The sqlauth module in SimpleSAMLphp before 1.15.2 relies on the MySQL utf8 charset, which truncates queries upon encountering four-byte characters. There might be a scenario in which this allows remote attackers to bypass intended access restrictions.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - The sqlauth module in SimpleSAMLphp before 1.15.2 relies on the MySQL utf8 charset, which truncates     queries upon encountering four-byte characters. There might be a scenario in which this allows remote     attackers to bypass intended access restrictions. (CVE-2018-6521)

Note that Nessus relies on the presence of the package as reported by the vendor.

Several vulnerabilities have been discovered in SimpleSAMLphp, a framework for authentication, primarily via the SAML protocol.

  - CVE-2017-12867     Attackers with access to a secret token could extend its     validity period by manipulating the prepended time     offset.

  - CVE-2017-12869     When using the multiauth module, attackers can bypass     authentication context restrictions and use any     authentication source defined in the config.

  - CVE-2017-12873     Defensive measures have been taken to prevent the     administrator from misconfiguring persistent NameIDs to     avoid identifier clash. (Affects Debian 8 Jessie only.)

  - CVE-2017-12874     The InfoCard module could accept incorrectly signed XML     messages in rare occasions.

  - CVE-2017-18121     The consentAdmin module was vulnerable to a Cross-Site     Scripting attack, allowing an attacker to craft links     that could execute arbitrary JavaScript code in the     victim's browser.

  - CVE-2017-18122     The (deprecated) SAML 1.1 implementation would regard as     valid any unsigned SAML response containing more than     one signed assertion, provided that the signature of at     least one of the assertions was valid, allowing an     attacker that could obtain a valid signed assertion from     an IdP to impersonate users from that IdP.

  - CVE-2018-6519     Regular expression denial of service when parsing     extraordinarily long timestamps.

  - CVE-2018-6521     Change sqlauth module MySQL charset from utf8 to utf8mb     to prevent theoretical query truncation that could allow     remote attackers to bypass intended access restrictions

  - CVE-2018-7644     Critical signature validation vulnerability.

simplesamlphp, an authentication and federation application has been found vulnerable to Cross Site Scripting (XSS), signature validation byepass and using insecure connection charset.

CVE-2017-18121

A Cross Site Scripting (XSS) issue has been found in the consentAdmin module of SimpleSAMLphp through 1.14.15, allowing an attacker to manually craft links that a victim can open, executing arbitrary JavaScript code.

CVE-2017-18122

A signature-validation bypass issue was discovered in SimpleSAMLphp through 1.14.16. Service Provider using SAML 1.1 will regard as valid any unsigned SAML response containing more than one signed assertion, provided that the signature of at least one of the assertions is valid. Attributes contained in all the assertions received will be merged and the entityID of the first assertion received will be used, allowing an attacker to impersonate any user of any IdP given an assertion signed by the targeted IdP.

CVE-2018-6521

The sqlauth module in SimpleSAMLphp before 1.15.2 relies on the MySQL utf8 charset, which truncates queries upon encountering four-byte characters. There might be a scenario in which this allows remote attackers to bypass intended access restrictions.

For Debian 7 'Wheezy', these problems have been fixed in version 1.9.2-1+deb7u2.

We recommend that you upgrade your simplesamlphp packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
250720	Linux Distros Unpatched Vulnerability : CVE-2018-6521	Nessus	Misc.	critical
107119	Debian DSA-4127-1 : simplesamlphp - security update	Nessus	Debian Local Security Checks	critical
106697	Debian DLA-1273-1 : simplesamlphp security update	Nessus	Debian Local Security Checks	critical

Detections

Analytics

CVE-2018-6521

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Tenable Plugins

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