Vulnerability Name:

CVE-2021-38598 (CCN-207714)

Assigned:2021-08-17
Published:2021-08-17
Updated:2021-08-28
Summary:OpenStack Neutron before 16.4.1, 17.x before 17.1.3, and 18.0.0 allows hardware address impersonation when the linuxbridge driver with ebtables-nft is used on a Netfilter-based platform. By sending carefully crafted packets, anyone in control of a server instance connected to the virtual switch can impersonate the hardware addresses of other systems on the network, resulting in denial of service or in some cases possibly interception of traffic intended for other destinations.
CVSS v3 Severity:9.1 Critical (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H)
7.9 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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): High
Availibility (A): High
5.9 Medium (CCN 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 (CCN 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
CVSS v2 Severity:5.8 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): Partial
5.4 Medium (CCN CVSS v2 Vector: AV:N/AC:H/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): High
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-863
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2021-38598

Source: CCN
Type: OSSA-2021-004
Linuxbridge ARP filter bypass on Netfilter platforms (CVE-2021-38598)

Source: XF
Type: UNKNOWN
openstack-cve202138598-dos(207714)

Source: MISC
Type: Exploit, Issue Tracking, Third Party Advisory
https://launchpad.net/bugs/1938670

Source: CCN
Type: OpenStack Web site
OpenStack Neutron

Source: CCN
Type: oss-sec Mailing List, Tue, 17 Aug 2021 15:17:17 +0000
[OSSA-2021-004] Neutron: Linuxbridge ARP filter bypass on Netfilter platforms (CVE-2021-38598)

Vulnerable Configuration:Configuration 1:
  • cpe:/a:openstack:neutron:*:*:*:*:*:*:*:* (Version < 16.4.1)
  • OR cpe:/a:openstack:neutron:*:*:*:*:*:*:*:* (Version >= 17.0.0 and < 17.1.3)
  • OR cpe:/a:openstack:neutron:18.0.0:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:openstack:neutron:17.0.0:*:*:*:*:*:*:*
  • OR cpe:/a:openstack:neutron:18.0.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    openstack neutron *
    openstack neutron *
    openstack neutron 18.0.0
    openstack neutron 17.0.0
    openstack neutron 18.0.0