access
References:Source: MISC
Type: Vendor Advisory
http://asus.com

Source: MITRE
Type: CNA
CVE-2021-45756

Source: MISC
Type: Broken Link
http://rt-ac68u.com

Source: XF
Type: UNKNOWN
asus-cve202145756-bo(222485)

Source: CCN
Type: Asus GIT Repository
Asus

Source: MISC
Type: Exploit, Third Party Advisory
https://github.com/IBUILI/Asus

Source: CCN
Type: Asus Web site
Asus RT-AC68U

Source: CCN
Type: Asus Web site
Asus RT-AC5300

Vulnerable Configuration:Configuration 1:
  • cpe:/o:asus:rt-ac68u_firmware:*:*:*:*:*:*:*:* (Version < 3.0.0.4.385.20633)
  • AND
  • cpe:/h:asus:rt-ac68u:-:*:*:*:*:*:*:*

    • Configuration 2:
  • cpe:/o:asus:rt-ac5300_firmware:*:*:*:*:*:*:*:* (Version < 3.0.0.4.384.82072)
  • AND
  • cpe:/h:asus:rt-ac5300:-:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/h:asus:rt-ac68u:-:*:*:*:*:*:*:*
  • OR cpe:/h:asus:rt-ac5300:-:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    asus rt-ac68u firmware *
    asus rt-ac68u -
    asus rt-ac5300 firmware *
    asus rt-ac5300 -
    asus rt-ac68u -
    asus rt-ac5300 -