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{"acknowledgement": "Red Hat would like to thank Vasily Averin (Virtuozzo) for reporting this issue.", "affected_release": [{"advisory": "RHSA-2020:4062", "cpe": "cpe:/a:redhat:rhel_extras_rt:7", "package": "kernel-rt-0:3.10.0-1160.rt56.1131.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2020-09-29T00:00:00Z"}, {"advisory": "RHSA-2020:4060", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "kernel-0:3.10.0-1160.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2020-09-29T00:00:00Z"}], "bugzilla": {"description": "kernel: memory corruption in Voice over IP nf_conntrack_h323 module", "id": "1850716", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1850716"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.1", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-787", "details": ["An out-of-bounds memory write flaw was found in how the Linux kernel\u2019s Voice Over IP H.323 connection tracking functionality handled connections on ipv6 port 1720. This flaw allows an unauthenticated remote user to crash the system, causing a denial of service. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.", "An out-of-bounds memory write flaw was found in how the Linux kernel\u2019s Voice Over IP H.323 connection tracking functionality handled connections on ipv6 port 1720. This flaw allows an unauthenticated remote user to crash the system, causing a denial of service. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability."], "mitigation": {"lang": "en:us", "value": "A mitigation to this flaw would be to no longer use IPV6 on affected hardware until the kernel has been updated or to disable Voice Over IP H.323 module. Existing systems that have h323-conntrack-nat kernel module loaded will need to unload the \"nf_conntrack_h323\" kernel module and blacklist it ( See https://access.redhat.com/solutions/41278 for a guide on how to blacklist modules)."}, "name": "CVE-2020-14305", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-alt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/a:redhat:enterprise_mrg:2", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise MRG 2"}], "public_date": "2020-06-09T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2020-14305\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-14305\nhttps://bugs.openvz.org/browse/OVZ-7188\nhttps://patchwork.ozlabs.org/project/netfilter-devel/patch/[email protected]/"], "statement": "This issue is rated as having Moderate impact because of being limited to only IPV6 port 1720 being used and if with particular module (nf_conntrack_h323) for Voice Over IP H.323.", "threat_severity": "Moderate", "upstream_fix": "kernel 4.12-rc1"}