rhsa-2015:0113
Vulnerability from csaf_redhat
Published
2015-02-02 19:13
Modified
2024-11-22 08:39
Summary
Red Hat Security Advisory: libvncserver security update

Notes

Topic
Updated libvncserver packages that fix two security issues are now available for Red Hat Enterprise Linux 6.5 Extended Update Support. Red Hat Product Security has rated this update as having Moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.
Details
LibVNCServer is a library that allows for easy creation of VNC server or client functionality. An integer overflow flaw, leading to a heap-based buffer overflow, was found in the way screen sizes were handled by LibVNCServer. A malicious VNC server could use this flaw to cause a client to crash or, potentially, execute arbitrary code in the client. (CVE-2014-6051) Two stack-based buffer overflow flaws were found in the way LibVNCServer handled file transfers. A remote attacker could use this flaw to crash the VNC server using a malicious VNC client. (CVE-2014-6055) Red Hat would like to thank oCERT for reporting these issues. oCERT acknowledges Nicolas Ruff as the original reporter. All libvncserver users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. All running applications linked against libvncserver must be restarted for this update to take effect.
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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          "text": "An integer overflow flaw, leading to a heap-based buffer overflow, was found in the way screen sizes were handled by LibVNCServer. A malicious VNC server could use this flaw to cause a client to crash or, potentially, execute arbitrary code in the client.",
          "title": "Vulnerability description"
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          "text": "libvncserver: integer overflow flaw, leading to a heap-based buffer overflow in screen size handling",
          "title": "Vulnerability summary"
        },
        {
          "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.",
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          "details": "Moderate"
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      "title": "libvncserver: integer overflow flaw, leading to a heap-based buffer overflow in screen size handling"
    },
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        {
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          ]
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        "name": "Stack-based Buffer Overflow"
      },
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      "ids": [
        {
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          "text": "1144293"
        }
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      "notes": [
        {
          "category": "description",
          "text": "Two stack-based buffer overflow flaws were found in the way LibVNCServer handled file transfers. A remote attacker could use this flaw to crash the VNC server using a malicious VNC client.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "libvncserver: server stacked-based buffer overflow flaws in file transfer handling",
          "title": "Vulnerability summary"
        },
        {
          "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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          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "libvncserver: server stacked-based buffer overflow flaws in file transfer handling"
    }
  ]
}


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