Vulnerability Name:

CVE-2019-18836 (CCN-171294)

Assigned:2019-10-07
Published:2019-10-07
Updated:2019-11-12
Summary:Envoy 1.12.0 allows a remote denial of service because of resource loops, as demonstrated by a single idle TCP connection being able to keep a worker thread in an infinite busy loop when continue_on_listener_filters_timeout is used."
CVSS v3 Severity:7.5 High (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 (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
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:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
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-835
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2019-18836

Source: MISC
Type: Vendor Advisory
https://blog.envoyproxy.io

Source: CCN
Type: Envoy Proxy Blog
The official Envoy Proxy blog

Source: XF
Type: UNKNOWN
envoy-cve201918836-dos(171294)

Source: CCN
Type: Envoy GIT Repository
Listener Filter Timeout DoS

Source: CONFIRM
Type: Exploit, Third Party Advisory
https://github.com/envoyproxy/envoy/security/advisories/GHSA-3xvf-4396-cj46

Source: CCN
Type: istio GIT Repository
Istio Sidecar consuming high CPU Istio 1.30-1.3.3 #18229

Source: MISC
Type: Exploit, Third Party Advisory
https://github.com/istio/istio/issues/18229

Source: MISC
Type: Mailing List, Third Party Advisory
https://groups.google.com/forum/#!forum/envoy-users

Vulnerable Configuration:Configuration 1:
  • cpe:/a:envoyproxy:envoy:1.12.0:*:*:*:*:*:*:*

  • Configuration 2:
  • cpe:/a:istio:istio:*:*:*:*:*:*:*:* (Version >= 1.3.0 and <= 1.3.3)

  • Configuration CCN 1:
  • cpe:/a:istio:istio:1.2.3:*:*:*:*:*:*:*
  • OR cpe:/a:istio:istio:1.2.0:*:*:*:*:*:*:*
  • OR cpe:/a:istio:istio:1.2.1:*:*:*:*:*:*:*
  • OR cpe:/a:istio:istio:1.2.2:*:*:*:*:*:*:*
  • OR cpe:/a:istio:istio:1.2.4:*:*:*:*:*:*:*
  • OR cpe:/a:istio:istio:1.2.5:*:*:*:*:*:*:*
  • OR cpe:/a:istio:istio:1.3.4:*:*:*:*:*:*:*
  • OR cpe:/a:istio:istio:1.2.6:*:*:*:*:*:*:*
  • OR cpe:/a:istio:istio:1.2.7:*:*:*:*:*:*:*
  • OR cpe:/a:istio:istio:1.2.8:*:*:*:*:*:*:*
  • OR cpe:/a:istio:istio:1.2.9:*:*:*:*:*:*:*
  • OR cpe:/a:istio:istio:1.3.0:*:*:*:*:*:*:*
  • OR cpe:/a:istio:istio:1.3.1:*:*:*:*:*:*:*
  • OR cpe:/a:istio:istio:1.3.2:*:*:*:*:*:*:*
  • OR cpe:/a:istio:istio:1.3.3:*:*:*:*:*:*:*
  • OR cpe:/a:istio:istio:1.3.5:*:*:*:*:*:*:*
  • OR cpe:/a:istio:istio:1.4.0:*:*:*:*:*:*:*
  • OR cpe:/a:istio:istio:1.4.1:*:*:*:*:*:*:*

  • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:201918836
    V
    CVE-2019-18836
    2022-05-22
    oval:org.opensuse.security:def:72909
    P
    Security update for the Linux Kernel (Important)
    2020-12-01
    oval:org.opensuse.security:def:73027
    P
    Add features for Metrics Server, Cert Status Checker, VSphere VCP, and Cilium Envoy (Moderate)
    2020-12-01
    BACK
    envoyproxy envoy 1.12.0
    istio istio *
    istio istio 1.2.3
    istio istio 1.2.0
    istio istio 1.2.1
    istio istio 1.2.2
    istio istio 1.2.4
    istio istio 1.2.5
    istio istio 1.3.4
    istio istio 1.2.6
    istio istio 1.2.7
    istio istio 1.2.8
    istio istio 1.2.9
    istio istio 1.3.0
    istio istio 1.3.1
    istio istio 1.3.2
    istio istio 1.3.3
    istio istio 1.3.5
    istio istio 1.4.0
    istio istio 1.4.1