rhsa-2020_3735
Vulnerability from csaf_redhat
Published
2020-09-14 12:44
Modified
2024-11-22 15:37
Summary
Red Hat Security Advisory: dovecot security update

Notes

Topic
An update for dovecot is now available for Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important. 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
Dovecot is an IMAP server for Linux and other UNIX-like systems, written primarily with security in mind. It also contains a small POP3 server, and supports e-mail in either the maildir or mbox format. The SQL drivers and authentication plug-ins are provided as subpackages. Security Fix(es): * dovecot: Resource exhaustion via deeply nested MIME parts (CVE-2020-12100) * dovecot: Out of bound reads in dovecot NTLM implementation (CVE-2020-12673) * dovecot: Crash due to assert in RPA implementation (CVE-2020-12674) 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.


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            {
               category: "description",
               text: "A flaw was found in dovecot. A remote attacker could cause a denial of service by repeatedly sending emails containing MIME parts containing malicious content of which dovecot will attempt to parse. The highest threat from this vulnerability is to system availability.",
               title: "Vulnerability description",
            },
            {
               category: "summary",
               text: "dovecot: Resource exhaustion via deeply nested MIME parts",
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            },
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               category: "general",
               text: "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
               title: "CVSS score applicability",
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                  privilegesRequired: "NONE",
                  scope: "UNCHANGED",
                  userInteraction: "NONE",
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               url: "https://access.redhat.com/errata/RHSA-2020:3735",
            },
            {
               category: "workaround",
               details: "Upstream suggests that this flaw can be mitigated by disabling NTLM authentication. NTLM authentication can be disabled by using the configuration parameter \"auth_mechanisms\". More details available at: https://doc.dovecot.org/configuration_manual/authentication/authentication_mechanisms/",
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         scores: [
            {
               cvss_v3: {
                  attackComplexity: "LOW",
                  attackVector: "NETWORK",
                  availabilityImpact: "HIGH",
                  baseScore: 7.5,
                  baseSeverity: "HIGH",
                  confidentialityImpact: "NONE",
                  integrityImpact: "NONE",
                  privilegesRequired: "NONE",
                  scope: "UNCHANGED",
                  userInteraction: "NONE",
                  vectorString: "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  version: "3.1",
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               ],
            },
         ],
         threats: [
            {
               category: "impact",
               details: "Important",
            },
         ],
         title: "dovecot: Out of bound reads in dovecot NTLM implementation",
      },
      {
         acknowledgments: [
            {
               names: [
                  "the Dovecot project",
               ],
            },
         ],
         cve: "CVE-2020-12674",
         cwe: {
            id: "CWE-125",
            name: "Out-of-bounds Read",
         },
         discovery_date: "2020-08-05T00:00:00+00:00",
         ids: [
            {
               system_name: "Red Hat Bugzilla ID",
               text: "1866317",
            },
         ],
         notes: [
            {
               category: "description",
               text: "A flaw was found in dovecot. An attacker can use the way dovecot handles RPA (Remote Passphrase Authentication) to crash the authentication process repeatedly preventing login. The highest threat from this vulnerability is to system availability.",
               title: "Vulnerability description",
            },
            {
               category: "summary",
               text: "dovecot: Crash due to assert in RPA implementation",
               title: "Vulnerability summary",
            },
            {
               category: "general",
               text: "The CVSS score(s) listed for this vulnerability do not reflect the associated product's 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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         },
         references: [
            {
               category: "self",
               summary: "Canonical URL",
               url: "https://access.redhat.com/security/cve/CVE-2020-12674",
            },
            {
               category: "external",
               summary: "RHBZ#1866317",
               url: "https://bugzilla.redhat.com/show_bug.cgi?id=1866317",
            },
            {
               category: "external",
               summary: "https://www.cve.org/CVERecord?id=CVE-2020-12674",
               url: "https://www.cve.org/CVERecord?id=CVE-2020-12674",
            },
            {
               category: "external",
               summary: "https://nvd.nist.gov/vuln/detail/CVE-2020-12674",
               url: "https://nvd.nist.gov/vuln/detail/CVE-2020-12674",
            },
            {
               category: "external",
               summary: "https://dovecot.org/pipermail/dovecot-news/2020-August/000443.html",
               url: "https://dovecot.org/pipermail/dovecot-news/2020-August/000443.html",
            },
         ],
         release_date: "2020-08-12T12:00:00+00:00",
         remediations: [
            {
               category: "vendor_fix",
               date: "2020-09-14T12:44:35+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",
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               ],
               restart_required: {
                  category: "none",
               },
               url: "https://access.redhat.com/errata/RHSA-2020:3735",
            },
            {
               category: "workaround",
               details: "Upstream suggests that this flaw can be mitigated by disabling RPA (Remote Passphrase Authentication). RPA can be disabled by using the configuration parameter \"auth_mechanisms\". More details available at: https://doc.dovecot.org/configuration_manual/authentication/authentication_mechanisms/",
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         scores: [
            {
               cvss_v3: {
                  attackComplexity: "LOW",
                  attackVector: "NETWORK",
                  availabilityImpact: "HIGH",
                  baseScore: 7.5,
                  baseSeverity: "HIGH",
                  confidentialityImpact: "NONE",
                  integrityImpact: "NONE",
                  privilegesRequired: "NONE",
                  scope: "UNCHANGED",
                  userInteraction: "NONE",
                  vectorString: "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  version: "3.1",
               },
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                  "AppStream-8.0.0.Z.E4S:dovecot-mysql-debuginfo-1:2.2.36-5.el8_0.3.ppc64le",
                  "AppStream-8.0.0.Z.E4S:dovecot-mysql-debuginfo-1:2.2.36-5.el8_0.3.x86_64",
                  "AppStream-8.0.0.Z.E4S:dovecot-pgsql-1:2.2.36-5.el8_0.3.ppc64le",
                  "AppStream-8.0.0.Z.E4S:dovecot-pgsql-1:2.2.36-5.el8_0.3.x86_64",
                  "AppStream-8.0.0.Z.E4S:dovecot-pgsql-debuginfo-1:2.2.36-5.el8_0.3.ppc64le",
                  "AppStream-8.0.0.Z.E4S:dovecot-pgsql-debuginfo-1:2.2.36-5.el8_0.3.x86_64",
                  "AppStream-8.0.0.Z.E4S:dovecot-pigeonhole-debuginfo-1:2.2.36-5.el8_0.3.ppc64le",
                  "AppStream-8.0.0.Z.E4S:dovecot-pigeonhole-debuginfo-1:2.2.36-5.el8_0.3.x86_64",
               ],
            },
         ],
         threats: [
            {
               category: "impact",
               details: "Important",
            },
         ],
         title: "dovecot: Crash due to assert in RPA implementation",
      },
   ],
}


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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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