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ALPINE-CVE-2026-63076

Type: advisorySource: OSV1 source record

Issue summary: OpenSSL CMP password based protection verification only checks whether the protectionAlg parameter was not NULL and not its ASN.1 type, before treating it as a PBMParameter. A crafted message can contain a parameter of a different type, which is then dereferenced as an invalid pointer. Impact summary: A remote, unauthenticated attacker can crash an application acting as a CMP server that accepts PBM-protected messages, or a CMP client talking to a malicious or intercepted CMP server, resulting in a Denial of Service. CWE: CWE-476: NULL Pointer Dereference Description: When verifying the password-based MAC protection of a CMP message, OpenSSL library reads the protectionAlg algorithm parameter with X509_ALGOR_get0(), which returns both the parameter type and its value pointer. The value is then cast to an ASN1_STRING and treated as the expected PBMParameter after only checking that pointer is not NULL. The parameter type returned by X509_ALGOR_get0() was never consulted. This happens during protection verification, before any MAC is computed, so no knowledge of the PBM shared secret is required; the only precondition is that PBM verification is reachable. On the server side this is reached from OSSL_CMP_SRV_process_request() for any application that stands up a CMP server accepting PBM-protected messages, and on the client side from CMP response validation against a malicious or on-path (MITM) server. The reliable consequence is a denial of service; there is no

Announced Source revision 1
Original source ↗

ALPINE-CVE-2026-63076

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:ALPINE-CVE-2026-63076

openssl

Source reference: /affected/0/package/name

Affected versions
Not stated in this record
Fixed versions
3.3.7-r1

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

openssl

Source reference: /affected/1/package/name

Affected versions
Not stated in this record
Fixed versions
3.5.8-r0

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

openssl

Source reference: /affected/2/package/name

Affected versions
Not stated in this record
Fixed versions
3.5.8-r0

Source reference: /affected/2/ranges

Prerequisites
Not stated in this record

openssl

Source reference: /affected/3/package/name

Affected versions
Not stated in this record
Fixed versions
3.5.8-r0

Source reference: /affected/3/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "3.0.0"
          },
          {
            "fixed": "3.3.7-r1"
          }
        ]
      }
    ],
    "package": {
      "name": "openssl",
      "purl": "pkg:apk/alpine/openssl?arch=source",
      "ecosystem": "Alpine:v3.21"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-63076.json"
    },
    "ecosystem_specific": {}
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "3.0.0"
          },
          {
            "fixed": "3.5.8-r0"
          }
        ]
      }
    ],
    "package": {
      "name": "openssl",
      "purl": "pkg:apk/alpine/openssl?arch=source",
      "ecosystem": "Alpine:v3.22"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-63076.json"
    },
    "ecosystem_specific": {}
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "3.0.0"
          },
          {
            "fixed": "3.5.8-r0"
          }
        ]
      }
    ],
    "package": {
      "name": "openssl",
      "purl": "pkg:apk/alpine/openssl?arch=source",
      "ecosystem": "Alpine:v3.23"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-63076.json"
    },
    "ecosystem_specific": {}
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "3.0.0"
          },
          {
            "fixed": "3.5.8-r0"
          }
        ]
      }
    ],
    "package": {
      "name": "openssl",
      "purl": "pkg:apk/alpine/openssl?arch=source",
      "ecosystem": "Alpine:v3.24"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-63076.json"
    },
    "ecosystem_specific": {}
  }
]

Publisher severity

No explicit severity was provided.

Event
#54617 · Revision 1
Added to Heist Feed
Publisher date
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