rhsa-2008_0680
Vulnerability from csaf_redhat
Published
2008-07-24 16:38
Modified
2024-11-22 01:49
Summary
Red Hat Security Advisory: vsftpd security and bug fix update

Notes

Topic
An updated vsftpd package that fixes a security issue and various bugs is now available. This update has been rated as having moderate security impact by the Red Hat Security Response Team.
Details
vsftpd (Very Secure File Transfer Protocol (FTP) daemon) is a secure FTP server for Linux and Unix-like systems. The version of vsftpd as shipped in Red Hat Enterprise Linux 4 when used in combination with Pluggable Authentication Modules (PAM) had a memory leak on an invalid authentication attempt. Since vsftpd prior to version 2.0.5 allows any number of invalid attempts on the same connection this memory leak could lead to an eventual DoS. (CVE-2008-2375) This update mitigates this security issue by including a backported patch which terminates a session after a given number of failed log in attempts. The default number of attempts is 3 and this can be configured using the "max_login_fails" directive. This package also addresses the following bugs: * when uploading unique files, a bug in vsftpd caused the file to be saved with a suffix '.1' even when no previous file with that name existed. This issues is resolved in this package. * when vsftpd was run through the init script, it was possible for the init script to print an 'OK' message, even though the vsftpd may not have started. The init script no longer produces a false verification with this update. * vsftpd only supported usernames with a maximum length of 32 characters. The updated package now supports usernames up to 128 characters long. * a system flaw meant vsftpd output could become dependent on the timing or sequence of other events, even when the "lock_upload_files" option was set. If a file, filename.ext, was being uploaded and a second transfer of the file, filename.ext, was started before the first transfer was finished, the resultant uploaded file was a corrupt concatenation of the latter upload and the tail of the earlier upload. With this updated package, vsftpd allows the earlier upload to complete before overwriting with the latter upload, fixing the issue. * the 'lock_upload_files' option was not documented in the manual page. A new manual page describing this option is included in this package. * vsftpd did not support usernames that started with an underscore or a period character. These special characters are now allowed at the beginning of a username. * when storing a unique file, vsftpd could cause an error for some clients. This is rectified in this package. * vsftpd init script was found to not be Linux Standards Base compliant. This update corrects their exit codes to conform to the standard. All vsftpd users are advised to upgrade to this updated package, which resolves these issues.
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": "vsftpd (Very Secure File Transfer Protocol (FTP) daemon) is a secure FTP\nserver for Linux and Unix-like systems.\n\nThe version of vsftpd as shipped in Red Hat Enterprise Linux 4 when used in\ncombination with Pluggable Authentication Modules (PAM) had a memory leak\non an invalid authentication attempt. Since vsftpd prior to version 2.0.5\nallows any number of invalid attempts on the same connection this memory\nleak could lead to an eventual DoS. (CVE-2008-2375)\n\nThis update mitigates this security issue by including a backported patch\nwhich terminates a session after a given number of failed log in attempts.\nThe default number of attempts is 3 and this can be configured using the\n\"max_login_fails\" directive.\n\nThis package also addresses the following bugs:\n\n* when uploading unique files, a bug in vsftpd caused the file to be saved\nwith a suffix \u0027.1\u0027 even when no previous file with that name existed. This\nissues is resolved in this package.\n\n* when vsftpd was run through the init script, it was possible for the init\nscript to print an \u0027OK\u0027 message, even though the vsftpd may not have\nstarted. The init script no longer produces a false verification with this\nupdate.\n\n* vsftpd only supported usernames with a maximum length of 32 characters.\nThe updated package now supports usernames up to 128 characters long.\n\n* a system flaw meant vsftpd output could become dependent on the timing or\nsequence of other events, even when the \"lock_upload_files\" option was set.\nIf a file, filename.ext, was being uploaded and a second transfer of the\nfile, filename.ext, was started before the first transfer was finished, the\nresultant uploaded file was a corrupt concatenation of the latter upload\nand the tail of the earlier upload. With this updated package, vsftpd\nallows the earlier upload to complete before overwriting with the latter\nupload, fixing the issue.\n\n* the \u0027lock_upload_files\u0027 option was not documented in the manual page. A\nnew manual page describing this option is included in this package.\n\n* vsftpd did not support usernames that started with an underscore or a\nperiod character. These special characters are now allowed at the beginning\nof a username.\n\n* when storing a unique file, vsftpd could cause an error for some clients.\nThis is rectified in this package.\n\n* vsftpd init script was found to not be Linux Standards Base compliant.\nThis update corrects their exit codes to conform to the standard.\n\nAll vsftpd users are advised to upgrade to this updated package, which\nresolves these issues.",
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    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2008-2375",
      "cwe": {
        "id": "CWE-401",
        "name": "Missing Release of Memory after Effective Lifetime"
      },
      "discovery_date": "2006-06-28T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "453376"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "Memory leak in a certain Red Hat deployment of vsftpd before 2.0.5 on Red Hat Enterprise Linux (RHEL) 3 and 4, when PAM is used, allows remote attackers to cause a denial of service (memory consumption) via a large number of invalid authentication attempts within the same session, a different vulnerability than CVE-2007-5962.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "older vsftpd authentication memory leak",
          "title": "Vulnerability summary"
        }
      ],
      "product_status": {
        "fixed": [
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          "4AS:vsftpd-0:2.0.1-6.el4.s390",
          "4AS:vsftpd-0:2.0.1-6.el4.s390x",
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          "4ES:vsftpd-debuginfo-0:2.0.1-6.el4.s390",
          "4ES:vsftpd-debuginfo-0:2.0.1-6.el4.s390x",
          "4ES:vsftpd-debuginfo-0:2.0.1-6.el4.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2008-2375"
        },
        {
          "category": "external",
          "summary": "RHBZ#453376",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=453376"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2008-2375",
          "url": "https://www.cve.org/CVERecord?id=CVE-2008-2375"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2008-2375",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2008-2375"
        }
      ],
      "release_date": "2006-06-28T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2008-07-24T16:38:00+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/FAQ_58_10188",
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            "4ES:vsftpd-0:2.0.1-6.el4.i386",
            "4ES:vsftpd-0:2.0.1-6.el4.ia64",
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            "4ES:vsftpd-debuginfo-0:2.0.1-6.el4.ppc",
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            "4ES:vsftpd-debuginfo-0:2.0.1-6.el4.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2008:0680"
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "older vsftpd authentication memory leak"
    }
  ]
}


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