CVE-2017-12869 SimpleSAMLphp Authentication context bypass in the multiauth module
Remote attackers can bypass authentication context restrictions in SimpleSAMLphp to use unauthorized authentication sources due to improper input validation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2017-12869?
CVE-2017-12869 is a high-severity authentication bypass vulnerability in Debian Debian Linux, published on 1 Sep 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The multiauth module in SimpleSAMLphp 1.14.13 and earlier allows remote attackers to bypass authentication context restrictions and use an authentication source defined in config/authsources.php via vectors related to improper validation of user input.
Weakness: CWE-20
Which versions are affected by CVE-2017-12869?
2 open source packages ship an affected version, including simplesamlphp/simplesamlphp. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
simplesamlphp/simplesamlphp Packagist | All versions | 1.14.14 |
simplesamlphp/simplesamlphp Packagist | All versions | 1.14.14 |
Products include Debian Debian Linux, Simplesamlphp Simplesamlphp.
How do I fix CVE-2017-12869?
Upgrade simplesamlphp/simplesamlphp to 1.14.14 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2017-12869 being exploited?
There is no known exploitation of CVE-2017-12869 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2017-12869, GHSA-qc43-78vj-vg7p, UBUNTU-CVE-2017-12869.