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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:*", "matchCriteriaId": "E1E32895-9C7B-4DE8-9BB5-0177406EB761", "versionEndIncluding": "2.22", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The process_envvars function in elf/rtld.c in the GNU C Library (aka glibc or libc6) before 2.23 allows local users to bypass a pointer-guarding protection mechanism via a zero value of the LD_POINTER_GUARD environment variable."}, {"lang": "es", "value": "La funci\u00f3n process_envvars en elf/rtld.c en la GNU C Library (tambi\u00e9n conocida como glibc o libc6) en versiones anteriores a 2.23 permite a usuarios locales eludir un mecanismo de protecci\u00f3n de puntero a trav\u00e9s de un valor cero de la variable de entorno LD_POINTER_GUARD."}], "id": "CVE-2015-8777", "lastModified": "2018-01-05T02:30:21.430", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 2.1, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:L/AC:L/Au:N/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N", "version": "3.0"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2016-01-20T05:59:01.237", "references": [{"source": "secalert@redhat.com", "tags": ["Exploit"], "url": "http://hmarco.org/bugs/glibc_ptr_mangle_weakness.html"}, {"source": "secalert@redhat.com", "url": "http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177404.html"}, {"source": "secalert@redhat.com", "url": "http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00036.html"}, {"source": "secalert@redhat.com", "url": "http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00037.html"}, {"source": "secalert@redhat.com", "url": "http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00038.html"}, {"source": "secalert@redhat.com", "url": "http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00039.html"}, {"source": "secalert@redhat.com", "url": "http://www.debian.org/security/2016/dsa-3480"}, {"source": "secalert@redhat.com", "url": "http://www.openwall.com/lists/oss-security/2016/01/20/1"}, {"source": "secalert@redhat.com", "url": "http://www.securityfocus.com/bid/81469"}, {"source": "secalert@redhat.com", "url": "http://www.securitytracker.com/id/1034811"}, {"source": "secalert@redhat.com", "url": "http://www.ubuntu.com/usn/USN-2985-1"}, {"source": "secalert@redhat.com", "url": "http://www.ubuntu.com/usn/USN-2985-2"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2017:1916"}, {"source": "secalert@redhat.com", "url": "https://security.gentoo.org/glsa/201702-11"}, {"source": "secalert@redhat.com", "url": "https://sourceware.org/bugzilla/show_bug.cgi?id=18928"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-254"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2017:1916", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "glibc-0:2.17-196.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2017-08-01T00:00:00Z"}], "bugzilla": {"description": "glibc: LD_POINTER_GUARD in the environment is not sanitized", "id": "1260581", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1260581"}, "csaw": false, "cvss": {"cvss_base_score": "3.7", "cvss_scoring_vector": "AV:L/AC:H/Au:N/C:P/I:P/A:P", "status": "verified"}, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "details": ["The process_envvars function in elf/rtld.c in the GNU C Library (aka glibc or libc6) before 2.23 allows local users to bypass a pointer-guarding protection mechanism via a zero value of the LD_POINTER_GUARD environment variable.", "It was found that the dynamic loader did not sanitize the LD_POINTER_GUARD environment variable. An attacker could use this flaw to bypass the pointer guarding protection on set-user-ID or set-group-ID programs to execute arbitrary code with the permissions of the user running the application."], "mitigation": {"lang": "en:us", "value": "The glibc pointer guard is a post-exploitation mitigation mechanism. As such, it is only relevant if there are exploitable security vulnerabilities in the system. Therefore, applying available security updates to the system is a possible mitigation for this issue.\nIn typical deployments, environment variables can only be set by users with shell access. Restricting shell access to trusted users is another possible mitigation."}, "name": "CVE-2015-8777", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Will not fix", "package_name": "glibc", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Will not fix", "package_name": "glibc", "product_name": "Red Hat Enterprise Linux 6"}], "public_date": "2015-09-05T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2015-8777\nhttps://nvd.nist.gov/vuln/detail/CVE-2015-8777"], "threat_severity": "Low"}