Vulnerability Name:

CVE-2018-0160 (CCN-140959)

Assigned:2017-11-27
Published:2018-03-28
Updated:2019-10-09
Summary:A vulnerability in Simple Network Management Protocol (SNMP) subsystem of Cisco IOS XE Software could allow an authenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to improper management of memory resources, referred to as a double free. An attacker could exploit this vulnerability by sending crafted SNMP packets to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. To exploit this vulnerability via SNMP Version 2c or earlier, the attacker must know the SNMP read-only community string for an affected system. To exploit this vulnerability via SNMP Version 3, the attacker must know the user credentials for the affected system. This vulnerability affects Cisco devices that are running a vulnerable release of Cisco IOS XE Software, have been configured to be queried over SNMP, and have Network Address Translation (NAT) enabled. Cisco Bug IDs: CSCve75818.
CVSS v3 Severity:6.3 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H)
5.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:L/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): High
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
7.7 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H)
6.7 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/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): Low
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:6.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:S/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
6.8 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-415
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2018-0160

Source: BID
Type: Third Party Advisory, VDB Entry
103575

Source: CCN
Type: BID-103575
Cisco IOS XE Software CVE-2018-0160 Denial of Service Vulnerability

Source: SECTRACK
Type: Third Party Advisory, VDB Entry
1040584

Source: XF
Type: UNKNOWN
cisco-cve20180160-dos(140959)

Source: CCN
Type: Cisco Security Advisory cisco-sa-20180328-snmp-dos
Cisco IOS XE Software Simple Network Management Protocol Double-Free Denial of Service Vulnerability

Source: CONFIRM
Type: Mitigation, Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-snmp-dos

Vulnerable Configuration:Configuration 1:
  • cpe:/o:cisco:ios_xe:15.5(3)s:*:*:*:*:*:*:*
  • AND
  • cpe:/h:cisco:asr_901-12c-f-d:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr_901-12c-ft-d:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr_901-4c-f-d:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr_901-4c-ft-d:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr_901-6cz-f-a:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr_901-6cz-f-d:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr_901-6cz-fs-a:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr_901-6cz-fs-d:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr_901-6cz-ft-a:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr_901-6cz-ft-d:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr_901s-2sg-f-ah:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr_901s-2sg-f-d:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr_901s-3sg-f-ah:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr_901s-3sg-f-d:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:asr_901s-4sg-f-d:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:me_3600x-24cx-m:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:me_3600x-24fs-m:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:me_3600x-24ts-m:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:me_3800x-24fs-m:-:*:*:*:*:*:*:*

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

    • * Denotes that component is vulnerable
    BACK
    cisco ios xe 15.5(3)s
    cisco asr 901-12c-f-d -
    cisco asr 901-12c-ft-d -
    cisco asr 901-4c-f-d -
    cisco asr 901-4c-ft-d -
    cisco asr 901-6cz-f-a -
    cisco asr 901-6cz-f-d -
    cisco asr 901-6cz-fs-a -
    cisco asr 901-6cz-fs-d -
    cisco asr 901-6cz-ft-a -
    cisco asr 901-6cz-ft-d -
    cisco asr 901s-2sg-f-ah -
    cisco asr 901s-2sg-f-d -
    cisco asr 901s-3sg-f-ah -
    cisco asr 901s-3sg-f-d -
    cisco asr 901s-4sg-f-d -
    cisco me 3600x-24cx-m -
    cisco me 3600x-24fs-m -
    cisco me 3600x-24ts-m -
    cisco me 3800x-24fs-m -
    cisco ios xe software *