RHSA-2014:1312
Vulnerability from csaf_redhat
Published
2014-09-26 21:28
Modified
2024-11-14 16:26
Summary
Red Hat Security Advisory: bash Shift_JIS security update

Notes

Topic
[Updated September 30, 2014] This advisory has been updated with information on restarting system services after applying this update. No changes have been made to the original packages. Updated bash Shift_JIS packages that fix one security issue are now available for Red Hat Enterprise Linux 5 and 6. 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 GNU Bourne Again shell (Bash) is a shell and command language interpreter compatible with the Bourne shell (sh). Bash is the default shell for Red Hat Enterprise Linux. Shift_JIS, also known as "SJIS", is a character encoding for the Japanese language. This package provides bash support for the Shift_JIS encoding. It was found that the fix for CVE-2014-6271 was incomplete, and Bash still allowed certain characters to be injected into other environments via specially crafted environment variables. An attacker could potentially use this flaw to override or bypass environment restrictions to execute shell commands. Certain services and applications allow remote unauthenticated attackers to provide environment variables, allowing them to exploit this issue. (CVE-2014-7169) Applications which directly create bash functions as environment variables need to be made aware of changes to the way names are handled by this update. Note that certain services, screen sessions, and tmux sessions may need to be restarted, and affected interactive users may need to re-login. Installing these updated packages without restarting services will address the vulnerability, but functionality may be impacted until affected services are restarted. For more information see the Knowledgebase article at https://access.redhat.com/articles/1200223 Note: Docker users are advised to use "yum update" within their containers, and to commit the resulting changes. For additional information on CVE-2014-6271 and CVE-2014-7169, refer to the aforementioned Knowledgebase article. All users who require Shift_JIS encoding support with Bash built-in functions are advised to upgrade to these updated packages, which contain a backported patch to correct this issue.
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 September 30, 2014]\nThis advisory has been updated with information on restarting system\nservices after applying this update. No changes have been made to the\noriginal packages.\n\nUpdated bash Shift_JIS packages that fix one security issue are now\navailable for Red Hat Enterprise Linux 5 and 6.\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 GNU Bourne Again shell (Bash) is a shell and command language\ninterpreter compatible with the Bourne shell (sh). Bash is the default\nshell for Red Hat Enterprise Linux.\n\nShift_JIS, also known as \"SJIS\", is a character encoding for the Japanese\nlanguage. This package provides bash support for the Shift_JIS encoding.\n\nIt was found that the fix for CVE-2014-6271 was incomplete, and Bash still\nallowed certain characters to be injected into other environments via\nspecially crafted environment variables. An attacker could potentially use\nthis flaw to override or bypass environment restrictions to execute shell\ncommands. Certain services and applications allow remote unauthenticated\nattackers to provide environment variables, allowing them to exploit this\nissue. (CVE-2014-7169)\n\nApplications which directly create bash functions as environment variables\nneed to be made aware of changes to the way names are handled by this\nupdate. Note that certain services, screen sessions, and tmux sessions may\nneed to be restarted, and affected interactive users may need to re-login.\nInstalling these updated packages without restarting services will address\nthe vulnerability, but functionality may be impacted until affected\nservices are restarted. For more information see the Knowledgebase article\nat https://access.redhat.com/articles/1200223\n\nNote: Docker users are advised to use \"yum update\" within their containers,\nand to commit the resulting changes.\n\nFor additional information on CVE-2014-6271 and CVE-2014-7169, refer to the\naforementioned Knowledgebase article.\n\nAll users who require Shift_JIS encoding support with Bash built-in\nfunctions are advised to upgrade to these updated packages, which contain a\nbackported patch to correct this issue.",
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                  integrityImpact: "PARTIAL",
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               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",
               product_ids: [
                  "5Server-SJIS-5.11.z:bash-0:3.2-33.el5_11.1.sjis.2.i386",
                  "5Server-SJIS-5.11.z:bash-0:3.2-33.el5_11.1.sjis.2.ia64",
                  "5Server-SJIS-5.11.z:bash-0:3.2-33.el5_11.1.sjis.2.src",
                  "5Server-SJIS-5.11.z:bash-0:3.2-33.el5_11.1.sjis.2.x86_64",
                  "5Server-SJIS-5.11.z:bash-debuginfo-0:3.2-33.el5_11.1.sjis.2.i386",
                  "5Server-SJIS-5.11.z:bash-debuginfo-0:3.2-33.el5_11.1.sjis.2.ia64",
                  "5Server-SJIS-5.11.z:bash-debuginfo-0:3.2-33.el5_11.1.sjis.2.x86_64",
                  "6Server-SJIS-6.5.Z:bash-0:4.1.2-15.el6_5.1.sjis.2.i686",
                  "6Server-SJIS-6.5.Z:bash-0:4.1.2-15.el6_5.1.sjis.2.src",
                  "6Server-SJIS-6.5.Z:bash-0:4.1.2-15.el6_5.1.sjis.2.x86_64",
                  "6Server-SJIS-6.5.Z:bash-debuginfo-0:4.1.2-15.el6_5.1.sjis.2.i686",
                  "6Server-SJIS-6.5.Z:bash-debuginfo-0:4.1.2-15.el6_5.1.sjis.2.x86_64",
                  "6Server-SJIS-6.5.Z:bash-doc-0:4.1.2-15.el6_5.1.sjis.2.i686",
                  "6Server-SJIS-6.5.Z:bash-doc-0:4.1.2-15.el6_5.1.sjis.2.x86_64",
               ],
               restart_required: {
                  category: "none",
               },
               url: "https://access.redhat.com/errata/RHSA-2014:1312",
            },
         ],
         scores: [
            {
               cvss_v2: {
                  accessComplexity: "LOW",
                  accessVector: "LOCAL",
                  authentication: "NONE",
                  availabilityImpact: "PARTIAL",
                  baseScore: 4.6,
                  confidentialityImpact: "PARTIAL",
                  integrityImpact: "PARTIAL",
                  vectorString: "AV:L/AC:L/Au:N/C:P/I:P/A:P",
                  version: "2.0",
               },
               products: [
                  "5Server-SJIS-5.11.z:bash-0:3.2-33.el5_11.1.sjis.2.i386",
                  "5Server-SJIS-5.11.z:bash-0:3.2-33.el5_11.1.sjis.2.ia64",
                  "5Server-SJIS-5.11.z:bash-0:3.2-33.el5_11.1.sjis.2.src",
                  "5Server-SJIS-5.11.z:bash-0:3.2-33.el5_11.1.sjis.2.x86_64",
                  "5Server-SJIS-5.11.z:bash-debuginfo-0:3.2-33.el5_11.1.sjis.2.i386",
                  "5Server-SJIS-5.11.z:bash-debuginfo-0:3.2-33.el5_11.1.sjis.2.ia64",
                  "5Server-SJIS-5.11.z:bash-debuginfo-0:3.2-33.el5_11.1.sjis.2.x86_64",
                  "6Server-SJIS-6.5.Z:bash-0:4.1.2-15.el6_5.1.sjis.2.i686",
                  "6Server-SJIS-6.5.Z:bash-0:4.1.2-15.el6_5.1.sjis.2.src",
                  "6Server-SJIS-6.5.Z:bash-0:4.1.2-15.el6_5.1.sjis.2.x86_64",
                  "6Server-SJIS-6.5.Z:bash-debuginfo-0:4.1.2-15.el6_5.1.sjis.2.i686",
                  "6Server-SJIS-6.5.Z:bash-debuginfo-0:4.1.2-15.el6_5.1.sjis.2.x86_64",
                  "6Server-SJIS-6.5.Z:bash-doc-0:4.1.2-15.el6_5.1.sjis.2.i686",
                  "6Server-SJIS-6.5.Z:bash-doc-0:4.1.2-15.el6_5.1.sjis.2.x86_64",
               ],
            },
         ],
         threats: [
            {
               category: "impact",
               details: "Moderate",
            },
         ],
         title: "bash: off-by-one error in deeply nested flow control constructs",
      },
   ],
}


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