Is CVE-2024-45409 in the CISA KEV catalog?

No. CVE-2024-45409 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2024-45409?

CVE-2024-45409 has a CVSS v3 base score of 10.0 (CRITICAL).

What is the EPSS score for CVE-2024-45409?

CVE-2024-45409 has an EPSS score of 10.68% (95th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2024-45409?

Upgrade ruby-saml on debian 11 to 1.11.0-1+deb11u1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2024-45409

CRITICALEPSS 95th pctl

10.0

CVSS v3

NVD

Description

The Ruby SAML library is for implementing the client side of a SAML authorization. Ruby-SAML in <= 12.2 and 1.13.0 <= 1.16.0 does not properly verify the signature of the SAML Response. An unauthenticated attacker with access to any signed saml document (by the IdP) can thus forge a SAML Response/Assertion with arbitrary contents. This would allow the attacker to log in as arbitrary user within the vulnerable system. This vulnerability is fixed in 1.17.0 and 1.12.3.

CWE-347

How to fix

Remediation Available

ruby-samlDebian

Fixed in:1.11.0-1+deb11u1CVE-2024-45409

Fixed in:1.13.0-1+deb12u1CVE-2024-45409

ruby-samlUbuntu

Fixed in:1.1.2-1ubuntu1+esm1USN-7309-1

Fixed in:1.7.2-1ubuntu0.1~esm1USN-7309-1

Fixed in:1.11.0-1ubuntu0.1USN-7309-1

Fixed in:1.13.0-1ubuntu0.1USN-7309-1

Fixed in:1.15.0-1ubuntu0.24.04.1USN-7309-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

10.68%probability of exploitation in 30 days

95thpercentile

Very high risk: more likely to be exploited than 95% of all known CVEs.

References

Patch2

Vendor Advisory2

Other references4

Related Vulnerabilities

Other CWE-347 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2018-16042	Medium	6.5	82%	-	-
CVE-2025-59718	Critical	9.8	66%	KEV	Fix
CVE-2025-25292	Critical	9.8	64%	-	Fix
CVE-2021-22160	Critical	9.8	53%	-	Fix
CVE-2013-3900	Medium	5.5	45%	KEV	-
CVE-2018-0114	High	7.5	43%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.