Debian DLA-1273-1 : simplesamlphp security update
High Nessus Plugin ID 106697
SynopsisThe remote Debian host is missing a security update.
Descriptionsimplesamlphp, an authentication and federation application has been found vulnerable to Cross Site Scripting (XSS), signature validation byepass and using insecure connection charset.
A signature-validation bypass issue was discovered in SimpleSAMLphp through 1.14.16. Service Provider using SAML 1.1 will regard as valid any unsigned SAML response containing more than one signed assertion, provided that the signature of at least one of the assertions is valid. Attributes contained in all the assertions received will be merged and the entityID of the first assertion received will be used, allowing an attacker to impersonate any user of any IdP given an assertion signed by the targeted IdP.
The sqlauth module in SimpleSAMLphp before 1.15.2 relies on the MySQL utf8 charset, which truncates queries upon encountering four-byte characters. There might be a scenario in which this allows remote attackers to bypass intended access restrictions.
For Debian 7 'Wheezy', these problems have been fixed in version 1.9.2-1+deb7u2.
We recommend that you upgrade your simplesamlphp packages.
NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
SolutionUpgrade the affected simplesamlphp package.