rhsa-2020_3803
Vulnerability from csaf_redhat
Published
2020-09-22 11:42
Modified
2024-11-22 13:41
Summary
Red Hat Security Advisory: bash security update
Notes
Topic
An update for bash is now available for Red Hat Enterprise Linux 7.4 Advanced Update Support, Red Hat Enterprise Linux 7.4 Telco Extended Update Support, and Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions.
Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details
The bash packages provide Bash (Bourne-again shell), which is the default shell for Red Hat Enterprise Linux.
Security Fix(es):
* bash: BASH_CMD is writable in restricted bash shells (CVE-2019-9924)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
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.
{ "document": { "aggregate_severity": { "namespace": "https://access.redhat.com/security/updates/classification/", "text": "Moderate" }, "category": "csaf_security_advisory", "csaf_version": "2.0", "distribution": { "text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "summary", "text": "An update for bash is now available for Red Hat Enterprise Linux 7.4 Advanced Update Support, Red Hat Enterprise Linux 7.4 Telco Extended Update Support, and Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions.\n\nRed Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.", "title": "Topic" }, { "category": "general", "text": "The bash packages provide Bash (Bourne-again shell), which is the default shell for Red Hat Enterprise Linux.\n\nSecurity Fix(es):\n\n* bash: BASH_CMD is writable in restricted bash shells (CVE-2019-9924)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.", "title": "Details" }, { "category": "legal_disclaimer", "text": "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.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://access.redhat.com/security/team/contact/", "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.", "name": "Red Hat Product Security", "namespace": "https://www.redhat.com" }, "references": [ { "category": "self", "summary": "https://access.redhat.com/errata/RHSA-2020:3803", "url": "https://access.redhat.com/errata/RHSA-2020:3803" }, { "category": "external", "summary": "https://access.redhat.com/security/updates/classification/#moderate", "url": "https://access.redhat.com/security/updates/classification/#moderate" }, { "category": "external", "summary": "1691774", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1691774" }, { "category": "self", "summary": "Canonical URL", 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7.4)", "product_id": "7Server-optional-7.4.TUS:bash-0:4.2.46-30.el7_4.x86_64" }, "product_reference": "bash-0:4.2.46-30.el7_4.x86_64", "relates_to_product_reference": "7Server-optional-7.4.TUS" }, { "category": "default_component_of", "full_product_name": { "name": "bash-debuginfo-0:4.2.46-30.el7_4.x86_64 as a component of Red Hat Enterprise Linux Server Optional TUS (v. 7.4)", "product_id": "7Server-optional-7.4.TUS:bash-debuginfo-0:4.2.46-30.el7_4.x86_64" }, "product_reference": "bash-debuginfo-0:4.2.46-30.el7_4.x86_64", "relates_to_product_reference": "7Server-optional-7.4.TUS" }, { "category": "default_component_of", "full_product_name": { "name": "bash-doc-0:4.2.46-30.el7_4.x86_64 as a component of Red Hat Enterprise Linux Server Optional TUS (v. 7.4)", "product_id": "7Server-optional-7.4.TUS:bash-doc-0:4.2.46-30.el7_4.x86_64" }, "product_reference": "bash-doc-0:4.2.46-30.el7_4.x86_64", "relates_to_product_reference": "7Server-optional-7.4.TUS" } ] }, "vulnerabilities": [ { "cve": "CVE-2019-9924", "cwe": { "id": "CWE-138", "name": "Improper Neutralization of Special Elements" }, "discovery_date": "2019-03-22T00:00:00+00:00", "ids": [ { "system_name": "Red Hat Bugzilla ID", "text": "1691774" } ], "notes": [ { "category": "description", "text": "rbash in Bash before 4.4-beta2 did not prevent the shell user from modifying BASH_CMDS, thus allowing the user to execute any command with the permissions of the shell.", "title": "Vulnerability description" }, { "category": "summary", "text": "bash: BASH_CMD is writable in restricted bash shells", "title": "Vulnerability summary" }, { "category": "other", "text": "Impact of the flaw set to Moderate as restricted shell shall not be used as a security feature alone, as it is very hard to configure it properly and several bypasses exist for it.\n\nThis issue did not affect the versions of bash as shipped with Red Hat Enterprise Linux 5 as they did not include support for BASH_CMDS environment variable.\n\nRed Hat Virtualization Hypervisor and Management Appliance were affected by this issue, but do not use the restricted bash shell in a way that would be exposed to attackers. Future updates may address this issue.", "title": "Statement" }, { "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": [ "7Server-7.4.AUS:bash-0:4.2.46-30.el7_4.src", "7Server-7.4.AUS:bash-0:4.2.46-30.el7_4.x86_64", "7Server-7.4.AUS:bash-debuginfo-0:4.2.46-30.el7_4.x86_64", "7Server-7.4.AUS:bash-doc-0:4.2.46-30.el7_4.x86_64", "7Server-7.4.E4S:bash-0:4.2.46-30.el7_4.ppc64le", "7Server-7.4.E4S:bash-0:4.2.46-30.el7_4.src", "7Server-7.4.E4S:bash-0:4.2.46-30.el7_4.x86_64", "7Server-7.4.E4S:bash-debuginfo-0:4.2.46-30.el7_4.ppc64le", "7Server-7.4.E4S:bash-debuginfo-0:4.2.46-30.el7_4.x86_64", "7Server-7.4.E4S:bash-doc-0:4.2.46-30.el7_4.ppc64le", "7Server-7.4.E4S:bash-doc-0:4.2.46-30.el7_4.x86_64", "7Server-7.4.TUS:bash-0:4.2.46-30.el7_4.src", "7Server-7.4.TUS:bash-0:4.2.46-30.el7_4.x86_64", "7Server-7.4.TUS:bash-debuginfo-0:4.2.46-30.el7_4.x86_64", "7Server-7.4.TUS:bash-doc-0:4.2.46-30.el7_4.x86_64", "7Server-optional-7.4.AUS:bash-0:4.2.46-30.el7_4.src", "7Server-optional-7.4.AUS:bash-0:4.2.46-30.el7_4.x86_64", "7Server-optional-7.4.AUS:bash-debuginfo-0:4.2.46-30.el7_4.x86_64", "7Server-optional-7.4.AUS:bash-doc-0:4.2.46-30.el7_4.x86_64", "7Server-optional-7.4.E4S:bash-0:4.2.46-30.el7_4.ppc64le", "7Server-optional-7.4.E4S:bash-0:4.2.46-30.el7_4.src", "7Server-optional-7.4.E4S:bash-0:4.2.46-30.el7_4.x86_64", "7Server-optional-7.4.E4S:bash-debuginfo-0:4.2.46-30.el7_4.ppc64le", "7Server-optional-7.4.E4S:bash-debuginfo-0:4.2.46-30.el7_4.x86_64", "7Server-optional-7.4.E4S:bash-doc-0:4.2.46-30.el7_4.ppc64le", "7Server-optional-7.4.E4S:bash-doc-0:4.2.46-30.el7_4.x86_64", "7Server-optional-7.4.TUS:bash-0:4.2.46-30.el7_4.src", "7Server-optional-7.4.TUS:bash-0:4.2.46-30.el7_4.x86_64", "7Server-optional-7.4.TUS:bash-debuginfo-0:4.2.46-30.el7_4.x86_64", "7Server-optional-7.4.TUS:bash-doc-0:4.2.46-30.el7_4.x86_64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://access.redhat.com/security/cve/CVE-2019-9924" }, { "category": "external", "summary": "RHBZ#1691774", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1691774" }, { "category": "external", "summary": "https://www.cve.org/CVERecord?id=CVE-2019-9924", "url": "https://www.cve.org/CVERecord?id=CVE-2019-9924" }, { "category": "external", "summary": "https://nvd.nist.gov/vuln/detail/CVE-2019-9924", "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-9924" } ], "release_date": "2019-03-07T00:00:00+00:00", "remediations": [ { "category": "vendor_fix", "date": "2020-09-22T11:42:55+00:00", "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258", "product_ids": [ 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"7Server-optional-7.4.AUS:bash-doc-0:4.2.46-30.el7_4.x86_64", "7Server-optional-7.4.E4S:bash-0:4.2.46-30.el7_4.ppc64le", "7Server-optional-7.4.E4S:bash-0:4.2.46-30.el7_4.src", "7Server-optional-7.4.E4S:bash-0:4.2.46-30.el7_4.x86_64", "7Server-optional-7.4.E4S:bash-debuginfo-0:4.2.46-30.el7_4.ppc64le", "7Server-optional-7.4.E4S:bash-debuginfo-0:4.2.46-30.el7_4.x86_64", "7Server-optional-7.4.E4S:bash-doc-0:4.2.46-30.el7_4.ppc64le", "7Server-optional-7.4.E4S:bash-doc-0:4.2.46-30.el7_4.x86_64", "7Server-optional-7.4.TUS:bash-0:4.2.46-30.el7_4.src", "7Server-optional-7.4.TUS:bash-0:4.2.46-30.el7_4.x86_64", "7Server-optional-7.4.TUS:bash-debuginfo-0:4.2.46-30.el7_4.x86_64", "7Server-optional-7.4.TUS:bash-doc-0:4.2.46-30.el7_4.x86_64" ], "restart_required": { "category": "none" }, "url": "https://access.redhat.com/errata/RHSA-2020:3803" } ], "scores": [ { "cvss_v3": { "attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" }, "products": [ "7Server-7.4.AUS:bash-0:4.2.46-30.el7_4.src", "7Server-7.4.AUS:bash-0:4.2.46-30.el7_4.x86_64", "7Server-7.4.AUS:bash-debuginfo-0:4.2.46-30.el7_4.x86_64", "7Server-7.4.AUS:bash-doc-0:4.2.46-30.el7_4.x86_64", "7Server-7.4.E4S:bash-0:4.2.46-30.el7_4.ppc64le", "7Server-7.4.E4S:bash-0:4.2.46-30.el7_4.src", "7Server-7.4.E4S:bash-0:4.2.46-30.el7_4.x86_64", "7Server-7.4.E4S:bash-debuginfo-0:4.2.46-30.el7_4.ppc64le", "7Server-7.4.E4S:bash-debuginfo-0:4.2.46-30.el7_4.x86_64", "7Server-7.4.E4S:bash-doc-0:4.2.46-30.el7_4.ppc64le", "7Server-7.4.E4S:bash-doc-0:4.2.46-30.el7_4.x86_64", "7Server-7.4.TUS:bash-0:4.2.46-30.el7_4.src", "7Server-7.4.TUS:bash-0:4.2.46-30.el7_4.x86_64", "7Server-7.4.TUS:bash-debuginfo-0:4.2.46-30.el7_4.x86_64", "7Server-7.4.TUS:bash-doc-0:4.2.46-30.el7_4.x86_64", "7Server-optional-7.4.AUS:bash-0:4.2.46-30.el7_4.src", "7Server-optional-7.4.AUS:bash-0:4.2.46-30.el7_4.x86_64", "7Server-optional-7.4.AUS:bash-debuginfo-0:4.2.46-30.el7_4.x86_64", "7Server-optional-7.4.AUS:bash-doc-0:4.2.46-30.el7_4.x86_64", "7Server-optional-7.4.E4S:bash-0:4.2.46-30.el7_4.ppc64le", "7Server-optional-7.4.E4S:bash-0:4.2.46-30.el7_4.src", "7Server-optional-7.4.E4S:bash-0:4.2.46-30.el7_4.x86_64", "7Server-optional-7.4.E4S:bash-debuginfo-0:4.2.46-30.el7_4.ppc64le", "7Server-optional-7.4.E4S:bash-debuginfo-0:4.2.46-30.el7_4.x86_64", "7Server-optional-7.4.E4S:bash-doc-0:4.2.46-30.el7_4.ppc64le", "7Server-optional-7.4.E4S:bash-doc-0:4.2.46-30.el7_4.x86_64", "7Server-optional-7.4.TUS:bash-0:4.2.46-30.el7_4.src", "7Server-optional-7.4.TUS:bash-0:4.2.46-30.el7_4.x86_64", "7Server-optional-7.4.TUS:bash-debuginfo-0:4.2.46-30.el7_4.x86_64", "7Server-optional-7.4.TUS:bash-doc-0:4.2.46-30.el7_4.x86_64" ] } ], "threats": [ { "category": "impact", "details": "Moderate" } ], "title": "bash: BASH_CMD is writable in restricted bash shells" } ] }
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Sightings
Author | Source | Type | Date |
---|
Nomenclature
- 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.