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{"bugzilla": {"description": "rsync: Rsync: Denial of Service via malformed HTTP proxy response", "id": "2480057", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2480057"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.9", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-193", "details": ["A flaw was found in rsync. A network attacker can exploit an off-by-one out-of-bounds stack write vulnerability in the `establish_proxy_connection()` function by sending a malformed HTTP proxy response. This occurs when the `RSYNC_PROXY` environment variable is set and the attacker sends a response line of 1023 or more bytes without a newline terminator. This can corrupt stack memory, potentially leading to a Denial of Service (DoS)."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, ensure that the `RSYNC_PROXY` environment variable is not set. If rsync is configured to use an HTTP proxy via this variable, unsetting it will prevent exploitation. To unset the `RSYNC_PROXY` environment variable for the current session, use: `unset RSYNC_PROXY`. For a more permanent solution, ensure that `RSYNC_PROXY` is not defined in system-wide or user-specific environment configuration files. Note that this mitigation will disable rsync's ability to use an HTTP proxy, which may impact functionality if proxy usage is required."}, "name": "CVE-2026-45232", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "rsync", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Fix deferred", "package_name": "rsync", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "rsync", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "rsync", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "rsync", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "rhcos", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-05-20T00:45:28Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-45232\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-45232\nhttps://github.com/RsyncProject/rsync/releases/tag/v3.4.3\nhttps://github.com/RsyncProject/rsync/security/advisories/GHSA-8f85-j2cv-59m8\nhttps://www.vulncheck.com/advisories/rsync-off-by-one-stack-write-via-http-proxy"], "threat_severity": "Moderate"}

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