CVE-2021-1725

Description

### Impact A maliciously crafted claim may be incorrectly authenticated by the bot. Impacts bots that are not configured to be used as a Skill. This vulnerability requires an attacker to have internal knowledge of the bot. ### Patches The problem has been patched in all affected versions. Please see the list of patched versions for the most appropiate one for your individual case. ### Workarounds Users who do not wish or are not able to upgrade can add an authentication configuration containing ClaimsValidator, which throws an exception if Claims are Skill Claims. For detailed instructions, see the link in the References section. ### For more information If you have any questions or comments about this advisory: * Open an issue in [Microsoft Bot Builder SDK](https://github.com/microsoft/botframework-sdk) * Email us at [[email protected]](mailto:[email protected])

How to fix CVE-2021-1725

To remediate CVE-2021-1725, upgrade the affected package to a fixed version below.

• —upgrade to 4.7.3 or later
• —upgrade to 4.7.2 or later
• —upgrade to 4.7.2 or later

Is CVE-2021-1725 being exploited?

Low — EPSS is 0.5%, meaning exploitation activity has not been observed at scale.

Affected packages (3)

• >= 4.7.0, < 4.7.3
• >= 4.7.0, < 4.7.2
• >= 4.7.0, < 4.7.2, >= 4.8.0, < 4.8.1, >= 4.9.0, < 4.9.3, >= 4.10.0, < 4.10.1

CVSS scores

References (10)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2021-1725
• PATCHgithub.com/microsoft/botbuilder-js
• WEBaka.ms/SkillClaimsValidationJavascript
• WEBgithub.com/microsoft/botbuilder-js/security/advisories/GHSA-fvcj-hvfw-7f2v