Vulnerability Name:

CVE-2017-4920 (CCN-135938)

Assigned:2016-12-26
Published:2017-08-10
Updated:2017-12-22
Summary:The implementation of the OSPF protocol in VMware NSX-V Edge 6.2.x prior to 6.2.8 and NSX-V Edge 6.3.x prior to 6.3.3 doesn't correctly handle the link-state advertisement (LSA). A rogue LSA may exploit this issue resulting in continuous sending of LSAs between two routers eventually going in loop or loss of connectivity.
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:N/A:H)
5.2 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/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): High
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
7.5 High (CCN 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 (CCN 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
CVSS v2 Severity:7.1 High (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
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-400
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2017-4920

Source: BID
Type: Third Party Advisory, VDB Entry
100277

Source: CCN
Type: BID-100277
VMware NSX-V Edge CVE-2017-4920 Denial of Service Vulnerability

Source: XF
Type: UNKNOWN
vmware-nsxvedge-cve20174920-dos(135938)

Source: CCN
Type: VMware Security Advisory VMSA-2017-0014
VMware NSX-V Edge updates address OSPF Protocol LSA DoS

Source: CONFIRM
Type: Vendor Advisory
https://www.vmware.com/security/advisories/VMSA-2017-0014.html

Vulnerable Configuration:Configuration 1:
  • cpe:/a:vmware:nsx-v_edge:*:*:*:*:*:*:*:* (Version >= 6.2.0 and < 6.2.8)
  • OR cpe:/a:vmware:nsx-v_edge:*:*:*:*:*:*:*:* (Version >= 6.3.0 and < 6.3.3)

    • * Denotes that component is vulnerable
    BACK
    vmware nsx-v edge *
    vmware nsx-v edge *