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Sentry SDK leaks sensitive session information when `sendDefaultPII` is set to `True`

High severity GitHub Reviewed Published Mar 21, 2023 in getsentry/sentry-python • Updated Mar 22, 2023

Package

pip sentry-sdk (pip)

Affected versions

< 1.14.0

Patched versions

1.14.0

Description

Impact

When using the Django integration of the Sentry SDK in a specific configuration it is possible to leak sensitive cookies values, including the session cookie to Sentry. These sensitive cookies could then be used by someone with access to your Sentry issues to impersonate or escalate their privileges within your application.

The below must be true in order for these sensitive values to be leaked:

  1. Your Sentry SDK configuration has sendDefaultPII set to True
  2. You are using a custom name for either of the cookies below in your Django settings.
  1. You are not configured in your organization or project settings to use our data scrubbing features to account for the custom cookie names

Patches

As of version 1.14.0, the Django integration of the sentry-sdk will detect the custom cookie names based on your Django settings and will remove the values from the payload before sending the data to Sentry.

Workarounds

If you can not update your sentry-sdk to a patched version than you can use the SDKs filtering mechanism to remove the cookies from the payload that is sent to Sentry. For error events this can be done with the before_send callback method and for performance related events (transactions) you can use the before_send_transaction callback method.

If you'd like to handle filtering of these values on the server-side, you can also use our advanced data scrubbing feature to account for the custom cookie names. Look for the $http.cookies, $http.headers, $request.cookies, or $request.headers fields to target with your scrubbing rule.

References

Credits

References

@mdtro mdtro published to getsentry/sentry-python Mar 21, 2023
Published to the GitHub Advisory Database Mar 21, 2023
Reviewed Mar 21, 2023
Published by the National Vulnerability Database Mar 22, 2023
Last updated Mar 22, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
Low
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N

EPSS score

0.090%
(40th percentile)

CVE ID

CVE-2023-28117

GHSA ID

GHSA-29pr-6jr8-q5jm
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