Improper Authentication Affecting github.com/robotsandpencils/go-saml package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-GOLANG-GITHUBCOMROBOTSANDPENCILSGOSAML-7640983
- published6 Aug 2024
- disclosed5 Aug 2024
- creditPeter Stöckli
Introduced: 5 Aug 2024
CVE-2023-48703 (opens in a new tab)How to fix?
There is no fixed version for github.com/RobotsAndPencils/go-saml.
Overview
github.com/RobotsAndPencils/go-saml is a SAML client library written in Go.
Affected versions of this package are vulnerable to Improper Authentication due to the improper handling of the xmlsec1 command line tool during the signature verification process. An attacker can manipulate the SAML assertions by providing a self-signed public key embedded directly in the SAML token, effectively bypassing authentication controls.
Note:
This is only exploitable if the system relies on the default configuration of the xmlsec1 tool without specifying enabled key data.
Workaround
This vulnerability can be mitigated by forking the go-saml project and adding the command line argument --enabled-key-data with a value such as x509 or raw-x509-cert when using the xmlsec1 binary in the verify function.