Vulnerability Name:

CVE-2020-25017 (CCN-189335)

Assigned:2020-09-29
Published:2020-09-29
Updated:2020-10-15
Summary:Envoy through 1.15.0 only considers the first value when multiple header values are present for some HTTP headers. Envoy’s setCopy() header map API does not replace all existing occurences of a non-inline header.
CVSS v3 Severity:8.3 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L)
7.2 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L/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): Changed
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): Low
7.3 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)
6.4 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/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): Low
Integrity (I): Low
Availibility (A): Low
CVSS v2 Severity:7.5 High (CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
7.5 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
Vulnerability Type:CWE-Other
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2020-25017

Source: XF
Type: UNKNOWN
envoy-cve202025017-sec-bypass(189335)

Source: CCN
Type: Envoy GIT Repository
Incorrect handling of duplicate HTTP headers

Source: MISC
Type: Exploit, Third Party Advisory
https://github.com/envoyproxy/envoy/security/advisories/GHSA-2v25-cjjq-5f4w

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

Vulnerable Configuration:Configuration 1:
  • cpe:/a:envoyproxy:envoy:*:*:*:*:*:*:*:* (Version < 1.12.7)
  • OR cpe:/a:envoyproxy:envoy:*:*:*:*:*:*:*:* (Version >= 1.13.0 and < 1.13.4)
  • OR cpe:/a:envoyproxy:envoy:*:*:*:*:*:*:*:* (Version >= 1.14.0 and < 1.14.4)
  • OR cpe:/a:envoyproxy:envoy:*:*:*:*:*:*:*:* (Version >= 1.15.0 and < 1.15.1)

    • Configuration CCN 1:
  • cpe:/a:envoyproxy:envoy:1.15.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    envoyproxy envoy *
    envoyproxy envoy *
    envoyproxy envoy *
    envoyproxy envoy *
    envoyproxy envoy 1.15.0