GSD-2023-0361

Vulnerability from gsd - Updated: 2023-12-13 01:20
Details
A timing side-channel in the handling of RSA ClientKeyExchange messages was discovered in GnuTLS. This side-channel can be sufficient to recover the key encrypted in the RSA ciphertext across a network in a Bleichenbacher style attack. To achieve a successful decryption the attacker would need to send a large amount of specially crafted messages to the vulnerable server. By recovering the secret from the ClientKeyExchange message, the attacker would be able to decrypt the application data exchanged over that connection.
Aliases
Aliases
CVE-2023-0361
To clipboard 

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    "alias": "CVE-2023-0361",
    "id": "GSD-2023-0361",
    "references": [
      "https://www.debian.org/security/2023/dsa-5349",
      "https://advisories.mageia.org/CVE-2023-0361.html",
      "https://www.suse.com/security/cve/CVE-2023-0361.html",
      "https://ubuntu.com/security/CVE-2023-0361",
      "https://access.redhat.com/errata/RHSA-2023:1141"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2023-0361"
      ],
      "details": "A timing side-channel in the handling of RSA ClientKeyExchange messages was discovered in GnuTLS. This side-channel can be sufficient to recover the key encrypted in the RSA ciphertext across a network in a Bleichenbacher style attack. To achieve a successful decryption the attacker would need to send a large amount of specially crafted messages to the vulnerable server. By recovering the secret from the ClientKeyExchange message, the attacker would be able to decrypt the application data exchanged over that connection.",
      "id": "GSD-2023-0361",
      "modified": "2023-12-13T01:20:22.965371Z",
      "schema_version": "1.4.0"
    }
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      "impact": {
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 2.2,
          "impactScore": 5.2
        }
      },
      "lastModifiedDate": "2023-07-25T15:15Z",
      "publishedDate": "2023-02-15T18:15Z"
    }
  }
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.