Vulnerability Name:

CVE-2016-6438 (CCN-117763)

Assigned:2016-10-12
Published:2016-10-12
Updated:2017-07-29
Summary:A vulnerability in Cisco IOS XE Software running on Cisco cBR-8 Converged Broadband Routers could allow an unauthenticated, remote attacker to cause a configuration integrity change to the vty line configuration on an affected device. This vulnerability affects the following releases of Cisco IOS XE Software running on Cisco cBR-8 Converged Broadband Routers: All 3.16S releases, All 3.17S releases, Release 3.18.0S, Release 3.18.1S, Release 3.18.0SP. More Information: CSCuz62815. Known Affected Releases: 15.5(3)S2.9, 15.6(2)SP. Known Fixed Releases: 15.6(1.7)SP1, 16.4(0.183), 16.5(0.1).
CVSS v3 Severity:5.9 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N)
5.2 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
4.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/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): None
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-264
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2016-6438

Source: BID
Type: UNKNOWN
93518

Source: SECTRACK
Type: UNKNOWN
1037003

Source: XF
Type: UNKNOWN
ciscoiosxe-cve20166438-sec-bypass(117763)

Source: CCN
Type: Cisco Security Advisory cisco-sa-20161012-cbr-8
Cisco cBR-8 Converged Broadband Router vty Integrity Vulnerability

Source: CONFIRM
Type: Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161012-cbr-8

Vulnerable Configuration:Configuration 1:
  • cpe:/o:cisco:ios_xe:3.16.0cs:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.16.0s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.16.1as:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.16.1s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.16.2as:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.16.2bs:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.16.2s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.16.3as:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.16.3s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.16.4s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.17.0s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.17.1as:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.17.1s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.17.2s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.18.0s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.18.0sp:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.18.1s:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/o:cisco:ios_xe:*:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    cisco ios xe 3.16.0cs
    cisco ios xe 3.16.0s
    cisco ios xe 3.16.1as
    cisco ios xe 3.16.1s
    cisco ios xe 3.16.2as
    cisco ios xe 3.16.2bs
    cisco ios xe 3.16.2s
    cisco ios xe 3.16.3as
    cisco ios xe 3.16.3s
    cisco ios xe 3.16.4s
    cisco ios xe 3.17.0s
    cisco ios xe 3.17.1as
    cisco ios xe 3.17.1s
    cisco ios xe 3.17.2s
    cisco ios xe 3.18.0s
    cisco ios xe 3.18.0sp
    cisco ios xe 3.18.1s
    cisco ios xe *