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Security Advisories: GSA_kwCzR0hTQS1ycnFyLTd3NTktNjM3ds4AA9mz
Pomerium exposed OAuth2 access and ID tokens in user info endpoint response
Impact
The Pomerium user info page (at /.pomerium
) unintentionally included serialized OAuth2 access and ID tokens from the logged-in user's session. These tokens are not intended to be exposed to end users.
This issue may be more severe in the presence of an XSS vulnerability in an upstream application proxied through Pomerium. If an attacker could insert a malicious script onto a web page proxied through Pomerium, that script could access these tokens by making a request to the /.pomerium
endpoint.
Upstream applications that authenticate only the ID token may be vulnerable to user impersonation using a token obtained in this manner.
Note that an OAuth2 access token or ID token by itself is not sufficient to hijack a user's Pomerium session. Upstream applications should not be vulnerable to user impersonation via these tokens provided:
- the application verifies the Pomerium JWT for each request,
- the connection between Pomerium and the application is secured by mTLS,
- or the connection between Pomerium and the application is otherwise secured at the network layer.
Patches
Patched in Pomerium v0.26.1.
Workarounds
None
For more information
If you have any questions or comments about this advisory:
- Open an issue in pomerium/pomerium
- Email us at [email protected]
Credit to Vadim Sheydaev, aka Enr1g for reporting this issue.
Permalink: https://github.com/advisories/GHSA-rrqr-7w59-637vJSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1ycnFyLTd3NTktNjM3ds4AA9mz
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: 2 months ago
Updated: about 1 month ago
CVSS Score: 5.7
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Identifiers: GHSA-rrqr-7w59-637v, CVE-2024-39315
References:
- https://github.com/pomerium/pomerium/security/advisories/GHSA-rrqr-7w59-637v
- https://nvd.nist.gov/vuln/detail/CVE-2024-39315
- https://github.com/pomerium/pomerium/commit/4c7c4320afb2ced70ba19b46de1ac4383f3daa48
- https://github.com/advisories/GHSA-rrqr-7w59-637v
Blast Radius: 4.0
Affected Packages
go:github.com/pomerium/pomerium
Dependent packages: 5Dependent repositories: 5
Downloads:
Affected Version Ranges: < 0.26.1
Fixed in: 0.26.1
All affected versions: 0.0.1, 0.0.2, 0.0.3, 0.0.4, 0.0.5, 0.1.0, 0.2.0, 0.2.1, 0.3.0, 0.3.1, 0.4.0, 0.4.1, 0.4.2, 0.5.0, 0.5.1, 0.5.2, 0.6.0, 0.6.1, 0.6.2, 0.6.3, 0.6.4, 0.7.0, 0.7.1, 0.7.2, 0.7.3, 0.7.4, 0.7.5, 0.7.6, 0.8.0, 0.8.1, 0.8.2, 0.8.3, 0.8.4, 0.9.0, 0.9.1, 0.9.2, 0.9.4, 0.9.5, 0.9.6, 0.10.0, 0.10.1, 0.10.2, 0.10.3, 0.10.4, 0.10.5, 0.10.6, 0.11.0, 0.11.1, 0.12.0, 0.12.1, 0.12.2, 0.13.0, 0.13.1, 0.13.2, 0.13.3, 0.13.4, 0.13.5, 0.13.6, 0.14.0, 0.14.1, 0.14.2, 0.14.3, 0.14.4, 0.14.5, 0.14.6, 0.14.7, 0.14.8, 0.15.0, 0.15.1, 0.15.2, 0.15.3, 0.15.4, 0.15.5, 0.15.6, 0.15.7, 0.15.8, 0.16.0, 0.16.1, 0.16.2, 0.16.3, 0.16.4, 0.17.0, 0.17.1, 0.17.2, 0.17.3, 0.17.4, 0.18.0, 0.18.1, 0.19.0, 0.19.1, 0.19.2, 0.20.0, 0.20.1, 0.21.0, 0.21.1, 0.21.2, 0.21.3, 0.21.4, 0.22.0, 0.22.1, 0.22.2, 0.22.3, 0.23.0, 0.24.0, 0.25.0
All unaffected versions: