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Vulnerability · Published Mar 12, 2025 · Assigned by GitHub_M

CVE-2025-25293ruby-saml vulnerable to Remote Denial of Service (DoS) with compressed SAML responses

High 7.7

In plain English

A high-severity uncontrolled resource consumption in ruby-saml from SAML-Toolkits. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.5% (higher than 75% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)7.7High
Exploit odds (30 days)1.5%top 25.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

ruby-saml provides security assertion markup language (SAML) single sign-on (SSO) for Ruby. Prior to versions 1.12.4 and 1.18.0, ruby-saml is susceptible to remote Denial of Service (DoS) with compressed SAML responses. ruby-saml uses zlib to decompress SAML responses in case they're compressed. It is possible to bypass the message size check with a compressed assertion since the message size is checked before inflation and not after. This issue may lead to remote Denial of Service (DoS). Versions 1.12.4 and 1.18.0 fix the issue.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12ruby-samlno fix listedDEBIAN-CVE-2025-25293
RubyGemsruby-saml1.12.4GHSA-92rq-c8cf-prrq
RubyGemsruby-saml1.18.0GHSA-92rq-c8cf-prrq

Affected products (as reported)

VendorProductVersions
SAML-Toolkits ruby-saml < 1.12.4>= 1.13.0, < 1.18.0

Weakness: CWE-400 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P

References