CVE Vulnerabilities

CVE-2021-41088

Origin Validation Error

Published: Sep 23, 2021 | Modified: Aug 12, 2022
CVSS 3.x
8.8
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.x
9.3 HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C
RedHat/V2
RedHat/V3
Ubuntu
LOW

Elvish is a programming language and interactive shell, combined into one package. In versions prior to 0.14.0 Elvishs web UI backend (started by elvish -web) hosts an endpoint that allows executing the code sent from the web UI. The backend does not check the origin of requests correctly. As a result, if the user has the web UI backend open and visits a compromised or malicious website, the website can send arbitrary code to the endpoint in localhost. All Elvish releases from 0.14.0 onward no longer include the the web UI, although it is still possible for the user to build a version from source that includes the web UI. The issue can be patched for previous versions by removing the web UI (found in web, pkg/web or pkg/prog/web, depending on the exact version).

Weakness

The product does not properly verify that the source of data or communication is valid.

Affected Software

Name Vendor Start Version End Version
Elvish Elv * 0.14.0 (excluding)
Elvish Ubuntu bionic *
Elvish Ubuntu hirsute *
Elvish Ubuntu impish *
Elvish Ubuntu kinetic *
Elvish Ubuntu lunar *
Elvish Ubuntu mantic *
Elvish Ubuntu trusty *
Elvish Ubuntu xenial *

References