CVE-2020-5226

NameCVE-2020-5226
DescriptionCross-site scripting in SimpleSAMLphp before version 1.18.4. The www/erroreport.php script allows error reports to be submitted and sent to the system administrator. Starting with SimpleSAMLphp 1.18.0, a new SimpleSAML\Utils\EMail class was introduced to handle sending emails, implemented as a wrapper of an external dependency. This new wrapper allows us to use Twig templates in order to create the email sent with an error report. Since Twig provides automatic escaping of variables, manual escaping of the free-text field in www/errorreport.php was removed to avoid double escaping. However, for those not using the new user interface yet, an email template is hardcoded into the class itself in plain PHP. Since no escaping is provided in this template, it is then possible to inject HTML inside the template by manually crafting the contents of the free-text field.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitylow

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
simplesamlphp (PTS)stretch (security), stretch1.14.11-1+deb9u2fixed
buster1.16.3-1+deb10u2fixed
buster (security)1.16.3-1+deb10u1fixed
bullseye, sid1.18.8-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
simplesamlphpsourcejessie(not affected)
simplesamlphpsourcestretch(not affected)
simplesamlphpsourcebuster(not affected)
simplesamlphpsource(unstable)1.18.4-1

Notes

[buster] - simplesamlphp <not-affected> (Vulnerable code introduced later)
[stretch] - simplesamlphp <not-affected> (Vulnerable code introduced later)
[jessie] - simplesamlphp <not-affected> (Vulnerable code introduced later)
https://github.com/simplesamlphp/simplesamlphp/security/advisories/GHSA-mj9p-v2r8-wf8w
https://simplesamlphp.org/security/202001-01

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