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{"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"}