Vulnerability Name:

CVE-2020-3477 (CCN-188779)

Assigned:2019-12-12
Published:2019-12-12
Updated:2021-08-06
Summary:A vulnerability in the CLI parser of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, local attacker to access files from the flash: filesystem. The vulnerability is due to insufficient application of restrictions during the execution of a specific command. An attacker could exploit this vulnerability by using a specific command at the command line. A successful exploit could allow the attacker to obtain read-only access to files that are located on the flash: filesystem that otherwise might not have been accessible.
CVSS v3 Severity:5.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N)
4.8 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): None
Availibility (A): None
5.5 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N)
4.8 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): None
Availibility (A): None
CVSS v2 Severity:2.1 Low (CVSS v2 Vector: AV:L/AC:L/Au:N/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
4.6 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:C/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): None
Availibility (A): None
Vulnerability Type:CWE-863
Vulnerability Consequences:Obtain Information
References:Source: MITRE
Type: CNA
CVE-2020-3477

Source: XF
Type: UNKNOWN
cisco-cve20203477-info-disc(188779)

Source: CCN
Type: Cisco Security Advisory cisco-sa-info-disclosure-V4BmJBNF
Cisco IOS and IOS XE Software Information Disclosure Vulnerability

Source: CISCO
Type: Vendor Advisory
20200924 Cisco IOS and IOS XE Software Information Disclosure Vulnerability

Vulnerable Configuration:Configuration 1:
  • cpe:/o:cisco:ios:16.3.11:*:*:*:*:*:*:*
  • AND
  • cpe:/h:cisco:2610xm:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:2611xm:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:2612:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:2620xm:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:2621xm:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:2650xm:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:2651xm:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:2691:-:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/o:cisco:ios_software:*:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe_software:*:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    cisco ios 16.3.11
    cisco 2610xm -
    cisco 2611xm -
    cisco 2612 -
    cisco 2620xm -
    cisco 2621xm -
    cisco 2650xm -
    cisco 2651xm -
    cisco 2691 -
    cisco ios software *
    cisco ios xe software *