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Claims Authentication

High
mrivera-ms published GHSA-qxx8-292g-2w66 Feb 22, 2021

Package

nuget Microsoft.Bot.Connector (Nuget)

Affected versions

4.6.0-4.10.2

Patched versions

4.6.4, 4.7.3, 4.8.2, 4.9.5, 4.10.3

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 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 appropriate 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 the Claims are Skill Claims.

For detailed instructions, see the link in the References section.

References

https://aka.ms/SkillClaimsValidationDotnet

For more information

If you have any questions or comments about this advisory:

Severity

High

CVE ID

CVE-2021-1725

Weaknesses

No CWEs