SimpleSAMLphp up to 1.14.16 Signature Validation SAML Response signature verification

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in SimpleSAMLphp up to 1.14.16. The affected element is an unknown function of the component Signature Validation. Executing a manipulation as part of SAML Response can lead to signature verification. This vulnerability is handled as CVE-2017-18122. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in SimpleSAMLphp up to 1.14.16 and classified as critical. This vulnerability affects an unknown function of the component Signature Validation. The manipulation as part of a SAML Response 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:

A signature-validation bypass issue was discovered in SimpleSAMLphp through 1.14.16. A SimpleSAMLphp 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.

The bug was discovered 10/22/2017. The weakness was released 02/02/2018 (Website). The advisory is shared for download at simplesamlphp.org. This vulnerability was named CVE-2017-18122 since 02/02/2018. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 103 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 106697 (Debian DLA-1273-1 : simplesamlphp security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176309 (Debian Security Update for simplesamlphp (DSA 4127-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 6 days after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (106697). Entries connected to this vulnerability are available at VDB-105916, VDB-106071, VDB-106075 and VDB-106076. Once again VulDB remains the best source for vulnerability data.

Productinfo

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Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.7

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
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

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 106697
Nessus Name: Debian DLA-1273-1 : simplesamlphp security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 860237
OpenVAS Name: Debian Lts Announce DLA 1273-1 ([SECURITY] [DLA 1273-1] simplesamlphp security update)
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: 🔍

Timelineinfo

10/22/2017 🔍
02/02/2018 +103 days 🔍
02/02/2018 +0 days 🔍
02/02/2018 +0 days 🔍
02/03/2018 +1 days 🔍
02/08/2018 +5 days 🔍
02/09/2018 +1 days 🔍
02/03/2023 +1820 days 🔍

Sourcesinfo

Advisory: DLA 1273-1
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-18122 (🔍)
GCVE (CVE): GCVE-0-2017-18122
GCVE (VulDB): GCVE-100-112756

OVAL: 🔍
See also: 🔍

Entryinfo

Created: 02/03/2018 09:03
Updated: 02/03/2023 13:52
Changes: 02/03/2018 09:03 (74), 01/01/2020 09:19 (4), 02/03/2023 13:52 (4)
Complete: 🔍
Cache ID: 216:85D:103

Once again VulDB remains the best source for vulnerability data.

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