rhsa-2014_2025
Vulnerability from csaf_redhat
Published
2014-12-20 00:43
Modified
2024-11-22 08:48
Summary
Red Hat Security Advisory: ntp security update

Notes

Topic
Updated ntp packages that fix several security issues are now available for Red Hat Enterprise Linux 5. Red Hat Product Security has rated this update as having Important security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.
Details
The Network Time Protocol (NTP) is used to synchronize a computer's time with a referenced time source. Multiple buffer overflow flaws were discovered in ntpd's crypto_recv(), ctl_putdata(), and configure() functions. A remote attacker could use either of these flaws to send a specially crafted request packet that could crash ntpd or, potentially, execute arbitrary code with the privileges of the ntp user. Note: the crypto_recv() flaw requires non-default configurations to be active, while the ctl_putdata() flaw, by default, can only be exploited via local attackers, and the configure() flaw requires additional authentication to exploit. (CVE-2014-9295) It was found that ntpd automatically generated weak keys for its internal use if no ntpdc request authentication key was specified in the ntp.conf configuration file. A remote attacker able to match the configured IP restrictions could guess the generated key, and possibly use it to send ntpdc query or configuration requests. (CVE-2014-9293) It was found that ntp-keygen used a weak method for generating MD5 keys. This could possibly allow an attacker to guess generated MD5 keys that could then be used to spoof an NTP client or server. Note: it is recommended to regenerate any MD5 keys that had explicitly been generated with ntp-keygen; the default installation does not contain such keys). (CVE-2014-9294) 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": "Updated ntp packages that fix several security issues are now available for \nRed Hat Enterprise Linux 5.\n\nRed Hat Product Security has rated this update as having Important security\nimpact. A Common Vulnerability Scoring System (CVSS) base score, which\ngives a detailed severity rating, is available from the CVE link in the\nReferences section.",
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        "text": "The Network Time Protocol (NTP) is used to synchronize a computer\u0027s time\nwith a referenced time source.\n\nMultiple buffer overflow flaws were discovered in ntpd\u0027s crypto_recv(),\nctl_putdata(), and configure() functions. A remote attacker could use\neither of these flaws to send a specially crafted request packet that could\ncrash ntpd or, potentially, execute arbitrary code with the privileges of\nthe ntp user. Note: the crypto_recv() flaw requires non-default\nconfigurations to be active, while the ctl_putdata() flaw, by default, can\nonly be exploited via local attackers, and the configure() flaw requires\nadditional authentication to exploit. (CVE-2014-9295)\n\nIt was found that ntpd automatically generated weak keys for its internal\nuse if no ntpdc request authentication key was specified in the ntp.conf\nconfiguration file. A remote attacker able to match the configured IP\nrestrictions could guess the generated key, and possibly use it to send\nntpdc query or configuration requests. (CVE-2014-9293)\n\nIt was found that ntp-keygen used a weak method for generating MD5 keys.\nThis could possibly allow an attacker to guess generated MD5 keys that\ncould then be used to spoof an NTP client or server. Note: it is\nrecommended to regenerate any MD5 keys that had explicitly been generated\nwith ntp-keygen; the default installation does not contain such keys).\n(CVE-2014-9294)\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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          "details": "Moderate"
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      "title": "ntp: ntp-keygen uses weak random number generator and seed when generating MD5 keys"
    },
    {
      "cve": "CVE-2014-9295",
      "cwe": {
        "id": "CWE-119",
        "name": "Improper Restriction of Operations within the Bounds of a Memory Buffer"
      },
      "discovery_date": "2014-12-19T00:00:00+00:00",
      "ids": [
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          "system_name": "Red Hat Bugzilla ID",
          "text": "1176037"
        }
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          "category": "description",
          "text": "Multiple buffer overflow flaws were discovered in ntpd\u0027s crypto_recv(), ctl_putdata(), and configure() functions. A remote attacker could use either of these flaws to send a specially crafted request packet that could crash ntpd or, potentially, execute arbitrary code with the privileges of the ntp user. Note: the crypto_recv()  flaw requires non default configurations to be active, while the ctl_putdata() flaw, by default, can only be exploited via local attackers, and the configure() flaw requires additional authentication to exploit.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "ntp: Multiple buffer overflows via specially-crafted packets",
          "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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          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2014-9295"
        },
        {
          "category": "external",
          "summary": "RHBZ#1176037",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1176037"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2014-9295",
          "url": "https://www.cve.org/CVERecord?id=CVE-2014-9295"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2014-9295",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2014-9295"
        },
        {
          "category": "external",
          "summary": "http://support.ntp.org/bin/view/Main/SecurityNotice#Buffer_overflow_in_crypto_recv",
          "url": "http://support.ntp.org/bin/view/Main/SecurityNotice#Buffer_overflow_in_crypto_recv"
        },
        {
          "category": "external",
          "summary": "https://access.redhat.com/articles/1305723",
          "url": "https://access.redhat.com/articles/1305723"
        }
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      "release_date": "2014-12-19T00:00:00+00:00",
      "remediations": [
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          "date": "2014-12-20T00:43:37+00:00",
          "details": "Before applying this update, make sure all previously released errata \nrelevant to your system have been applied.\n\nThis update is available via the Red Hat Network. Details on how to use the \nRed Hat Network to apply this update are available at \nhttps://access.redhat.com/articles/11258",
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      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "ntp: Multiple buffer overflows via specially-crafted packets"
    }
  ]
}


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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.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.