{ "document": { "aggregate_severity": { "text": "High" }, "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/centos7els/vex/2018/cve-2018-6829-els_os-centos7els.json" } ], "tracking": { "current_release_date": "2026-06-12T15:45:26Z", "generator": { "date": "2026-06-12T15:45:26Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2018-6829-ELS_OS-CENTOS7ELS", "initial_release_date": "2018-02-07T23:29:00Z", "revision_history": [ { "date": "2018-02-07T23:29:00Z", "number": "1", "summary": "Initial version" }, { "date": "2025-10-16T19:12:35Z", "number": "2", "summary": "Official Publication" }, { "date": "2025-12-23T20:55:41Z", "number": "3", "summary": "Update document" }, { "date": "2026-06-12T15:45:26Z", "number": "4", "summary": "Update document" } ], "status": "final", "version": "4" }, "title": "Security update on CVE-2018-6829" }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Community Enterprise Operating System 7", "product": { "name": "Community Enterprise Operating System 7", "product_id": "CentOS-7", "product_identification_helper": { "cpe": "cpe:2.3:o:centos:centos:7:*:*:*:*:*:*:*" } } } ], "category": "product_family", "name": "Community Enterprise Operating System" } ], "category": "vendor", "name": "Red Hat, Inc." }, { "branches": [ { "branches": [ { "category": "product_version", "name": "libgcrypt-0:1.5.3-14.el7.tuxcare.els1.i686", "product": { "name": "libgcrypt-0:1.5.3-14.el7.tuxcare.els1.i686", "product_id": "libgcrypt-0:1.5.3-14.el7.tuxcare.els1.i686", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/libgcrypt@1.5.3-14.el7.tuxcare.els1?arch=i686" } } }, { "category": "product_version", "name": "libgcrypt-devel-0:1.5.3-14.el7.tuxcare.els1.i686", "product": { "name": "libgcrypt-devel-0:1.5.3-14.el7.tuxcare.els1.i686", "product_id": "libgcrypt-devel-0:1.5.3-14.el7.tuxcare.els1.i686", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/libgcrypt-devel@1.5.3-14.el7.tuxcare.els1?arch=i686" } } } ], "category": "architecture", "name": "i686" }, { "branches": [ { "category": "product_version", "name": "libgcrypt-0:1.5.3-14.el7.tuxcare.els1.x86_64", "product": { "name": "libgcrypt-0:1.5.3-14.el7.tuxcare.els1.x86_64", "product_id": "libgcrypt-0:1.5.3-14.el7.tuxcare.els1.x86_64", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/libgcrypt@1.5.3-14.el7.tuxcare.els1?arch=x86_64" } } }, { "category": "product_version", "name": "libgcrypt-devel-0:1.5.3-14.el7.tuxcare.els1.x86_64", "product": { "name": "libgcrypt-devel-0:1.5.3-14.el7.tuxcare.els1.x86_64", "product_id": "libgcrypt-devel-0:1.5.3-14.el7.tuxcare.els1.x86_64", "product_identification_helper": { "purl": "pkg:rpm/tuxcare/libgcrypt-devel@1.5.3-14.el7.tuxcare.els1?arch=x86_64" } } } ], "category": "architecture", "name": "x86_64" } ], "category": "vendor", "name": "TuxCare" } ], "relationships": [ { "category": "default_component_of", "full_product_name": { "name": "libgcrypt-0:1.5.3-14.el7.tuxcare.els1.i686 as a component of Community Enterprise Operating System 7", "product_id": "CentOS-7:libgcrypt-0:1.5.3-14.el7.tuxcare.els1.i686" }, "product_reference": "libgcrypt-0:1.5.3-14.el7.tuxcare.els1.i686", "relates_to_product_reference": "CentOS-7" }, { "category": "default_component_of", "full_product_name": { "name": "libgcrypt-0:1.5.3-14.el7.tuxcare.els1.x86_64 as a component of Community Enterprise Operating System 7", "product_id": "CentOS-7:libgcrypt-0:1.5.3-14.el7.tuxcare.els1.x86_64" }, "product_reference": "libgcrypt-0:1.5.3-14.el7.tuxcare.els1.x86_64", "relates_to_product_reference": "CentOS-7" }, { "category": "default_component_of", "full_product_name": { "name": "libgcrypt-devel-0:1.5.3-14.el7.tuxcare.els1.i686 as a component of Community Enterprise Operating System 7", "product_id": "CentOS-7:libgcrypt-devel-0:1.5.3-14.el7.tuxcare.els1.i686" }, "product_reference": "libgcrypt-devel-0:1.5.3-14.el7.tuxcare.els1.i686", "relates_to_product_reference": "CentOS-7" }, { "category": "default_component_of", "full_product_name": { "name": "libgcrypt-devel-0:1.5.3-14.el7.tuxcare.els1.x86_64 as a component of Community Enterprise Operating System 7", "product_id": "CentOS-7:libgcrypt-devel-0:1.5.3-14.el7.tuxcare.els1.x86_64" }, "product_reference": "libgcrypt-devel-0:1.5.3-14.el7.tuxcare.els1.x86_64", "relates_to_product_reference": "CentOS-7" } ] }, "vulnerabilities": [ { "cve": "CVE-2018-6829", "cwe": { "id": "CWE-327", "name": "Use of a Broken or Risky Cryptographic Algorithm" }, "notes": [ { "category": "description", "text": "cipher/elgamal.c in Libgcrypt through 1.8.2, when used to encrypt messages directly, improperly encodes plaintexts, which allows attackers to obtain sensitive information by reading ciphertext data (i.e., it does not have semantic security in face of a ciphertext-only attack). The Decisional Diffie-Hellman (DDH) assumption does not hold for Libgcrypt's ElGamal implementation.", "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" }, { "category": "other", "text": "TuxCare has assessed that this vulnerability does not impact any currently supported TuxCare products. This evaluation may change as new information becomes available. For additional details regarding this vulnerability and affected products, refer to the provided references.", "title": "Statement" } ], "product_status": { "known_not_affected": [ "CentOS-7:libgcrypt-0:1.5.3-14.el7.tuxcare.els1.i686", "CentOS-7:libgcrypt-0:1.5.3-14.el7.tuxcare.els1.x86_64", "CentOS-7:libgcrypt-devel-0:1.5.3-14.el7.tuxcare.els1.i686", "CentOS-7:libgcrypt-devel-0:1.5.3-14.el7.tuxcare.els1.x86_64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2018-6829" }, { "category": "external", "summary": "https://github.com/weikengchen/attack-on-libgcrypt-elgamal", "url": "https://github.com/weikengchen/attack-on-libgcrypt-elgamal" }, { "category": "external", "summary": "https://github.com/weikengchen/attack-on-libgcrypt-elgamal/wiki", "url": "https://github.com/weikengchen/attack-on-libgcrypt-elgamal/wiki" }, { "category": "external", "summary": "https://lists.gnupg.org/pipermail/gcrypt-devel/2018-February/004394.html", "url": "https://lists.gnupg.org/pipermail/gcrypt-devel/2018-February/004394.html" }, { "category": "external", "summary": "https://www.oracle.com/security-alerts/cpujan2020.html", "url": "https://www.oracle.com/security-alerts/cpujan2020.html" } ], "release_date": "2018-02-07T23:29:00Z", "scores": [ { "cvss_v2": { "accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.0, "baseSeverity": "MEDIUM", "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0" }, "cvss_v3": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.0" }, "products": [ "CentOS-7:libgcrypt-0:1.5.3-14.el7.tuxcare.els1.i686", "CentOS-7:libgcrypt-0:1.5.3-14.el7.tuxcare.els1.x86_64", "CentOS-7:libgcrypt-devel-0:1.5.3-14.el7.tuxcare.els1.i686", "CentOS-7:libgcrypt-devel-0:1.5.3-14.el7.tuxcare.els1.x86_64" ] } ], "threats": [ { "category": "impact", "details": "Important" }, { "category": "impact", "date": "2026-06-12T13:01:40.751719Z", "details": "Not vulnerable: CVE-2018-6829 only applies when an application misuses libgcrypt by performing direct ElGamal message encryption; libgcrypt’s ElGamal primitive is intended for hybrid encryption (e.g., encrypting a symmetric session key) and is not semantically secure for raw message encryption. This environment does not implement or expose any direct ElGamal message‑encryption operation via libgcrypt 1.5.3, so the vulnerable code path is not reachable.", "product_ids": [ "CentOS-7:libgcrypt-0:1.5.3-14.el7.tuxcare.els1.i686", "CentOS-7:libgcrypt-0:1.5.3-14.el7.tuxcare.els1.x86_64", "CentOS-7:libgcrypt-devel-0:1.5.3-14.el7.tuxcare.els1.i686", "CentOS-7:libgcrypt-devel-0:1.5.3-14.el7.tuxcare.els1.x86_64" ] } ] } ] }