Is CVE-2018-7711 in the CISA KEV catalog?

No. CVE-2018-7711 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-7711?

CVE-2018-7711 has a CVSS v3 base score of 8.1 (HIGH).

What is the EPSS score for CVE-2018-7711?

CVE-2018-7711 has an EPSS score of 1.22% (65th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-7711?

Upgrade simplesamlphp on debian 11 to 1.15.4-1 or later.

CVE & CISA-KEV Catalog

CVE-2018-7711

HIGH

8.1

CVSS v3

NVD

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.

CWE-347

How to fix

Remediation Available

simplesamlphpDebian

Fixed in:1.15.4-1CVE-2018-7711

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

1.22%probability of exploitation in 30 days

65thpercentile

Moderate risk: more likely to be exploited than 65% of all known CVEs.

References

Patch1

github.com

Vendor Advisory1

simplesamlphp.org

Third-Party Advisory1

lists.debian.org

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.