Vulnerability Name:

CVE-2019-15226 (CCN-169673)

Assigned:2019-10-07
Published:2019-10-07
Updated:2019-10-17
Summary:Upon receiving each incoming request header data, Envoy will iterate over existing request headers to verify that the total size of the headers stays below a maximum limit. The implementation in versions 1.10.0 through 1.11.1 for HTTP/1.x traffic and all versions of Envoy for HTTP/2 traffic had O(n^2) performance characteristics. A remote attacker may craft a request that stays below the maximum request header size but consists of many thousands of small headers to consume CPU and result in a denial-of-service attack.
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)
6.6 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:U/RC:R)
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)
6.6 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:U/RC:R)
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:7.8 High (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
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-2019-15226

Source: XF
Type: UNKNOWN
envoy-cve201915226-dos(169673)

Source: MISC
Type: Patch, Third Party Advisory
https://github.com/envoyproxy/envoy/commit/afc39bea36fd436e54262f150c009e8d72db5014

Source: MISC
Type: Third Party Advisory
https://github.com/envoyproxy/envoy/commits/master

Source: CCN
Type: Envoy GIT Repository
CVE-2019-15226 #8520

Source: MISC
Type: Third Party Advisory
https://github.com/envoyproxy/envoy/issues/8520

Vulnerable Configuration:Configuration 1:
  • cpe:/a:envoyproxy:envoy:1.0.0:*:*:*:*:*:*:*
  • OR cpe:/a:envoyproxy:envoy:1.1.0:*:*:*:*:*:*:*
  • OR cpe:/a:envoyproxy:envoy:1.2.0:*:*:*:*:*:*:*
  • OR cpe:/a:envoyproxy:envoy:1.3.0:*:*:*:*:*:*:*
  • OR cpe:/a:envoyproxy:envoy:1.4.0:*:*:*:*:*:*:*
  • OR cpe:/a:envoyproxy:envoy:1.5.0:*:*:*:*:*:*:*
  • OR cpe:/a:envoyproxy:envoy:1.6.0:*:*:*:*:*:*:*
  • OR cpe:/a:envoyproxy:envoy:1.7.0:*:*:*:*:*:*:*
  • OR cpe:/a:envoyproxy:envoy:1.7.1:*:*:*:*:*:*:*
  • OR cpe:/a:envoyproxy:envoy:1.8.0:*:*:*:*:*:*:*
  • OR cpe:/a:envoyproxy:envoy:1.9.0:*:*:*:*:*:*:*
  • OR cpe:/a:envoyproxy:envoy:1.9.1:*:*:*:*:*:*:*
  • OR cpe:/a:envoyproxy:envoy:1.10.0:*:*:*:*:*:*:*
  • OR cpe:/a:envoyproxy:envoy:1.11.0:*:*:*:*:*:*:*
  • OR cpe:/a:envoyproxy:envoy:1.11.1:*:*:*:*:*:*:*
  • OR cpe:/a:envoyproxy:envoy:1.11.2:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:envoyproxy:envoy:1.11.1:*:*:*:*:*:*:*
  • OR cpe:/a:envoyproxy:envoy:1.10.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    envoyproxy envoy 1.0.0
    envoyproxy envoy 1.1.0
    envoyproxy envoy 1.2.0
    envoyproxy envoy 1.3.0
    envoyproxy envoy 1.4.0
    envoyproxy envoy 1.5.0
    envoyproxy envoy 1.6.0
    envoyproxy envoy 1.7.0
    envoyproxy envoy 1.7.1
    envoyproxy envoy 1.8.0
    envoyproxy envoy 1.9.0
    envoyproxy envoy 1.9.1
    envoyproxy envoy 1.10.0
    envoyproxy envoy 1.11.0
    envoyproxy envoy 1.11.1
    envoyproxy envoy 1.11.2
    envoyproxy envoy 1.11.1
    envoyproxy envoy 1.10.0