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{"bugzilla": {"description": "zeromq: Heap overflow when receiving malformed ZMTP v1 packets", "id": "1921983", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1921983"}, "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": "draft"}, "cwe": "CWE-120->CWE-787", "details": ["There's a flaw in the zeromq server in versions before 4.3.3 in src/decoder_allocators.hpp. The decoder static allocator could have its sized changed, but the buffer would remain the same as it is a static buffer. A remote, unauthenticated attacker who sends a crafted request to the zeromq server could trigger a buffer overflow WRITE of arbitrary data if CURVE/ZAP authentication is not enabled. The greatest impact of this flaw is to application availability, data integrity, and confidentiality.", "There's a flaw in the zeromq server in src/decoder_allocators.hpp. The decoder static allocator could have its sized changed, but the buffer would remain the same as it is a static buffer. A remote, unauthenticated attacker who sends a crafted request to the zeromq server could trigger a buffer overflow WRITE of arbitrary data if CURVE/ZAP authentication is not enabled. The greatest impact of this flaw is to application availability, data integrity, and confidentiality."], "name": "CVE-2021-20235", "package_state": [{"cpe": "cpe:/a:redhat:ceph_storage:2", "fix_state": "Out of support scope", "package_name": "zeromq3", "product_name": "Red Hat Ceph Storage 2"}], "public_date": "2020-09-07T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-20235\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-20235\nhttps://github.com/zeromq/libzmq/security/advisories/GHSA-fc3w-qxf5-7hp6"], "threat_severity": "Moderate", "upstream_fix": "zeromq 4.3.3"}