Vulnerability Name:

CVE-2018-0309 (CCN-145148)

Assigned:2017-11-27
Published:2018-06-20
Updated:2019-10-09
Summary:A vulnerability in the implementation of a specific CLI command and the associated Simple Network Management Protocol (SNMP) MIB for Cisco NX-OS (in standalone NX-OS mode) on Cisco Nexus 3000 and 9000 Series Switches could allow an authenticated, remote attacker to exhaust system memory on an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to the incorrect implementation of the CLI command, resulting in a failure to free all allocated memory upon completion. An attacker could exploit this vulnerability by authenticating to the affected device and repeatedly issuing a specific CLI command or sending a specific SNMP poll request for a specific Object Identifier (OID). A successful exploit could allow the attacker to cause the IP routing process to restart or to cause a device reset, resulting in a DoS condition. Cisco Bug IDs: CSCvf23136.
CVSS v3 Severity:7.7 High (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 (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
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:6.8 Medium (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
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-400
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2018-0309

Source: SECTRACK
Type: Third Party Advisory, VDB Entry
1041169

Source: XF
Type: UNKNOWN
cisco-cve20180309-dos(145148)

Source: CCN
Type: Cisco Security Advisory cisco-sa-20180620-n3k-n9k-clisnmp
Cisco Nexus 3000 and 9000 Series CLI and Simple Network Management Protocol Polling Denial of Service Vulnerability

Source: CONFIRM
Type: Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-n3k-n9k-clisnmp

Vulnerable Configuration:Configuration 1:
  • cpe:/o:cisco:nx-os:7.0(3)i5(2):*:*:*:*:*:*:*
  • OR cpe:/o:cisco:nx-os:7.0(3)i6(1):*:*:*:*:*:*:*
  • AND
  • cpe:/h:cisco:nexus_3016:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_3048:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_3064:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_3064-t:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_31108pc-v:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_31108tc-v:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_31128pq:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_3132q:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_3132q-v:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_3132q-xl:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_3164q:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_3172:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_3172pq-xl:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_3172tq:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_3172tq-32t:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_3172tq-xl:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_3232c:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_3264q:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_9000v:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_92160yc-x:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_92300yc:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_92304qc:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_9236c:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_9272q:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_93108tc-ex:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_93120tx:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_93128tx:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_93180lc-ex:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_93180yc-ex:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_9332pq:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_9372px:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_9372px-e:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_9372tx:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_9372tx-e:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_9396px:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_9396tx:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_9504:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_9508:-:*:*:*:*:*:*:*
  • OR cpe:/h:cisco:nexus_9516:-:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    cisco nx-os 7.0(3)i5(2)
    cisco nx-os 7.0(3)i6(1)
    cisco nexus 3016 -
    cisco nexus 3048 -
    cisco nexus 3064 -
    cisco nexus 3064-t -
    cisco nexus 31108pc-v -
    cisco nexus 31108tc-v -
    cisco nexus 31128pq -
    cisco nexus 3132q -
    cisco nexus 3132q-v -
    cisco nexus 3132q-xl -
    cisco nexus 3164q -
    cisco nexus 3172 -
    cisco nexus 3172pq-xl -
    cisco nexus 3172tq -
    cisco nexus 3172tq-32t -
    cisco nexus 3172tq-xl -
    cisco nexus 3232c -
    cisco nexus 3264q -
    cisco nexus 9000v -
    cisco nexus 92160yc-x -
    cisco nexus 92300yc -
    cisco nexus 92304qc -
    cisco nexus 9236c -
    cisco nexus 9272q -
    cisco nexus 93108tc-ex -
    cisco nexus 93120tx -
    cisco nexus 93128tx -
    cisco nexus 93180lc-ex -
    cisco nexus 93180yc-ex -
    cisco nexus 9332pq -
    cisco nexus 9372px -
    cisco nexus 9372px-e -
    cisco nexus 9372tx -
    cisco nexus 9372tx-e -
    cisco nexus 9396px -
    cisco nexus 9396tx -
    cisco nexus 9504 -
    cisco nexus 9508 -
    cisco nexus 9516 -