Vulnerability Name:

CVE-2020-15114 (CCN-186410)

Assigned:2020-08-05
Published:2020-08-05
Updated:2021-11-18
Summary:In etcd before versions 3.3.23 and 3.4.10, the etcd gateway is a simple TCP proxy to allow for basic service discovery and access. However, it is possible to include the gateway address as an endpoint. This results in a denial of service, since the endpoint can become stuck in a loop of requesting itself until there are no more available file descriptors to accept connections on the gateway.
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
7.5 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:4.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
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-772
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2020-15114

Source: XF
Type: UNKNOWN
etcd-cve202015114-dos(186410)

Source: CCN
Type: etcd GIT Repository
Gateway can include itself as an endpoint resulting in resource exhaustion

Source: CONFIRM
Type: Third Party Advisory
https://github.com/etcd-io/etcd/security/advisories/GHSA-2xhq-gv6c-p224

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2020-cd43b84c16

Vulnerable Configuration:Configuration 1:
  • cpe:/a:redhat:etcd:*:*:*:*:*:*:*:* (Version >= 3.3.0 and < 3.3.23)
  • OR cpe:/a:redhat:etcd:*:*:*:*:*:*:*:* (Version >= 3.4.0 and < 3.4.10)

    • Configuration 2:
  • cpe:/o:fedoraproject:fedora:32:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    redhat etcd *
    redhat etcd *
    fedoraproject fedora 32