Vulnerability Name:

CVE-2017-6795 (CCN-131505)

Assigned:2017-09-06
Published:2017-09-06
Updated:2019-10-09
Summary:A vulnerability in the USB-modem code of Cisco IOS XE Software running on Cisco ASR 920 Series Aggregation Services Routers could allow an authenticated, local attacker to overwrite arbitrary files on the underlying operating system of an affected device. The vulnerability is due to improper input validation of the platform usb modem command in the CLI of the affected software. An attacker could exploit this vulnerability by modifying the platform usb modem command in the CLI of an affected device. A successful exploit could allow the attacker to overwrite arbitrary files on the underlying operating system of an affected device. Cisco Bug IDs: CSCvf10783.
CVSS v3 Severity:4.4 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N)
3.9 Low (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
4.4 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N)
3.9 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
CVSS v2 Severity:4.7 Medium (CVSS v2 Vector: AV:L/AC:M/Au:N/C:N/I:C/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Complete
Availibility (A): None
4.6 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:N/I:C/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): Complete
Availibility (A): None
Vulnerability Type:CWE-20
Vulnerability Consequences:File Manipulation
References:Source: MITRE
Type: CNA
CVE-2017-6795

Source: BID
Type: Third Party Advisory, VDB Entry
100656

Source: CCN
Type: BID-100656
Cisco ASR 920 Series Routers CVE-2017-6795 Local Arbitrary File Overwrite Vulnerability

Source: SECTRACK
Type: Third Party Advisory, VDB Entry
1039282

Source: XF
Type: UNKNOWN
cisco-asr-cve20176795-file-overwrite(131505)

Source: CCN
Type: Cisco Security Advisory cisco-sa-20170906-asr920-2
Cisco IOS XE Software for Cisco ASR 920 Series Routers Arbitrary File Overwrite Vulnerability

Source: CONFIRM
Type: Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170906-asr920-2

Vulnerable Configuration:Configuration 1:
  • cpe:/o:cisco:ios_xe:-:*:*:*:*:*:*:*
  • AND
  • cpe:/h:cisco:asr-920-10sz-pd:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr-920-12cz-a:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr-920-12sz-im:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr-920-24sz-im:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr-920-24sz-m:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr-920-24tz-m:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr-920-4sz-d:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr-920-12cz-d:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr-920-4sz-a:-:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    cisco ios xe -
    cisco asr-920-10sz-pd -
    cisco asr-920-12cz-a -
    cisco asr-920-12sz-im -
    cisco asr-920-24sz-im -
    cisco asr-920-24sz-m -
    cisco asr-920-24tz-m -
    cisco asr-920-4sz-d -
    cisco asr-920-12cz-d -
    cisco asr-920-4sz-a -