CVE-2024-9487: enterprise server Signature Bypass

Description

An improper verification of cryptographic signature vulnerability was identified in GitHub Enterprise Server that allowed SAML SSO authentication to be bypassed resulting in unauthorized provisioning of users and access to the instance. Exploitation required the encrypted assertions feature to be enabled, and the attacker would require direct network access as well as a signed SAML response or metadata document. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.15 and was fixed in versions 3.11.16, 3.12.10, 3.13.5, and 3.14.2. This vulnerability was reported via the GitHub Bug Bounty program.

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CVSS v3.1 Score

9.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Weakness Type (CWE)

CWE-347 CWE-347

Affected Products

Vendor	Product	Versions
github	enterprise_server	< 3.11.16
github	enterprise_server	3.12.0 — 3.12.10
github	enterprise_server	3.13.0 — 3.13.5
github	enterprise_server	3.14.0 — 3.14.2

References

Other References

https://docs.github.com/en/[email protected]/admin/release-notes#3.11.16 https://docs.github.com/en/[email protected]/admin/release-notes#3.12.10 https://docs.github.com/en/[email protected]/admin/release-notes#3.13.5 https://docs.github.com/en/[email protected]/admin/release-notes#3.14.2

Frequently Asked Questions

What is CVE-2024-9487? +

An improper verification of cryptographic signature vulnerability was identified in GitHub Enterprise Server that allowed SAML SSO authentication to be bypassed resulting in unauthorized provisioning of users and access to the instance. Exploitation required the encrypted assertions feature to be enabled, and the attacker would require direct network access as well as a signed SAML response or metadata document. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.15 and was fixed in versions 3.11.16, 3.12.10, 3.13.5, and 3.14.2. This vulnerability was reported via the GitHub Bug Bounty program. It has a CVSS v3.1 base score of 9.1 (CRITICAL).

How severe is CVE-2024-9487? +

CVE-2024-9487 has a CVSS v3.1 score of 9.1 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2024-9487? +

CVE-2024-9487 affects products from github, specifically: enterprise_server. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-9487? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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