Improper Verification of Cryptographic Signature in SimpleSAMLphp SimpleSAMLphp
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2018-7644 |
| CWE-ID | CWE-347 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
SimpleSAMLphp Web applications / Other software |
| Vendor | SimpleSAMLphp |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Improper Verification of Cryptographic Signature
EUVDB-ID: #VU31347
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2018-7644
CWE-ID:
CWE-347 - Improper Verification of Cryptographic Signature
Exploit availability: No
DescriptionThe vulnerability allows a remote non-authenticated attacker to manipulate data.
The XmlSecLibs library as used in the saml2 library in SimpleSAMLphp before 1.15.3 incorrectly verifies signatures on SAML assertions, allowing a remote attacker to construct a crafted SAML assertion on behalf of an Identity Provider that would pass as cryptographically valid, thereby allowing them to impersonate a user from that Identity Provider, aka a key confusion issue.
MitigationInstall update from vendor's website.
Vulnerable software versionsSimpleSAMLphp: 1.15.0 - 1.15.2
External linkshttp://simplesamlphp.org/security/201802-01
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
