CVE-2022-22823

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{"affected_release": [{"advisory": "RHSA-2022:0824", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "firefox-0:91.7.0-3.el7_9", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2022-03-10T00:00:00Z"}, {"advisory": "RHSA-2022:0850", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "thunderbird-0:91.7.0-2.el7_9", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2022-03-14T00:00:00Z"}, {"advisory": "RHSA-2022:1069", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "expat-0:2.1.0-14.el7_9", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2022-03-28T00:00:00Z"}, {"advisory": "RHSA-2022:0818", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "firefox-0:91.7.0-3.el8_5", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2022-03-10T00:00:00Z"}, {"advisory": "RHSA-2022:0845", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "thunderbird-0:91.7.0-2.el8_5", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2022-03-14T00:00:00Z"}, {"advisory": "RHSA-2022:0951", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "expat-0:2.2.5-4.el8_5.3", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2022-03-16T00:00:00Z"}, {"advisory": "RHSA-2022:7692", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "xmlrpc-c-0:1.51.0-8.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2022-11-08T00:00:00Z"}, {"advisory": "RHBA-2022:4046", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "expat-0:2.2.10-12.el9_0", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2022-05-17T00:00:00Z"}, {"advisory": "RHBA-2022:4046", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "expat-0:2.2.10-12.el9_0", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2022-05-17T00:00:00Z"}, {"advisory": "RHSA-2022:7144", "cpe": "cpe:/a:redhat:jboss_core_services:1", "package": "expat", "product_name": "Text-Only JBCS", "release_date": "2022-10-26T00:00:00Z"}], "bugzilla": {"description": "expat: Integer overflow in build_model in xmlparse.c", "id": "2044464", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2044464"}, "csaw": false, "cvss3": {"cvss3_base_score": "9.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-190", "details": ["build_model in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.", "expat (libexpat) is susceptible to a software flaw that causes process interruption. When processing a large number of prefixed XML attributes on a single tag can libexpat can terminate unexpectedly due to integer overflow. The highest threat from this vulnerability is to availability, confidentiality and integrity."], "name": "CVE-2022-22823", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "expat", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "xulrunner", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Will not fix", "package_name": "xulrunner", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "xmlrpc-c", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2022-01-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-22823\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-22823\nhttps://github.com/libexpat/libexpat/pull/539"], "statement": "This is an important rather than a critical vulnerability due to its practical limitations. The flaw arises from unsafe left-shift operations in storeAtts() within libexpat, which, under extreme conditions (e.g., over 2²⁹ prefixed attributes), can lead to undefined behavior, memory mismanagement, and denial-of-service (DoS). However, exploitation requires specially crafted XML payloads several gigabytes in size (~6.5 GiB), which makes remote exploitation unlikely in real-world environments due to common upload limits and resource constraints. There is no evidence of arbitrary code execution, memory corruption leading to privilege escalation, or data leaks.", "threat_severity": "Important"}

{}