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CVE-2023-26483

5.3 · MEDIUM

gosaml2 is a Pure Go implementation of SAML 2.0.

Published Mar 3, 2023CWE-409EPSS 0.96%

Overview

CVE-2023-26483 is a medium-severity vulnerability. It was published on March 3, 2023 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

gosaml2 is a Pure Go implementation of SAML 2.0. SAML Service Providers using this library for SAML authentication support are likely susceptible to Denial of Service attacks. A bug in this library enables attackers to craft a `deflate`-compressed request which will consume significantly more memory during processing than the size of the original request. This may eventually lead to memory exhaustion and the process being killed. The maximum compression ratio achievable with `deflate` is 1032:1, so by limiting the size of bodies passed to gosaml2, limiting the rate and concurrency of calls, and ensuring that lots of memory is available to the process it _may_ be possible to help Go's garbage collector "keep up". Implementors are encouraged not to rely on this. This issue is fixed in version 0.9.0.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/russellhaering/gosaml2/commit/f9d66040241093e8702649baff50cc70d2c683c0GitHubgithub.com/russellhaering/gosaml2/releases/tag/v0.9.0GitHubgithub.com/russellhaering/gosaml2/security/advisories/GHSA-6gc3-crp7-25w5Refpkg.go.dev/vuln/GO-2023-1602GitHubgithub.com/russellhaering/gosaml2/commit/f9d66040241093e8702649baff50cc70d2c683c0GitHubgithub.com/russellhaering/gosaml2/releases/tag/v0.9.0GitHubgithub.com/russellhaering/gosaml2/security/advisories/GHSA-6gc3-crp7-25w5Refpkg.go.dev/vuln/GO-2023-1602

How CyberStrike helps

Frequently asked questions

What is CVE-2023-26483?

CVE-2023-26483 is a medium-severity vulnerability. It was published on March 3, 2023 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2023-26483?

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2023-26483?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-26483?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-26483 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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