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{"affected_release": [{"advisory": "RHSA-2021:5208", "cpe": "cpe:/a:redhat:openshift:4.8::el7", "package": "haproxy-0:2.2.13-2.el7", "product_name": "Red Hat OpenShift Container Platform 4.8", "release_date": "2022-01-05T00:00:00Z"}, {"advisory": "RHSA-2021:4118", "cpe": "cpe:/a:redhat:openshift:4.9::el8", "package": "haproxy-0:2.2.15-2.el8", "product_name": "Red Hat OpenShift Container Platform 4.9", "release_date": "2021-11-10T00:00:00Z"}], "bugzilla": {"description": "haproxy: it can lead to a situation with an attacker-controlled HTTP Host header because a mismatch between Host and authority is mishandled", "id": "1995112", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1995112"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "status": "verified"}, "cwe": "CWE-20", "details": ["An issue was discovered in HAProxy 2.2 before 2.2.16, 2.3 before 2.3.13, and 2.4 before 2.4.3. It can lead to a situation with an attacker-controlled HTTP Host header, because a mismatch between Host and authority is mishandled.", "haproxy was found to be vulnerable to HTTP host header attack: This problem creates a scenario in which it's possible to drop the Host header and use the authority only after forwarding to a\nsecond http2 layer, possibly causing two differing values of Host at a different stage. The highest threat from this vulnerability is data integrity."], "name": "CVE-2021-39242", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "haproxy", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "haproxy", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "haproxy", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "haproxy", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:3.11", "fix_state": "Out of support scope", "package_name": "haproxy", "product_name": "Red Hat OpenShift Container Platform 3.11"}, {"cpe": "cpe:/a:redhat:rhel_software_collections:3", "fix_state": "Not affected", "package_name": "rh-haproxy18-haproxy", "product_name": "Red Hat Software Collections"}], "public_date": "2021-08-17T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-39242\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-39242"], "threat_severity": "Moderate", "upstream_fix": "haproxy 2.4.3, haproxy 2.3.13, haproxy 2.2.16"}