CVE-2016-9955 Incorrect signature verification in SimpleSAMLphp
Remote attackers can spoof SAML signatures or cause denial of service via improper boolean conversion in SimpleSAMLphp.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2016-9955?
CVE-2016-9955 is a medium-severity vulnerability in Debian Debian Linux, published on 16 Feb 2017. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
The SimpleSAML_XML_Validator class constructor in SimpleSAMLphp before 1.14.11 might allow remote attackers to spoof signatures on SAML 1 responses or possibly cause a denial of service (memory consumption) by leveraging improper conversion of return values to boolean.
Weakness: CWE-20
Which versions are affected by CVE-2016-9955?
2 open source packages ship an affected version, including simplesamlphp/simplesamlphp. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
simplesamlphp/simplesamlphp Packagist | All versions | 1.14.11 |
simplesamlphp/simplesamlphp Packagist | All versions | 1.14.11 |
Products include Debian Debian Linux, Simplesamlphp Simplesamlphp.
How do I fix CVE-2016-9955?
Upgrade simplesamlphp/simplesamlphp to 1.14.11 or later.
Is CVE-2016-9955 being exploited?
There is no known exploitation of CVE-2016-9955 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2016-9955, GHSA-p9cm-r7jg-8q3g, UBUNTU-CVE-2016-9955.