CVE-2017-12872 SimpleSAMLphp allows timing side-channel attacks
Remote attackers can exploit timing side-channels in authentication to potentially recover secret material due to insecure string comparisons.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2017-12872?
CVE-2017-12872 is a medium-severity 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 (1) Htpasswd authentication source in the authcrypt module and (2) SimpleSAML_Session class in SimpleSAMLphp 1.14.11 and earlier allow remote attackers to conduct timing side-channel attacks by leveraging use of the standard comparison operator to compare secret material against user input.
Weakness: CWE-200
Which versions are affected by CVE-2017-12872?
2 open source packages ship an affected version, including simplesamlphp/simplesamlphp. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
simplesamlphp/simplesamlphp Packagist | All versions | 1.15.0-rc1 |
simplesamlphp/simplesamlphp Packagist | All versions | 1.15.0-rc1 |
Products include Debian Debian Linux, Simplesamlphp Simplesamlphp.
How do I fix CVE-2017-12872?
Upgrade simplesamlphp/simplesamlphp to 1.15.0-rc1 or later.
Is CVE-2017-12872 being exploited?
There is no known exploitation of CVE-2017-12872 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2017-12872, GHSA-v882-949x-6v28, UBUNTU-CVE-2017-12872.