Vulnerability Name:

CVE-2017-3859 (CCN-123574)

Assigned:2016-12-21
Published:2017-03-22
Updated:2017-07-12
Summary:A vulnerability in the DHCP code for the Zero Touch Provisioning feature of Cisco ASR 920 Series Aggregation Services Routers could allow an unauthenticated, remote attacker to cause an affected device to reload. The vulnerability is due to a format string vulnerability when processing a crafted DHCP packet for Zero Touch Provisioning. An attacker could exploit this vulnerability by sending a specially crafted DHCP packet to an affected device. An exploit could allow the attacker to cause the device to reload, resulting in a denial of service (DoS) condition. This vulnerability affects Cisco ASR 920 Series Aggregation Services Routers that are running an affected release of Cisco IOS XE Software (3.13 through 3.18) and are listening on the DHCP server port. By default, the devices do not listen on the DHCP server port. Cisco Bug IDs: CSCuy56385.
CVSS v3 Severity:7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/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): None
Availibility (A): High
8.6 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H)
7.5 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/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): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:7.8 High (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-134
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2017-3859

Source: BID
Type: Third Party Advisory, VDB Entry
97008

Source: CCN
Type: BID-97008
Cisco IOS XE Software CVE-2017-3859 Denial of Service Vulnerability

Source: SECTRACK
Type: UNKNOWN
1038104

Source: XF
Type: UNKNOWN
cisco-ztp-cve20173859-dos(123574)

Source: CCN
Type: Cisco Security Advisory cisco-sa-20170322-ztp
Cisco IOS XE Software for Cisco ASR 920 Series Routers Zero Touch Provisioning Denial of Service Vulnerability

Source: CONFIRM
Type: Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170322-ztp

Vulnerable Configuration:Configuration 1:
  • cpe:/o:cisco:ios_xe:3.13.4s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.13.5as:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.13.5s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.13.6as:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.13.6s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.14.3s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.14.4s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.15.2s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.15.3s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.15.4s:*:*:*:*:*:*:*
  • OR 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:3.17.0s:*:*:*:*:*:*:*
  • 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:3.18.0as:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.18.0s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.18.0sp:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.18.1asp:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.18.1bsp:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.18.1csp:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.18.1s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.18.1sp:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.18.2s:*:*:*:*:*:*:*
  • OR cpe:/o:cisco:ios_xe:3.18.3vs:*:*:*:*:*:*:*
  • AND
  • cpe:/h:cisco:asr-920-12cz-a:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr-920-12cz-d:-:*:*:*:*:*:*:*
  • 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-a:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr-920-4sz-d:-:*:*:*:*:*:*:*

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

    • * Denotes that component is vulnerable
    BACK
    cisco ios xe 3.13.4s
    cisco ios xe 3.13.5as
    cisco ios xe 3.13.5s
    cisco ios xe 3.13.6as
    cisco ios xe 3.13.6s
    cisco ios xe 3.14.3s
    cisco ios xe 3.14.4s
    cisco ios xe 3.15.2s
    cisco ios xe 3.15.3s
    cisco ios xe 3.15.4s
    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 3.17.0s
    cisco ios xe 3.17.1as
    cisco ios xe 3.17.1s
    cisco ios xe 3.17.2s
    cisco ios xe 3.18.0as
    cisco ios xe 3.18.0s
    cisco ios xe 3.18.0sp
    cisco ios xe 3.18.1asp
    cisco ios xe 3.18.1bsp
    cisco ios xe 3.18.1csp
    cisco ios xe 3.18.1s
    cisco ios xe 3.18.1sp
    cisco ios xe 3.18.2s
    cisco ios xe 3.18.3vs
    cisco asr-920-12cz-a -
    cisco asr-920-12cz-d -
    cisco asr-920-12sz-im -
    cisco asr-920-24sz-im -
    cisco asr-920-24sz-m -
    cisco asr-920-24tz-m -
    cisco asr-920-4sz-a -
    cisco asr-920-4sz-d -
    cisco ios xe software *