CVE-2017-12870 SimpleSAMLphp Unauthenticated encryption in CBC mode
Man-in-the-middle attackers can obtain sensitive session identifiers due to weak encryption in SimpleSAMLphp when communicating with non-HTTPS service providers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2017-12870?
CVE-2017-12870 is a medium-severity vulnerability in n/a, published on 1 Sep 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
SimpleSAMLphp 1.14.12 and earlier make it easier for man-in-the-middle attackers to obtain sensitive information by leveraging use of the aesEncrypt and aesDecrypt methods in the SimpleSAML/Utils/Crypto class to protect session identifiers in replies to non-HTTPS service providers.
Weakness: CWE-200
Which versions are affected by CVE-2017-12870?
2 open source packages ship an affected version, including simplesamlphp/simplesamlphp. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
simplesamlphp/simplesamlphp Packagist | All versions | 1.14.13 |
simplesamlphp/simplesamlphp Packagist | All versions | 1.14.13 |
Products include Simplesamlphp Simplesamlphp.
How do I fix CVE-2017-12870?
Upgrade simplesamlphp/simplesamlphp to 1.14.13 or later.
Is CVE-2017-12870 being exploited?
There is no known exploitation of CVE-2017-12870 in the wild and no public exploit code.
Other vulnerabilities in n/a
- CVE-2017-12868 SimpleSAMLphp Session fixation issue and authentication bypass in the authcrypt module
- CVE-2018-7644 SimpleSAMLphp Improper Verification of Cryptographic Signature
- CVE-2026-49284 SimpleSAMLphp SP accepts a response from an unexpected IdP when unsigned `Response/InResponseTo` is combined with a signed assertion lacking `SubjectConfirmationData/InResponseTo`
- CVE-2018-6520 SimpleSAMLphp Open redirection protection bypass
- CVE-2017-12871 SimpleSAMLphp Incorrect IV generation for encryption
Sources
Also known as DEBIAN-CVE-2017-12870, GHSA-44pr-mgcp-v36r, UBUNTU-CVE-2017-12870.