rhsa-2009_1651
Vulnerability from csaf_redhat
Published
2009-12-08 19:42
Modified
2024-11-22 03:08
Summary
Red Hat Security Advisory: ntp security update

Notes

Topic
An updated ntp package that fixes two security issues is now available for Red Hat Enterprise Linux 3. This update has been rated as having moderate security impact by the Red Hat Security Response Team.
Details
The Network Time Protocol (NTP) is used to synchronize a computer's time with a referenced time source. Robin Park and Dmitri Vinokurov discovered a flaw in the way ntpd handled certain malformed NTP packets. ntpd logged information about all such packets and replied with an NTP packet that was treated as malformed when received by another ntpd. A remote attacker could use this flaw to create an NTP packet reply loop between two ntpd servers via a malformed packet with a spoofed source IP address and port, causing ntpd on those servers to use excessive amounts of CPU time and fill disk space with log messages. (CVE-2009-3563) A buffer overflow flaw was found in the ntpq diagnostic command. A malicious, remote server could send a specially-crafted reply to an ntpq request that could crash ntpq or, potentially, execute arbitrary code with the privileges of the user running the ntpq command. (CVE-2009-0159) All ntp users are advised to upgrade to this updated package, which contains backported patches to resolve these issues. After installing the update, the ntpd daemon will restart automatically.
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": "The Network Time Protocol (NTP) is used to synchronize a computer\u0027s time\nwith a referenced time source.\n\nRobin Park and Dmitri Vinokurov discovered a flaw in the way ntpd handled\ncertain malformed NTP packets. ntpd logged information about all such\npackets and replied with an NTP packet that was treated as malformed when\nreceived by another ntpd. A remote attacker could use this flaw to create\nan NTP packet reply loop between two ntpd servers via a malformed packet\nwith a spoofed source IP address and port, causing ntpd on those servers to\nuse excessive amounts of CPU time and fill disk space with log messages.\n(CVE-2009-3563)\n\nA buffer overflow flaw was found in the ntpq diagnostic command. A\nmalicious, remote server could send a specially-crafted reply to an ntpq\nrequest that could crash ntpq or, potentially, execute arbitrary code with\nthe privileges of the user running the ntpq command. (CVE-2009-0159)\n\nAll ntp users are advised to upgrade to this updated package, which\ncontains backported patches to resolve these issues. After installing the\nupdate, the ntpd daemon will restart automatically.",
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          "text": "Stack-based buffer overflow in the cookedprint function in ntpq/ntpq.c in ntpq in NTP before 4.2.4p7-RC2 allows remote NTP servers to execute arbitrary code via a crafted response.",
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          "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": "Low"
        }
      ],
      "title": "ntp: buffer overflow in ntpq"
    },
    {
      "cve": "CVE-2009-3563",
      "discovery_date": "2009-10-27T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "531213"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "ntp_request.c in ntpd in NTP before 4.2.4p8, and 4.2.5, allows remote attackers to cause a denial of service (CPU and bandwidth consumption) by using MODE_PRIVATE to send a spoofed (1) request or (2) response packet that triggers a continuous exchange of MODE_PRIVATE error responses between two NTP daemons.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "ntpd: DoS with mode 7 packets (VU#568372)",
          "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"
        }
      ],
      "product_status": {
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          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2009-3563"
        },
        {
          "category": "external",
          "summary": "RHBZ#531213",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=531213"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2009-3563",
          "url": "https://www.cve.org/CVERecord?id=CVE-2009-3563"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2009-3563",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2009-3563"
        }
      ],
      "release_date": "2009-12-08T00:00:00+00:00",
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          "category": "vendor_fix",
          "date": "2009-12-08T19:42:00+00:00",
          "details": "Before applying this update, make sure that all previously-released\nerrata relevant to your system have been applied.\n\nThis update is available via Red Hat Network.  Details on how to use\nthe Red Hat Network to apply this update are available at\nhttp://kbase.redhat.com/faq/docs/DOC-11259",
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        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "ntpd: DoS with mode 7 packets (VU#568372)"
    }
  ]
}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
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  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.