GHSA-jpr7-q523-hx25: Duplicate Advisory Denial of Service Vulnerability

HIGH
Share
CVSS 7.5
CWE-834 CWE-400
Published
Advisory Summary

GHSA-jpr7-q523-hx25 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-834: Excessive Iteration) affecting Duplicate Advisory libraries in the Packagist ecosystem. The issue involves phpseclib vulnerable to denial of service. Remediation is available by upgrading affected packages to version 3.0.34.

GHSA-jpr7-q523-hx25 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-jpr7-q523-hx25
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-834: Excessive Iteration
Affected Product Duplicate Advisory
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

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

How to Fix GHSA-jpr7-q523-hx25

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

phpseclib/phpseclib fixed: 3.0.34 
Upgrade phpseclib/phpseclib to 3.0.34
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 phpseclib/phpseclib

How to Check if You Are Affected

To determine whether your application is affected by GHSA-jpr7-q523-hx25, inspect your project dependencies for Duplicate Advisory:

inspect dependencies for phpseclib/phpseclib

Analyze the terminal output to locate any version of Duplicate Advisory in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.0.34), 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-834: Excessive Iteration, where the product performs an iteration or loop without sufficiently limiting the number of times that the loop is executed. In Duplicate Advisory, 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

### Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-2f25-pfq3-c7h8. This link is maintained to preserve external references. ### Original Description In Math/BinaryField.php in phpseclib 3 before 3.0.34, excessively large degrees in binary fields can lead to a denial of service.

GHSA-jpr7-q523-hx25 Affected Duplicate Advisory Versions

1 component(s)
Fixed Versions:
3.0.34
Product / Package Ecosystem Affected Versions Fixed Version
phpseclib/phpseclib
 Packagist
≥ 3.0.0
< 3.0.34
3.0.34

References

NVD — GHSA-jpr7-q523-hx25 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-49316
Security Fix Commit FIX COMMIT
https://github.com/phpseclib/phpseclib/commit/964d78101a70305df33f442f5490f0adb3b7e77f
Duplicate Advisory Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/phpseclib/phpseclib/CVE-2023-49316.yaml
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-jpr7-q523-hx25
Duplicate Advisory Source Repository REPOSITORY
https://github.com/phpseclib/phpseclib
Duplicate Advisory Release RELEASE
https://github.com/phpseclib/phpseclib/releases/tag/3.0.34

Frequently Asked Questions

What is GHSA-jpr7-q523-hx25?
GHSA-jpr7-q523-hx25 is a security vulnerability in Duplicate Advisory involving phpseclib vulnerable to denial of service under CWE-834: Excessive Iteration.
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to 3.0.34 across affected packages: phpseclib/phpseclib.
What version fixes GHSA-jpr7-q523-hx25?
Upgrading to 3.0.34 (or the latest patched release for your respective branch) resolves the vulnerability.
Is phpseclib/phpseclib affected?
Yes, phpseclib/phpseclib is affected in releases prior to 3.0.34. Upgrade your dependency to 3.0.34 or later.
What is the CVSS score of GHSA-jpr7-q523-hx25?
GHSA-jpr7-q523-hx25 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with GHSA-jpr7-q523-hx25?
GHSA-jpr7-q523-hx25 is classified under CWE-834: Excessive Iteration (The product performs an iteration or loop without sufficiently limiting the number of times that the loop is executed.).
How can I check Packagist dependencies for GHSA-jpr7-q523-hx25?
Run the dependency tree command: 'inspect dependencies for phpseclib/phpseclib'. 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-jpr7-q523-hx25",
  "modified" : "2026-05-08T23:06:39Z",
  "published" : "2023-11-27T18:31:14Z",
  "withdrawn" : "2026-05-08T23:06:38Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: phpseclib vulnerable to denial of service",
  "details" : "### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-2f25-pfq3-c7h8. This link is maintained to preserve external references.\n\n### Original Description\nIn Math/BinaryField.php in phpseclib 3 before 3.0.34, excessively large degrees in binary fields can lead to a denial of service.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "phpseclib/phpseclib"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.0.0"
      }, {
        "fixed" : "3.0.34"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-49316"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/phpseclib/phpseclib/commit/964d78101a70305df33f442f5490f0adb3b7e77f"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/phpseclib/phpseclib/CVE-2023-49316.yaml"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-jpr7-q523-hx25"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/phpseclib/phpseclib"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/phpseclib/phpseclib/releases/tag/3.0.34"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400", "CWE-834" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-11-28T17:43:31Z",
    "nvd_published_at" : "2023-11-27T18:15:07Z"
  }
}