{ "document": { "aggregate_severity": { "text": "Medium" }, "category": "csaf_vex", "csaf_version": "2.0", "distribution": { "text": "TuxCare License Agreement", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "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 Cloud Linux Inc. and provide a link to the original.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://tuxcare.com/contact/", "name": "TuxCare", "namespace": "https://tuxcare.com/" }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://security.tuxcare.com/csaf/v2/els_os/centos8.5els/vex/2020/cve-2020-10958-els_os-centos8_5els.json" } ], "tracking": { "current_release_date": "2026-04-20T16:45:49Z", "generator": { "date": "2026-04-20T16:45:49Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2020-10958-ELS_OS-CENTOS8.5ELS", "initial_release_date": "2020-05-18T14:15:00Z", "revision_history": [ { "date": "2020-05-18T14:15:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-04-10T19:36:01Z", "number": "2", "summary": "Official Publication" }, { "date": "2026-04-20T16:45:49Z", "number": "3", "summary": "Update document" } ], "status": "final", "version": "3" }, "title": "Security update on CVE-2020-10958" }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Community Enterprise Operating System 8.5", "product": { "name": "Community Enterprise Operating System 8.5", "product_id": "CentOS-8.5", "product_identification_helper": { "cpe": "cpe:2.3:o:centos:centos:8.5:*:*:*:*:*:*:*" } } } ], "category": "product_family", "name": "Community Enterprise Operating System" }, { "branches": [ { "category": "product_version", "name": "dovecot-pigeonhole-1:2.3.8-9.el8.x86_64", "product": { "name": "dovecot-pigeonhole-1:2.3.8-9.el8.x86_64", "product_id": "dovecot-pigeonhole-1:2.3.8-9.el8.x86_64", "product_identification_helper": { "purl": "pkg:rpm/centos/dovecot-pigeonhole@2.3.8-9.el8?arch=x86_64&epoch=1" } } } ], "category": "architecture", "name": "x86_64" } ], "category": "vendor", "name": "Red Hat, Inc." }, { "branches": [ { "branches": [ { "category": "product_version", "name": "dovecot-pigeonhole-1:2.3.8-9.el8.tuxcare.els1.x86_64", "product": { "name": "dovecot-pigeonhole-1:2.3.8-9.el8.tuxcare.els1.x86_64", "product_id": "dovecot-pigeonhole-1:2.3.8-9.el8.tuxcare.els1.x86_64", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/dovecot-pigeonhole@2.3.8-9.el8.tuxcare.els1?arch=x86_64&epoch=1" } } }, { "category": "product_version", "name": "dovecot-pigeonhole-1:2.3.8-9.el8.tuxcare.els2.x86_64", "product": { "name": "dovecot-pigeonhole-1:2.3.8-9.el8.tuxcare.els2.x86_64", "product_id": "dovecot-pigeonhole-1:2.3.8-9.el8.tuxcare.els2.x86_64", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/dovecot-pigeonhole@2.3.8-9.el8.tuxcare.els2?arch=x86_64&epoch=1" } } } ], "category": "architecture", "name": "x86_64" } ], "category": "vendor", "name": "TuxCare" } ], "relationships": [ { "category": "default_component_of", "full_product_name": { "name": "dovecot-pigeonhole-1:2.3.8-9.el8.tuxcare.els1.x86_64 as a component of Community Enterprise Operating System 8.5", "product_id": "CentOS-8.5:dovecot-pigeonhole-1:2.3.8-9.el8.tuxcare.els1.x86_64" }, "product_reference": "dovecot-pigeonhole-1:2.3.8-9.el8.tuxcare.els1.x86_64", "relates_to_product_reference": "CentOS-8.5" }, { "category": "default_component_of", "full_product_name": { "name": "dovecot-pigeonhole-1:2.3.8-9.el8.tuxcare.els2.x86_64 as a component of Community Enterprise Operating System 8.5", "product_id": "CentOS-8.5:dovecot-pigeonhole-1:2.3.8-9.el8.tuxcare.els2.x86_64" }, "product_reference": "dovecot-pigeonhole-1:2.3.8-9.el8.tuxcare.els2.x86_64", "relates_to_product_reference": "CentOS-8.5" }, { "category": "default_component_of", "full_product_name": { "name": "dovecot-pigeonhole-1:2.3.8-9.el8.x86_64 as a component of Community Enterprise Operating System 8.5", "product_id": "CentOS-8.5:dovecot-pigeonhole-1:2.3.8-9.el8.x86_64" }, "product_reference": "dovecot-pigeonhole-1:2.3.8-9.el8.x86_64", "relates_to_product_reference": "CentOS-8.5" } ] }, "vulnerabilities": [ { "cve": "CVE-2020-10958", "cwe": { "id": "CWE-416", "name": "Use After Free" }, "notes": [ { "category": "description", "text": "In Dovecot before 2.3.10.1, a crafted SMTP/LMTP message triggers an unauthenticated use-after-free bug in submission-login, submission, or lmtp, and can lead to a crash under circumstances involving many newlines after a command.", "title": "Vulnerability description" }, { "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": { "known_affected": [ "CentOS-8.5:dovecot-pigeonhole-1:2.3.8-9.el8.tuxcare.els1.x86_64", "CentOS-8.5:dovecot-pigeonhole-1:2.3.8-9.el8.tuxcare.els2.x86_64", "CentOS-8.5:dovecot-pigeonhole-1:2.3.8-9.el8.x86_64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2020-10958" }, { "category": "external", "summary": "http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00059.html", "url": "http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00059.html" }, { "category": "external", "summary": "http://packetstormsecurity.com/files/157771/Open-Xchange-Dovecot-2.3.10-Null-Pointer-Dereference-Denial-Of-Service.html", "url": "http://packetstormsecurity.com/files/157771/Open-Xchange-Dovecot-2.3.10-Null-Pointer-Dereference-Denial-Of-Service.html" }, { "category": "external", "summary": "http://seclists.org/fulldisclosure/2020/May/37", "url": "http://seclists.org/fulldisclosure/2020/May/37" }, { "category": "external", "summary": "http://www.openwall.com/lists/oss-security/2020/05/18/1", "url": "http://www.openwall.com/lists/oss-security/2020/05/18/1" }, { "category": "external", "summary": "https://dovecot.org/security", "url": "https://dovecot.org/security" }, { "category": "external", "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TTZN2VW55ZC2AQBGBJMLRJSZIKSB2NS6/", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TTZN2VW55ZC2AQBGBJMLRJSZIKSB2NS6/" }, { "category": "external", "summary": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VVUWHUUAFPC6XGIXYFIPTNBXLHPNM4W6/", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VVUWHUUAFPC6XGIXYFIPTNBXLHPNM4W6/" }, { "category": "external", "summary": "https://usn.ubuntu.com/4361-1/", "url": "https://usn.ubuntu.com/4361-1/" }, { "category": "external", "summary": "https://www.debian.org/security/2020/dsa-4690", "url": "https://www.debian.org/security/2020/dsa-4690" }, { "category": "external", "summary": "https://www.openwall.com/lists/oss-security/2020/05/18/1", "url": "https://www.openwall.com/lists/oss-security/2020/05/18/1" } ], "release_date": "2020-05-18T14:15:00Z", "remediations": [ { "category": "no_fix_planned", "details": "CVE-2020-10958 is a use-after-free limited to Dovecot’s submission-login, submission, and lmtp services, triggered by sending a command with many trailing newlines and resulting only in a crash (availability impact) with no confidentiality or integrity effect. IMAP/POP services are not affected, and when submission or LMTP are bound to localhost or operate only behind an MTA, unauthenticated internet exposure to the vulnerable code path is inherently constrained. Given that exploitation yields only a restartable crash in these specific daemons and provides no data access or code execution, this can be safely deprioritized in managed enterprise VM/server environments.", "product_ids": [ "CentOS-8.5:dovecot-pigeonhole-1:2.3.8-9.el8.tuxcare.els1.x86_64", "CentOS-8.5:dovecot-pigeonhole-1:2.3.8-9.el8.tuxcare.els2.x86_64", "CentOS-8.5:dovecot-pigeonhole-1:2.3.8-9.el8.x86_64" ] } ], "scores": [ { "cvss_v2": { "accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0" }, "cvss_v3": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "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:L", "version": "3.1" }, "products": [ "CentOS-8.5:dovecot-pigeonhole-1:2.3.8-9.el8.tuxcare.els1.x86_64", "CentOS-8.5:dovecot-pigeonhole-1:2.3.8-9.el8.tuxcare.els2.x86_64", "CentOS-8.5:dovecot-pigeonhole-1:2.3.8-9.el8.x86_64" ] } ], "threats": [ { "category": "impact", "details": "Moderate" } ] } ] }