rhsa-2022_1591
Vulnerability from csaf_redhat
Published
2022-04-26 17:15
Modified
2024-11-06 00:44
Summary
Red Hat Security Advisory: zlib security update

Notes

Topic
An update for zlib is now available for Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details
The zlib packages provide a general-purpose lossless data compression library that is used by many different programs. Security Fix(es): * zlib: A flaw found in zlib v1.2.2.2 through zlib v1.2.11 when compressing (not decompressing!) certain inputs. (CVE-2018-25032) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use
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 Red Hat Inc. and provide a link to the original.


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  "vulnerabilities": [
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      "cve": "CVE-2018-25032",
      "cwe": {
        "id": "CWE-119",
        "name": "Improper Restriction of Operations within the Bounds of a Memory Buffer"
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      "discovery_date": "2022-03-24T00:00:00+00:00",
      "ids": [
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          "text": "2067945"
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      "notes": [
        {
          "category": "description",
          "text": "An out-of-bounds access flaw was found in zlib, which allows memory corruption when deflating (ex: when compressing) if the input has many distant matches. For some rare inputs with a large number of distant matches (crafted payloads), the buffer into which the compressed or deflated data is written can overwrite the distance symbol table which it overlays. This issue results in corrupted output due to invalid distances, which leads to out-of-bound access, corrupting the memory and potentially crashing the application.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "zlib: A flaw found in zlib when compressing (not decompressing) certain inputs",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This bug was introduced in zlib v1.2.2.2 through zlib v1.2.11, with the addition of the Z_FIXED option, which forces the use of fixed Huffman codes, rather than dynamic Huffman codes, allowing for a simpler decoder for special applications.\n\nThis bug is difficult to trigger, as Z_FIXED is usually only used in special circumstances.\n\nRsync does the compression in-transit using zlib. As rsync uses vulnerable zlib v1.2.8 package, which incorrectly handles memory when performing certain zlib compressing or deflating operations. This results in rsync to crash.\n\nNote - The issue wasn\u0027t publicly labelled as security vulnerability until 2022, but the fix was public since 2018.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
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        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2018-25032"
        },
        {
          "category": "external",
          "summary": "RHBZ#2067945",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2067945"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2018-25032",
          "url": "https://www.cve.org/CVERecord?id=CVE-2018-25032"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2018-25032",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-25032"
        }
      ],
      "release_date": "2018-04-20T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2022-04-26T17:15:11+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
          "product_ids": [
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            "BaseOS-8.1.0.Z.E4S:zlib-0:1.2.11-11.el8_1.1.src",
            "BaseOS-8.1.0.Z.E4S:zlib-0:1.2.11-11.el8_1.1.x86_64",
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            "BaseOS-8.1.0.Z.E4S:zlib-devel-0:1.2.11-11.el8_1.1.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2022:1591"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
            "version": "3.1"
          },
          "products": [
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          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "zlib: A flaw found in zlib when compressing (not decompressing) certain inputs"
    }
  ]
}


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