GHSA-JV46-XFWM-36J7严重已审查

Relyra SAML SignatureValue not cryptographically verified -> authentication bypass

OSV 1.4.0 · github-reviewed · 修改于 2026-06-27 05:05

发布时间

2026-06-27 05:05

GitHub 审查时间

2026-06-27 05:05

NVD 发布时间

2026-06-19 05:16

源文件

advisories/github-reviewed/2026/06/GHSA-jv46-xfwm-36j7/GHSA-jv46-xfwm-36j7.json

公告说明

Summary

Relyra 1.0.0 and 1.1.0 accept forged SAML signatures because SignatureValue was not cryptographically verified before the library returned a successful authentication result.

Details

In 1.0.0 and 1.1.0, the XMLDSig trust boundary was incomplete. :public_key.verify over the exclusive-C14N canonicalized SignedInfo was not performed against the configured IdP certificate's public key, DigestValue was not recomputed over the canonicalized referenced element, and canonicalize/2 remained an unused passthrough in the signature-verification path. The result was a structure-only acceptance path where document shape and trust-source rejection could succeed without proving the signature bytes.

Impact

A forged SignatureValue carrying an attacker-controlled NameID can be accepted as {:ok}. Any relying-party application using Relyra 1.0.0 or 1.1.0 can be logged into as an arbitrary user if it trusts the affected response path.

Patches

Relyra 1.2.0 closes the gap with real exclusive-C14N canonicalization, :public_key.verify against the configured IdP certificate's public key, and a constant-time DigestValue recompute/compare bound to the exact consumed node on both verify/4 and verify_metadata_root/4.

Workarounds

There is no safe configuration of 1.0.0 or 1.1.0. Upgrade to 1.2.0 or later.

Resources

Fix commit 2e45689 (wire real XMLDSig crypto into the candidate arm)
Fix commit 8910200 (close metadata trust bypass, pin over DER)
Regression proof: test/security/xml/adversarial_crypto_test.exs, test/relyra/metadata/auto_refresh_test.exs, test/security/ci_gate_integrity_test.exs

标识信息

别名 / CVE

CVE-2026-49454

CWE

CWE-287CWE-347

软件生态

Hex

扩展资料

暂无扩展资料。

CVSS 评分

CVSS_V3

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

原始 OSV JSON

{
  "id": "GHSA-jv46-xfwm-36j7",
  "aliases": [
    "CVE-2026-49454"
  ],
  "details": "## Summary\n\nRelyra `1.0.0` and `1.1.0` accept forged SAML signatures because `SignatureValue` was not cryptographically verified before the library returned a successful authentication result.\n\n## Details\n\nIn `1.0.0` and `1.1.0`, the XMLDSig trust boundary was incomplete. `:public_key.verify` over the exclusive-C14N canonicalized `SignedInfo` was not performed against the configured IdP certificate's public key, `DigestValue` was not recomputed over the canonicalized referenced element, and `canonicalize/2` remained an unused passthrough in the signature-verification path. The result was a structure-only acceptance path where document shape and trust-source rejection could succeed without proving the signature bytes.\n\n## Impact\n\nA forged `SignatureValue` carrying an attacker-controlled `NameID` can be accepted as `{:ok}`. Any relying-party application using Relyra `1.0.0` or `1.1.0` can be logged into as an arbitrary user if it trusts the affected response path.\n\n## Patches\n\nRelyra `1.2.0` closes the gap with real exclusive-C14N canonicalization, `:public_key.verify` against the configured IdP certificate's public key, and a constant-time `DigestValue` recompute/compare bound to the exact consumed node on both `verify/4` and `verify_metadata_root/4`.\n\n## Workarounds\n\nThere is no safe configuration of `1.0.0` or `1.1.0`. Upgrade to `1.2.0` or later.\n\n## Resources\n\n- Fix commit `2e45689` (wire real XMLDSig crypto into the candidate arm)\n- Fix commit `8910200` (close metadata trust bypass, pin over DER)\n- Regression proof: `test/security/xml/adversarial_crypto_test.exs`, `test/relyra/metadata/auto_refresh_test.exs`, `test/security/ci_gate_integrity_test.exs`",
  "summary": "Relyra SAML SignatureValue not cryptographically verified -> authentication bypass",
  "affected": [
    {
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "1.0.0"
            },
            {
              "fixed": "1.2.0"
            }
          ]
        }
      ],
      "package": {
        "name": "relyra",
        "ecosystem": "Hex"
      }
    }
  ],
  "modified": "2026-06-26T21:05:13Z",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
    }
  ],
  "published": "2026-06-26T21:05:13Z",
  "references": [
    {
      "url": "https://github.com/szTheory/relyra/security/advisories/GHSA-jv46-xfwm-36j7",
      "type": "WEB"
    },
    {
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-49454",
      "type": "ADVISORY"
    },
    {
      "url": "https://github.com/szTheory/relyra/commit/2e456897af3158c175bb490ce7fc51d6241c8922",
      "type": "WEB"
    },
    {
      "url": "https://github.com/szTheory/relyra/commit/8910200",
      "type": "WEB"
    },
    {
      "url": "https://github.com/szTheory/relyra",
      "type": "PACKAGE"
    }
  ],
  "schema_version": "1.4.0",
  "database_specific": {
    "cwe_ids": [
      "CWE-287",
      "CWE-347"
    ],
    "severity": "CRITICAL",
    "github_reviewed": true,
    "nvd_published_at": "2026-06-18T21:16:29Z",
    "github_reviewed_at": "2026-06-26T21:05:13Z"
  }
}