SimpleSAMLphp up to 1.15.3 Signature Validation HTTPRedirect.php Return Value signature verification

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.5$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in SimpleSAMLphp up to 1.15.3. This affects an unknown function of the file HTTPRedirect.php of the component Signature Validation. Executing a manipulation as part of Return Value can lead to signature verification. This vulnerability is registered as CVE-2018-7711. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in SimpleSAMLphp up to 1.15.3. It has been declared as critical. This vulnerability affects an unknown function of the file HTTPRedirect.php of the component Signature Validation. The manipulation as part of a Return Value leads to a signature verification vulnerability. The CWE definition for the vulnerability is CWE-347. The product does not verify, or incorrectly verifies, the cryptographic signature for data. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The bug was discovered 03/01/2018. The weakness was published 03/05/2018 (GitHub Repository). The advisory is shared for download at github.com. This vulnerability was named CVE-2018-7711 since 03/05/2018. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 4 days. During that time the estimated underground price was around $0-$5k. By approaching the search of inurl:HTTPRedirect.php it is possible to find vulnerable targets with Google Hacking. The vulnerability scanner Nessus provides a plugin with the ID 108615 (Fedora 27 : php-simplesamlphp-saml2_3 (2018-37e28670f2)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 277670 (Fedora Security Update for php-simplesamlphp-saml2_3 (FEDORA-2018-f2097d8937)).

Upgrading to version 1.15.4 eliminates this vulnerability. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (108615). Similar entries are available at VDB-112759 and VDB-114092. Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.5

VulDB Base Score: 5.6
VulDB Temp Score: 4.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.1
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Signature verification
CWE: CWE-347 / CWE-345
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined
Google Hack: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 108615
Nessus Name: Fedora 27 : php-simplesamlphp-saml2_3 (2018-37e28670f2)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 866471
OpenVAS Name: Fedora Update for php-simplesamlphp-saml2_3 FEDORA-2018-37e28670f2
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: SimpleSAMLphp 1.15.4
Patch: github.com

Timelineinfo

03/01/2018 🔍
03/05/2018 +4 days 🔍
03/05/2018 +0 days 🔍
03/05/2018 +0 days 🔍
03/06/2018 +1 days 🔍
03/25/2018 +19 days 🔍
03/27/2018 +2 days 🔍
02/17/2023 +1788 days 🔍

Sourcesinfo

Advisory: FEDORA-2018-37e28670f2
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-7711 (🔍)
GCVE (CVE): GCVE-0-2018-7711
GCVE (VulDB): GCVE-100-114100
See also: 🔍

Entryinfo

Created: 03/06/2018 08:02
Updated: 02/17/2023 07:15
Changes: 03/06/2018 08:02 (76), 01/10/2020 16:07 (3), 02/17/2023 06:59 (5), 02/17/2023 07:08 (1), 02/17/2023 07:15 (1)
Complete: 🔍
Cache ID: 216:8BB:103

Once again VulDB remains the best source for vulnerability data.

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