CVE-2023-29530: Laminas/laminas diactoros HTTP Multiline Header Termination Vulnerability

HIGH
Advisory Identifier: GHSA-xv3h-4844-9h36
CVSS 7.5
CWE-20
Published
Advisory Summary

CVE-2023-29530 is a HIGH (CVSS 7.5) http multiline header termination vulnerability (CWE-20: Improper Input Validation) affecting Laminas/laminas diactoros libraries in the Packagist ecosystem. The issue involves http multiline header termination. Remediation is available by upgrading affected packages to version 2.18.1, 2.19.1, 2.20.1, 2.21.1, 2.22.1, 2.23.1, 2.24.2, 2.25.2.

CVE-2023-29530 at a Glance

CVE Identifier CVE-2023-29530
GHSA Identifier GHSA-xv3h-4844-9h36
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-20: Improper Input Validation
Affected Product Laminas/laminas diactoros
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 CVE-2023-29530

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

laminas/laminas-diactoros fixed: 2.18.1
Upgrade laminas/laminas-diactoros to 2.18.1
laminas/laminas-diactoros fixed: 2.19.1
Upgrade laminas/laminas-diactoros to 2.19.1
laminas/laminas-diactoros fixed: 2.20.1
Upgrade laminas/laminas-diactoros to 2.20.1
laminas/laminas-diactoros fixed: 2.21.1
Upgrade laminas/laminas-diactoros to 2.21.1
laminas/laminas-diactoros fixed: 2.22.1
Upgrade laminas/laminas-diactoros to 2.22.1
laminas/laminas-diactoros fixed: 2.23.1
Upgrade laminas/laminas-diactoros to 2.23.1
laminas/laminas-diactoros fixed: 2.24.2
Upgrade laminas/laminas-diactoros to 2.24.2
laminas/laminas-diactoros fixed: 2.25.2
Upgrade laminas/laminas-diactoros to 2.25.2
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 laminas/laminas-diactoros

How to Check if You Are Affected

To determine whether your application is affected by CVE-2023-29530, inspect your project dependencies for Laminas/laminas diactoros:

inspect dependencies for laminas/laminas-diactoros

Analyze the terminal output to locate any version of Laminas/laminas diactoros in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.18.1), 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-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. In Laminas/laminas diactoros, 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

### Impact Affected versions of Laminas Diactoros accepted a single line feed (LF / `\n` ) character at the end of a header name. When serializing such a header name containing a line-feed into the on-the-wire representation of a HTTP/1.x message, the resulting message would be syntactically invalid, due to the header line being terminated too early. An attacker that is able to control the header names that are passed to Laminas Diactoros would be able to intentionally craft invalid messages, possibly causing application errors or invalid HTTP requests being sent out with an PSR-18 HTTP client. The latter might present a denial of service vector if a remote service’s web application firewall bans the application due to the receipt of malformed requests. ### Patches The problem has been patched in the following versions: - 2.18.1 - 2.19.1 - 2.20.1 - 2.21.1 - 2.22.1 - 2.23.1 - 2.24.2 - 2.25.2 ### Workarounds Validate HTTP header keys and/or values, and if using user-supplied values, filter them to strip off leading or trailing newline characters before calling `withHeader()`. ### References - CVE-2023-29197 - GHSA-wxmh-65f7-jcvw

CVE-2023-29530 Affected Laminas/laminas diactoros Versions

8 component(s)
Fixed Versions:
2.18.12.19.12.20.12.21.12.22.12.23.12.24.22.25.2
Product / Package Ecosystem Affected Versions Fixed Version
laminas/laminas-diactoros
Packagist
< 2.18.1
2.18.1
laminas/laminas-diactoros
Packagist
≥ 2.19.0
< 2.19.1
All 1 versions
2.19.0
2.19.1
laminas/laminas-diactoros
Packagist
≥ 2.20.0
< 2.20.1
All 1 versions
2.20.0
2.20.1
laminas/laminas-diactoros
Packagist
≥ 2.21.0
< 2.21.1
All 1 versions
2.21.0
2.21.1
laminas/laminas-diactoros
Packagist
≥ 2.22.0
< 2.22.1
All 1 versions
2.22.0
2.22.1
laminas/laminas-diactoros
Packagist
≥ 2.23.0
< 2.23.1
All 1 versions
2.23.0
2.23.1
laminas/laminas-diactoros
Packagist
≥ 2.24.0
< 2.24.2
2.24.2
laminas/laminas-diactoros
Packagist
≥ 2.25.0
< 2.25.2
2.25.2

References

Frequently Asked Questions

What is CVE-2023-29530?
CVE-2023-29530 is a security vulnerability in Laminas/laminas diactoros involving HTTP Multiline Header Termination under CWE-20: Improper Input Validation.
Which Laminas/laminas diactoros versions are affected?
Affected versions include releases prior to 2.18.1, 2.19.1, 2.20.1, 2.21.1, 2.22.1, 2.23.1, 2.24.2, 2.25.2 across affected packages: laminas/laminas-diactoros.
What version fixes CVE-2023-29530?
Upgrading to 2.18.1, 2.19.1, 2.20.1, 2.21.1, 2.22.1, 2.23.1, 2.24.2, 2.25.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is laminas/laminas-diactoros affected?
Yes, laminas/laminas-diactoros is affected in releases prior to 2.18.1, 2.19.1, 2.20.1, 2.21.1, 2.22.1, 2.23.1, 2.24.2, 2.25.2. Upgrade your dependency to 2.18.1, 2.19.1, 2.20.1, 2.21.1, 2.22.1, 2.23.1, 2.24.2, 2.25.2 or later.
What is the CVSS score of CVE-2023-29530?
CVE-2023-29530 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 CVE-2023-29530?
CVE-2023-29530 is classified under CWE-20: Improper Input Validation (The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.).
How can I check Packagist dependencies for CVE-2023-29530?
Run the dependency tree command: 'inspect dependencies for laminas/laminas-diactoros'. 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
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-xv3h-4844-9h36",
  "modified" : "2023-04-28T20:07:40Z",
  "published" : "2023-04-24T22:42:39Z",
  "aliases" : [ "CVE-2023-29530" ],
  "summary" : "HTTP Multiline Header Termination",
  "details" : "### Impact\n\nAffected versions of Laminas Diactoros accepted a single line feed (LF / `\\n` ) character at the end of a header name. When serializing such a header name containing a line-feed into the on-the-wire representation of a HTTP/1.x message, the resulting message would be syntactically invalid, due to the header line being terminated too early. An attacker that is able to control the header names that are passed to Laminas Diactoros would be able to intentionally craft invalid messages, possibly causing application errors or invalid HTTP requests being sent out with an PSR-18 HTTP client. The latter might present a denial of service vector if a remote service’s web application firewall bans the application due to the receipt of malformed requests.\n\n### Patches\n\nThe problem has been patched in the following versions:\n\n- 2.18.1\n- 2.19.1\n- 2.20.1\n- 2.21.1\n- 2.22.1\n- 2.23.1\n- 2.24.2\n- 2.25.2\n\n### Workarounds\n\nValidate HTTP header keys and/or values, and if using user-supplied values, filter them to strip off leading or trailing newline characters before calling `withHeader()`.\n\n### References\n\n- CVE-2023-29197\n- GHSA-wxmh-65f7-jcvw",
  "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" : "laminas/laminas-diactoros"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.18.1"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "laminas/laminas-diactoros"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.19.0"
      }, {
        "fixed" : "2.19.1"
      } ]
    } ],
    "versions" : [ "2.19.0" ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "laminas/laminas-diactoros"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.20.0"
      }, {
        "fixed" : "2.20.1"
      } ]
    } ],
    "versions" : [ "2.20.0" ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "laminas/laminas-diactoros"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.21.0"
      }, {
        "fixed" : "2.21.1"
      } ]
    } ],
    "versions" : [ "2.21.0" ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "laminas/laminas-diactoros"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.22.0"
      }, {
        "fixed" : "2.22.1"
      } ]
    } ],
    "versions" : [ "2.22.0" ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "laminas/laminas-diactoros"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.23.0"
      }, {
        "fixed" : "2.23.1"
      } ]
    } ],
    "versions" : [ "2.23.0" ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "laminas/laminas-diactoros"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.24.0"
      }, {
        "fixed" : "2.24.2"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "laminas/laminas-diactoros"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.25.0"
      }, {
        "fixed" : "2.25.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/laminas/laminas-diactoros/security/advisories/GHSA-xv3h-4844-9h36"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-29530"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/laminas/laminas-diactoros/commit/7e721a60a09c5119c98694c2d23fc031094e1f1c"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-wxmh-65f7-jcvw"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/laminas/laminas-diactoros"
  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BPW54QK7ISDALPLP2CKODU4ZIVRYS336"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-04-24T22:42:39Z",
    "nvd_published_at" : "2023-04-24T20:15:08Z"
  }
}