Description
The validateSignature method in the SAML2\Utils class in SimpleSAMLphp before 1.14.10 and simplesamlphp/saml2 library before 1.9.1, 1.10.x before 1.10.3, and 2.x before 2.3.3 allows remote attackers to spoof SAML responses or possibly cause a denial of service (memory consumption) by leveraging improper conversion of return values to boolean.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | simplesamlphp | 1.14.10-1 | — |
| Debian 12 | simplesamlphp | 1.14.10-1 | — |
| Debian 7 | simplesamlphp | 1.9.2-1+deb7u3 | DLA-1298-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | simplesamlphp | No fix yet | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Packagist | simplesamlphp/saml2 | >= 1.10, < 1.10.3 | 1.10.3 | GHSA-r8v4-7vwj-983x |
| Packagist | simplesamlphp/saml2 | < 1.8.1 | 1.8.1 | GHSA-r8v4-7vwj-983x |
| Packagist | simplesamlphp/saml2 | >= 1.9.0, < 1.9.1 | 1.9.1 | GHSA-r8v4-7vwj-983x |
| Packagist | simplesamlphp/saml2 | >= 2.0, < 2.3.3 | 2.3.3 | GHSA-r8v4-7vwj-983x |
Advisories 1
- DLA-1298-1 simplesamlphp - security update Debian Security (DSA / DLA) · Mar 9, 2026