rhsa-2011_0999
Vulnerability from csaf_redhat
Published
2011-07-21 09:22
Modified
2024-11-22 04:16
Summary
Red Hat Security Advisory: rsync security, bug fix, and enhancement update

Notes

Topic
An updated rsync package that fixes one security issue, several bugs, and adds enhancements is now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having moderate 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
rsync is a program for synchronizing files over a network. A flaw was found in the way the rsync daemon handled the "filter", "exclude", and "exclude from" options, used for hiding files and preventing access to them from rsync clients. A remote attacker could use this flaw to bypass those restrictions by using certain command line options and symbolic links, allowing the attacker to overwrite those files if they knew their file names and had write access to them. (CVE-2007-6200) Note: This issue only affected users running rsync as a writable daemon: "read only" set to "false" in the rsync configuration file (for example, "/etc/rsyncd.conf"). By default, this option is set to "true". This update also fixes the following bugs: * The rsync package has been upgraded to upstream version 3.0.6, which provides a number of bug fixes and enhancements over the previous version. (BZ#339971) * When running an rsync daemon that was receiving files, a deferred info, error or log message could have been sent directly to the sender instead of being handled by the "rwrite()" function in the generator. Also, under certain circumstances, a deferred info or error message from the receiver could have bypassed the log file and could have been sent only to the client process. As a result, an "unexpected tag 3" fatal error could have been displayed. These problems have been fixed in this update so that an rsync daemon receiving files now works as expected. (BZ#471182) * Prior to this update, the rsync daemon called a number of timezone-using functions after doing a chroot. As a result, certain C libraries were unable to generate proper timestamps from inside a chrooted daemon. This bug has been fixed in this update so that the rsync daemon now calls the respective timezone-using functions prior to doing a chroot, and proper timestamps are now generated as expected. (BZ#575022) * When running rsync under a non-root user with the "-A" ("--acls") option and without using the "--numeric-ids" option, if there was an Access Control List (ACL) that included a group entry for a group that the respective user was not a member of on the receiving side, the "acl_set_file()" function returned an invalid argument value ("EINVAL"). This was caused by rsync mistakenly mapping the group name to the Group ID "GID_NONE" ("-1"), which failed. The bug has been fixed in this update so that no invalid argument is returned and rsync works as expected. (BZ#616093) * When creating a sparse file that was zero blocks long, the "rsync --sparse" command did not properly truncate the sparse file at the end of the copy transaction. As a result, the file size was bigger than expected. This bug has been fixed in this update by properly truncating the file so that rsync now copies such files as expected. (BZ#530866) * Under certain circumstances, when using rsync in daemon mode, rsync generator instances could have entered an infinitive loop, trying to write an error message for the receiver to an invalid socket. This problem has been fixed in this update by adding a new sibling message: when the receiver is reporting a socket-read error, the generator will notice this fact and avoid writing an error message down the socket, allowing it to close down gracefully when the pipe from the receiver closes. (BZ#690148) * Prior to this update, there were missing deallocations found in the "start_client()" function. This bug has been fixed in this update and no longer occurs. (BZ#700450) All users of rsync are advised to upgrade to this updated package, which resolves these issues and adds enhancements.
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 updated rsync package that fixes one security issue, several bugs, and\nadds enhancements is now available for Red Hat Enterprise Linux 5.\n\nThe Red Hat Security Response Team has rated this update as having moderate\nsecurity impact. A Common Vulnerability Scoring System (CVSS) base score,\nwhich gives a detailed severity rating, is available from the CVE link in\nthe References section.",
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        "text": "rsync is a program for synchronizing files over a network.\n\nA flaw was found in the way the rsync daemon handled the \"filter\",\n\"exclude\", and \"exclude from\" options, used for hiding files and preventing\naccess to them from rsync clients. A remote attacker could use this flaw to\nbypass those restrictions by using certain command line options and\nsymbolic links, allowing the attacker to overwrite those files if they knew\ntheir file names and had write access to them. (CVE-2007-6200)\n\nNote: This issue only affected users running rsync as a writable daemon:\n\"read only\" set to \"false\" in the rsync configuration file (for example,\n\"/etc/rsyncd.conf\"). By default, this option is set to \"true\".\n\nThis update also fixes the following bugs:\n\n* The rsync package has been upgraded to upstream version 3.0.6, which\nprovides a number of bug fixes and enhancements over the previous version.\n(BZ#339971)\n\n* When running an rsync daemon that was receiving files, a deferred info,\nerror or log message could have been sent directly to the sender instead of\nbeing handled by the \"rwrite()\" function in the generator. Also, under\ncertain circumstances, a deferred info or error message from the receiver\ncould have bypassed the log file and could have been sent only to the\nclient process. As a result, an \"unexpected tag 3\" fatal error could have\nbeen displayed. These problems have been fixed in this update so that an\nrsync daemon receiving files now works as expected. (BZ#471182)\n\n* Prior to this update, the rsync daemon called a number of timezone-using\nfunctions after doing a chroot. As a result, certain C libraries were\nunable to generate proper timestamps from inside a chrooted daemon. This\nbug has been fixed in this update so that the rsync daemon now calls the\nrespective timezone-using functions prior to doing a chroot, and proper\ntimestamps are now generated as expected. (BZ#575022)\n\n* When running rsync under a non-root user with the \"-A\" (\"--acls\") option\nand without using the \"--numeric-ids\" option, if there was an Access\nControl List (ACL) that included a group entry for a group that the\nrespective user was not a member of on the receiving side, the\n\"acl_set_file()\" function returned an invalid argument value (\"EINVAL\").\nThis was caused by rsync mistakenly mapping the group name to the Group ID\n\"GID_NONE\" (\"-1\"), which failed. The bug has been fixed in this update so\nthat no invalid argument is returned and rsync works as expected.\n(BZ#616093)\n\n* When creating a sparse file that was zero blocks long, the \"rsync\n--sparse\" command did not properly truncate the sparse file at the end of\nthe copy transaction. As a result, the file size was bigger than expected.\nThis bug has been fixed in this update by properly truncating the file so\nthat rsync now copies such files as expected. (BZ#530866)\n\n* Under certain circumstances, when using rsync in daemon mode, rsync\ngenerator instances could have entered an infinitive loop, trying to write\nan error message for the receiver to an invalid socket. This problem has\nbeen fixed in this update by adding a new sibling message: when the\nreceiver is reporting a socket-read error, the generator will notice this\nfact and avoid writing an error message down the socket, allowing it to\nclose down gracefully when the pipe from the receiver closes. (BZ#690148)\n\n* Prior to this update, there were missing deallocations found in the\n\"start_client()\" function. This bug has been fixed in this update and no\nlonger occurs. (BZ#700450)\n\nAll users of rsync are advised to upgrade to this updated package, which\nresolves these issues and adds enhancements.",
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        "product_reference": "rsync-0:3.0.6-4.el5.x86_64",
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      },
      {
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        },
        "product_reference": "rsync-debuginfo-0:3.0.6-4.el5.s390x",
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        "full_product_name": {
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        "product_reference": "rsync-debuginfo-0:3.0.6-4.el5.x86_64",
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    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2007-6200",
      "discovery_date": "2007-12-01T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "407171"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "Unspecified vulnerability in rsync before 3.0.0pre6, when running a writable rsync daemon, allows remote attackers to bypass exclude, exclude_from, and filter and read or write hidden files via (1) symlink, (2) partial-dir, (3) backup-dir, and unspecified (4) dest options.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "rsync excluded content access restrictions bypass via symlinks",
          "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": {
        "fixed": [
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          "5Client:rsync-0:3.0.6-4.el5.ia64",
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          "5Server:rsync-0:3.0.6-4.el5.i386",
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          "5Server:rsync-0:3.0.6-4.el5.s390x",
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          "5Server:rsync-debuginfo-0:3.0.6-4.el5.ia64",
          "5Server:rsync-debuginfo-0:3.0.6-4.el5.ppc",
          "5Server:rsync-debuginfo-0:3.0.6-4.el5.s390x",
          "5Server:rsync-debuginfo-0:3.0.6-4.el5.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2007-6200"
        },
        {
          "category": "external",
          "summary": "RHBZ#407171",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=407171"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2007-6200",
          "url": "https://www.cve.org/CVERecord?id=CVE-2007-6200"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2007-6200",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2007-6200"
        }
      ],
      "release_date": "2007-11-28T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2011-07-21T09:22:00+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\nuse the Red Hat Network to apply this update are available at\nhttps://access.redhat.com/kb/docs/DOC-11259",
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            "5Client:rsync-0:3.0.6-4.el5.s390x",
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          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2011:0999"
        }
      ],
      "scores": [
        {
          "cvss_v2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 4.3,
            "confidentialityImpact": "NONE",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
            "version": "2.0"
          },
          "products": [
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            "5Client:rsync-debuginfo-0:3.0.6-4.el5.ia64",
            "5Client:rsync-debuginfo-0:3.0.6-4.el5.ppc",
            "5Client:rsync-debuginfo-0:3.0.6-4.el5.s390x",
            "5Client:rsync-debuginfo-0:3.0.6-4.el5.x86_64",
            "5Server:rsync-0:3.0.6-4.el5.i386",
            "5Server:rsync-0:3.0.6-4.el5.ia64",
            "5Server:rsync-0:3.0.6-4.el5.ppc",
            "5Server:rsync-0:3.0.6-4.el5.s390x",
            "5Server:rsync-0:3.0.6-4.el5.src",
            "5Server:rsync-0:3.0.6-4.el5.x86_64",
            "5Server:rsync-debuginfo-0:3.0.6-4.el5.i386",
            "5Server:rsync-debuginfo-0:3.0.6-4.el5.ia64",
            "5Server:rsync-debuginfo-0:3.0.6-4.el5.ppc",
            "5Server:rsync-debuginfo-0:3.0.6-4.el5.s390x",
            "5Server:rsync-debuginfo-0:3.0.6-4.el5.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "rsync excluded content access restrictions bypass via symlinks"
    }
  ]
}


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