CVE-2020-11767
Istio/Envoy SNI-Triggered Domain Hijacking Vulnerability
Description
Istio through 1.5.1 and Envoy through 1.14.1 have a data-leak issue. If there is a TCP connection (negotiated with SNI over HTTPS) to *.example.com, a request for a domain concurrently configured explicitly (e.g., abc.example.com) is sent to the server(s) listening behind *.example.com. The outcome should instead be 421 Misdirected Request. Imagine a shared caching forward proxy re-using an HTTP/2 connection for a large subnet with many users. If a victim is interacting with abc.example.com, and a server (for abc.example.com) recycles the TCP connection to the forward proxy, the victim's browser may suddenly start sending sensitive data to a *.example.com server. This occurs because the forward proxy between the victim and the origin server reuses connections (which obeys the specification), but neither Istio nor Envoy corrects this by sending a 421 error. Similarly, this behavior voids the security model browsers have put in place between domains.
INFO
Published Date :
April 15, 2020, 2:15 a.m.
Last Modified :
July 21, 2021, 11:39 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
1.4
Exploitability Score :
1.6
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-11767.
| URL | Resource |
|---|---|
| https://bugs.chromium.org/p/chromium/issues/detail?id=954160#c5 | Issue Tracking Third Party Advisory |
| https://github.com/envoyproxy/envoy/issues/6767 | Third Party Advisory |
| https://github.com/istio/istio/issues/13589 | Exploit Third Party Advisory |
| https://github.com/istio/istio/issues/9429 | Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-11767 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-11767 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CWE Remap by [email protected]
Jul. 21, 2021
Action Type Old Value New Value Changed CWE CWE-200 NVD-CWE-noinfo -
Reanalysis by [email protected]
Sep. 14, 2020
Action Type Old Value New Value Removed CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:N/A:N) Added CVSS V2 NIST (AV:N/AC:H/Au:N/C:P/I:N/A:N) Removed CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N Added CVSS V3.1 NIST AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N -
Initial Analysis by [email protected]
Apr. 22, 2020
Action Type Old Value New Value Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:N/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N Changed Reference Type https://bugs.chromium.org/p/chromium/issues/detail?id=954160#c5 No Types Assigned https://bugs.chromium.org/p/chromium/issues/detail?id=954160#c5 Issue Tracking, Third Party Advisory Changed Reference Type https://github.com/envoyproxy/envoy/issues/6767 No Types Assigned https://github.com/envoyproxy/envoy/issues/6767 Third Party Advisory Changed Reference Type https://github.com/istio/istio/issues/13589 No Types Assigned https://github.com/istio/istio/issues/13589 Exploit, Third Party Advisory Changed Reference Type https://github.com/istio/istio/issues/9429 No Types Assigned https://github.com/istio/istio/issues/9429 Third Party Advisory Added CWE NIST CWE-200 Added CPE Configuration OR *cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* versions up to (including) 1.14.1 *cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:* versions up to (including) 1.5.1
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-11767 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-11767
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.14 }} 0.00%
score
0.48277
percentile