CVE-2017-12871: Simplesamlphp/simplesamlphp SimpleSAMLphp Incorrect IV Generation For Vulnerability

MODERATE
Advisory Identifier: GHSA-ww3w-592j-5qrw
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CVSS 5.9
CWE-326
Published
Advisory Summary

CVE-2017-12871 is a MODERATE (CVSS 5.9) simplesamlphp incorrect iv generation for vulnerability (CWE-326: Inadequate Encryption Strength) affecting Simplesamlphp/simplesamlphp libraries in the Packagist ecosystem. The issue involves simplesamlphp incorrect iv generation for encryption. Remediation is available by upgrading affected packages to version 1.14.12.

CVE-2017-12871 at a Glance

CVE Identifier CVE-2017-12871
GHSA Identifier GHSA-ww3w-592j-5qrw
Severity MODERATE
CVSS v3.1 Base Score 5.9
CWE Classification CWE-326: Inadequate Encryption Strength
Affected Product Simplesamlphp/simplesamlphp
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 5.9

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2017-12871

To remediate this vulnerability, upgrade all affected Simplesamlphp/simplesamlphp dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

simplesamlphp/simplesamlphp fixed: 1.14.12 
Upgrade simplesamlphp/simplesamlphp to 1.14.12
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for simplesamlphp/simplesamlphp

How to Check if You Are Affected

To determine whether your application is affected by CVE-2017-12871, inspect your project dependencies for Simplesamlphp/simplesamlphp:

inspect dependencies for simplesamlphp/simplesamlphp

Analyze the terminal output to locate any version of Simplesamlphp/simplesamlphp in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.14.12), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-326: Inadequate Encryption Strength, where the product stores or transmits sensitive data using an encryption scheme that is theoretically sound, but is not strong enough for the level of protection required. In Simplesamlphp/simplesamlphp, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

The aesEncrypt method in `lib/SimpleSAML/Utils/Crypto.php` in SimpleSAMLphp 1.14.x through 1.14.11 makes it easier for context-dependent attackers to bypass the encryption protection mechanism by leveraging use of the first 16 bytes of the secret key as the initialization vector (IV).

CVE-2017-12871 Affected Simplesamlphp/simplesamlphp Versions

1 component(s)
Fixed Versions:
1.14.12
Product / Package Ecosystem Affected Versions Fixed Version
simplesamlphp/simplesamlphp
 Packagist
≥ 1.14.0
< 1.14.12
1.14.12

References

NVD — CVE-2017-12871 NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-12871
Security Fix Commit FIX COMMIT
https://github.com/simplesamlphp/simplesamlphp/commit/77df6a932d46daa35e364925eb73a175010dc904
Security Fix Commit FIX COMMIT
https://github.com/simplesamlphp/simplesamlphp/commit/ccf75981187aa88f7165abdb1b1965c0934acda0
Simplesamlphp/simplesamlphp Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/simplesamlphp/simplesamlphp/CVE-2017-12871.yaml
Simplesamlphp/simplesamlphp Source Repository REPOSITORY
https://github.com/simplesamlphp/simplesamlphp
Simplesamlphp/simplesamlphp Security Information SECURITY
https://simplesamlphp.org/security/201703-02

Frequently Asked Questions

What is CVE-2017-12871?
CVE-2017-12871 is a security vulnerability in Simplesamlphp/simplesamlphp involving SimpleSAMLphp Incorrect IV generation for encryption under CWE-326: Inadequate Encryption Strength.
Which Simplesamlphp/simplesamlphp versions are affected?
Affected versions include releases prior to 1.14.12 across affected packages: simplesamlphp/simplesamlphp.
What version fixes CVE-2017-12871?
Upgrading to 1.14.12 (or the latest patched release for your respective branch) resolves the vulnerability.
Is simplesamlphp/simplesamlphp affected?
Yes, simplesamlphp/simplesamlphp is affected in releases prior to 1.14.12. Upgrade your dependency to 1.14.12 or later.
What is the CVSS score of CVE-2017-12871?
CVE-2017-12871 has a CVSS v3.1 base score of 5.9 (MODERATE) with vector string CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2017-12871?
CVE-2017-12871 is classified under CWE-326: Inadequate Encryption Strength (The product stores or transmits sensitive data using an encryption scheme that is theoretically sound, but is not strong enough for the level of protection required.).
How can I check Packagist dependencies for CVE-2017-12871?
Run the dependency tree command: 'inspect dependencies for simplesamlphp/simplesamlphp'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-ww3w-592j-5qrw",
  "modified" : "2024-04-25T21:00:11Z",
  "published" : "2022-05-17T01:17:12Z",
  "aliases" : [ "CVE-2017-12871" ],
  "summary" : "SimpleSAMLphp Incorrect IV generation for encryption",
  "details" : "The aesEncrypt method in `lib/SimpleSAML/Utils/Crypto.php` in SimpleSAMLphp 1.14.x through 1.14.11 makes it easier for context-dependent attackers to bypass the encryption protection mechanism by leveraging use of the first 16 bytes of the secret key as the initialization vector (IV).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "simplesamlphp/simplesamlphp"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.14.0"
      }, {
        "fixed" : "1.14.12"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2017-12871"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/simplesamlphp/simplesamlphp/commit/77df6a932d46daa35e364925eb73a175010dc904"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/simplesamlphp/simplesamlphp/commit/ccf75981187aa88f7165abdb1b1965c0934acda0"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/simplesamlphp/simplesamlphp/CVE-2017-12871.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/simplesamlphp/simplesamlphp"
  }, {
    "type" : "WEB",
    "url" : "https://simplesamlphp.org/security/201703-02"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-326" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-04-25T21:00:11Z",
    "nvd_published_at" : "2017-09-01T21:29:00Z"
  }
}