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CVE-2018-7711

UnknownEPSS 1.22%

Last modified

CVE-2018-7711 is a vulnerability of currently unknown severity. HTTPRedirect.php in the saml2 library in SimpleSAMLphp before 1.15.4 has an incorrect check of return values in the signature validation utilities, allowing an attacker to get invalid signatures accepted as valid by forcing an error during validation. This occurs because of a dependency on PHP functionality that interprets a -1 error code as a true boolean value.. EPSS estimates a 1.22% chance of exploitation in the next 30 days.

Description

HTTPRedirect.php in the saml2 library in SimpleSAMLphp before 1.15.4 has an incorrect check of return values in the signature validation utilities, allowing an attacker to get invalid signatures accepted as valid by forcing an error during validation. This occurs because of a dependency on PHP functionality that interprets a -1 error code as a true boolean value.

Metrics

EPSS Probability
1.22%

64.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
SimplesamlphpSimplesamlphp< 1.15.4
SimplesamlphpSaml2>= 1.0.0, < 1.10.6
SimplesamlphpSaml2>= 2.0.0, < 2.3.8
SimplesamlphpSaml2>= 3.0.0, < 3.1.4
DebianDebian Linux7.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2018-7711?
HTTPRedirect.php in the saml2 library in SimpleSAMLphp before 1.15.4 has an incorrect check of return values in the signature validation utilities, allowing an attacker to get invalid signatures accepted as valid by forcing an error during validation. This occurs because of a dependency on PHP functionality that interprets a -1 error code as a true boolean value.
How severe is CVE-2018-7711?
Severity scoring for CVE-2018-7711 is pending analysis. The EPSS model estimates a 1.22% probability of exploitation in the next 30 days.
How do I fix CVE-2018-7711?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST