{
  "document": {
    "aggregate_severity": {
      "text": "Medium"
    },
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "TuxCare License Agreement",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.",
        "title": "Terms of Use"
      }
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      "contact_details": "https://tuxcare.com/contact/",
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      "generator": {
        "date": "2026-06-12T16:34:33Z",
        "engine": {
          "name": "pyCSAF"
        }
      },
      "id": "CVE-2023-1255-ELS_ALT_COMMON-DEBIAN11",
      "initial_release_date": "2023-04-20T17:15:00Z",
      "revision_history": [
        {
          "date": "2023-04-20T17:15:00Z",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2026-06-12T16:34:33Z",
          "number": "2",
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        }
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      "status": "final",
      "version": "2"
    },
    "title": "Security update on CVE-2023-1255"
  },
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  "vulnerabilities": [
    {
      "cve": "CVE-2023-1255",
      "cwe": {
        "id": "CWE-125",
        "name": "Out-of-bounds Read"
      },
      "notes": [
        {
          "category": "description",
          "text": "Issue summary: The AES-XTS cipher decryption implementation for 64 bit ARM\nplatform contains a bug that could cause it to read past the input buffer,\nleading to a crash.\n\nImpact summary: Applications that use the AES-XTS algorithm on the 64 bit ARM\nplatform can crash in rare circumstances. The AES-XTS algorithm is usually\nused for disk encryption.\n\nThe AES-XTS cipher decryption implementation for 64 bit ARM platform will read\npast the end of the ciphertext buffer if the ciphertext size is 4 mod 5 in 16\nbyte blocks, e.g. 144 bytes or 1024 bytes. If the memory after the ciphertext\nbuffer is unmapped, this will trigger a crash which results in a denial of\nservice.\n\nIf an attacker can control the size and location of the ciphertext buffer\nbeing decrypted by an application using AES-XTS on 64 bit ARM, the\napplication is affected. This is fairly unlikely making this issue\na Low severity one.",
          "title": "Vulnerability description"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        },
        {
          "category": "other",
          "text": "TuxCare has assessed that this vulnerability does not impact any currently supported TuxCare products. This evaluation may change as new information becomes available. For additional details regarding this vulnerability and affected products, refer to the provided references.",
          "title": "Statement"
        }
      ],
      "product_status": {
        "known_not_affected": [
          "Debian-11:alt-openssl-0:1.1.1w-3.1.amd64",
          "Debian-11:alt-openssl-0:1.1.1w-3.2.amd64",
          "Debian-11:alt-openssl-0:1.1.1w-3.4.amd64",
          "Debian-11:alt-openssl-dev-0:1.1.1w-3.1.amd64",
          "Debian-11:alt-openssl-dev-0:1.1.1w-3.2.amd64",
          "Debian-11:alt-openssl-dev-0:1.1.1w-3.4.amd64",
          "Debian-11:alt-openssl-doc-0:1.1.1w-3.1.all",
          "Debian-11:alt-openssl-doc-0:1.1.1w-3.2.all",
          "Debian-11:alt-openssl-doc-0:1.1.1w-3.4.all",
          "Debian-11:alt-openssl-libs-0:1.1.1w-3.1.amd64",
          "Debian-11:alt-openssl-libs-0:1.1.1w-3.2.amd64",
          "Debian-11:alt-openssl-libs-0:1.1.1w-3.4.amd64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els-lang/cve/CVE-2023-1255"
        },
        {
          "category": "external",
          "summary": "https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=02ac9c9420275868472f33b01def01218742b8bb",
          "url": "https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=02ac9c9420275868472f33b01def01218742b8bb"
        },
        {
          "category": "external",
          "summary": "https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=bc2f61ad70971869b242fc1cb445b98bad50074a",
          "url": "https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=bc2f61ad70971869b242fc1cb445b98bad50074a"
        },
        {
          "category": "external",
          "summary": "https://security.netapp.com/advisory/ntap-20230908-0006/",
          "url": "https://security.netapp.com/advisory/ntap-20230908-0006/"
        },
        {
          "category": "external",
          "summary": "https://www.openssl.org/news/secadv/20230419.txt",
          "url": "https://www.openssl.org/news/secadv/20230419.txt"
        }
      ],
      "release_date": "2023-04-20T17:15:00Z",
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
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          ]
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      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        },
        {
          "category": "impact",
          "date": "2026-06-12T13:13:11.934206Z",
          "details": "moderate",
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}