{"schema_version":"1.7.2","id":"OESA-2025-2881","modified":"2025-12-30T12:16:46Z","published":"2025-12-30T12:16:46Z","upstream":["CVE-2025-67726"],"summary":"python-tornado security update","details":"Tornado is an open source version of the scalable, non-blocking web server and tools.\r\n\r\nSecurity Fix(es):\n\nTornado is a Python web framework and asynchronous networking library. Versions 6.5.2 and below use an inefficient algorithm when parsing parameters for HTTP header values, potentially causing a DoS. The _parseparam function in httputil.py is used to parse specific HTTP header values, such as those in multipart/form-data and repeatedly calls string.count() within a nested loop while processing quoted semicolons. If an attacker sends a request with a large number of maliciously crafted parameters in a Content-Disposition header, the server's CPU usage increases quadratically (O(n²)) during parsing. Due to Tornado's single event loop architecture, a single malicious request can cause the entire server to become unresponsive for an extended period. This issue is fixed in version 6.5.3.(CVE-2025-67726)","affected":[{"package":{"ecosystem":"openEuler:24.03-LTS-SP1","name":"python-tornado","purl":"pkg:rpm/openEuler/python-tornado&distro=openEuler-24.03-LTS-SP1"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.5-2.oe2403sp1"}]}],"ecosystem_specific":{"aarch64":["python-tornado-debuginfo-6.5-2.oe2403sp1.aarch64.rpm","python-tornado-debugsource-6.5-2.oe2403sp1.aarch64.rpm","python-tornado-help-6.5-2.oe2403sp1.aarch64.rpm","python3-tornado-6.5-2.oe2403sp1.aarch64.rpm"],"src":["python-tornado-6.5-2.oe2403sp1.src.rpm"],"x86_64":["python-tornado-debuginfo-6.5-2.oe2403sp1.x86_64.rpm","python-tornado-debugsource-6.5-2.oe2403sp1.x86_64.rpm","python-tornado-help-6.5-2.oe2403sp1.x86_64.rpm","python3-tornado-6.5-2.oe2403sp1.x86_64.rpm"]}},{"package":{"ecosystem":"openEuler:24.03-LTS-SP2","name":"python-tornado","purl":"pkg:rpm/openEuler/python-tornado&distro=openEuler-24.03-LTS-SP2"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.5-2.oe2403sp2"}]}],"ecosystem_specific":{"aarch64":["python-tornado-debuginfo-6.5-2.oe2403sp2.aarch64.rpm","python-tornado-debugsource-6.5-2.oe2403sp2.aarch64.rpm","python-tornado-help-6.5-2.oe2403sp2.aarch64.rpm","python3-tornado-6.5-2.oe2403sp2.aarch64.rpm"],"src":["python-tornado-6.5-2.oe2403sp2.src.rpm"],"x86_64":["python-tornado-debuginfo-6.5-2.oe2403sp2.x86_64.rpm","python-tornado-debugsource-6.5-2.oe2403sp2.x86_64.rpm","python-tornado-help-6.5-2.oe2403sp2.x86_64.rpm","python3-tornado-6.5-2.oe2403sp2.x86_64.rpm"]}},{"package":{"ecosystem":"openEuler:20.03-LTS-SP4","name":"python-tornado","purl":"pkg:rpm/openEuler/python-tornado&distro=openEuler-20.03-LTS-SP4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.0.2-11.oe2003sp4"}]}],"ecosystem_specific":{"aarch64":["python-tornado-debuginfo-5.0.2-11.oe2003sp4.aarch64.rpm","python-tornado-debugsource-5.0.2-11.oe2003sp4.aarch64.rpm","python2-tornado-5.0.2-11.oe2003sp4.aarch64.rpm","python3-tornado-5.0.2-11.oe2003sp4.aarch64.rpm"],"src":["python-tornado-5.0.2-11.oe2003sp4.src.rpm"],"x86_64":["python-tornado-debuginfo-5.0.2-11.oe2003sp4.x86_64.rpm","python-tornado-debugsource-5.0.2-11.oe2003sp4.x86_64.rpm","python2-tornado-5.0.2-11.oe2003sp4.x86_64.rpm","python3-tornado-5.0.2-11.oe2003sp4.x86_64.rpm"]}},{"package":{"ecosystem":"openEuler:22.03-LTS-SP3","name":"python-tornado","purl":"pkg:rpm/openEuler/python-tornado&distro=openEuler-22.03-LTS-SP3"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1-5.oe2203sp3"}]}],"ecosystem_specific":{"aarch64":["python-tornado-debuginfo-6.1-5.oe2203sp3.aarch64.rpm","python-tornado-debugsource-6.1-5.oe2203sp3.aarch64.rpm","python-tornado-help-6.1-5.oe2203sp3.aarch64.rpm","python3-tornado-6.1-5.oe2203sp3.aarch64.rpm"],"src":["python-tornado-6.1-5.oe2203sp3.src.rpm"],"x86_64":["python-tornado-debuginfo-6.1-5.oe2203sp3.x86_64.rpm","python-tornado-debugsource-6.1-5.oe2203sp3.x86_64.rpm","python-tornado-help-6.1-5.oe2203sp3.x86_64.rpm","python3-tornado-6.1-5.oe2203sp3.x86_64.rpm"]}},{"package":{"ecosystem":"openEuler:22.03-LTS-SP4","name":"python-tornado","purl":"pkg:rpm/openEuler/python-tornado&distro=openEuler-22.03-LTS-SP4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1-5.oe2203sp4"}]}],"ecosystem_specific":{"aarch64":["python-tornado-debuginfo-6.1-5.oe2203sp4.aarch64.rpm","python-tornado-debugsource-6.1-5.oe2203sp4.aarch64.rpm","python-tornado-help-6.1-5.oe2203sp4.aarch64.rpm","python3-tornado-6.1-5.oe2203sp4.aarch64.rpm"],"src":["python-tornado-6.1-5.oe2203sp4.src.rpm"],"x86_64":["python-tornado-debuginfo-6.1-5.oe2203sp4.x86_64.rpm","python-tornado-debugsource-6.1-5.oe2203sp4.x86_64.rpm","python-tornado-help-6.1-5.oe2203sp4.x86_64.rpm","python3-tornado-6.1-5.oe2203sp4.x86_64.rpm"]}},{"package":{"ecosystem":"openEuler:24.03-LTS","name":"python-tornado","purl":"pkg:rpm/openEuler/python-tornado&distro=openEuler-24.03-LTS"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.5-2.oe2403"}]}],"ecosystem_specific":{"aarch64":["python-tornado-debuginfo-6.5-2.oe2403sp1.aarch64.rpm","python-tornado-debugsource-6.5-2.oe2403sp1.aarch64.rpm","python-tornado-help-6.5-2.oe2403sp1.aarch64.rpm","python3-tornado-6.5-2.oe2403sp1.aarch64.rpm","python-tornado-debuginfo-6.5-2.oe2403sp2.aarch64.rpm","python-tornado-debugsource-6.5-2.oe2403sp2.aarch64.rpm","python-tornado-help-6.5-2.oe2403sp2.aarch64.rpm","python3-tornado-6.5-2.oe2403sp2.aarch64.rpm","python-tornado-debuginfo-6.5-2.oe2403.aarch64.rpm","python-tornado-debugsource-6.5-2.oe2403.aarch64.rpm","python-tornado-help-6.5-2.oe2403.aarch64.rpm","python3-tornado-6.5-2.oe2403.aarch64.rpm"],"src":["python-tornado-6.5-2.oe2403sp1.src.rpm","python-tornado-6.5-2.oe2403sp2.src.rpm","python-tornado-6.5-2.oe2403.src.rpm"],"x86_64":["python-tornado-debuginfo-6.5-2.oe2403sp1.x86_64.rpm","python-tornado-debugsource-6.5-2.oe2403sp1.x86_64.rpm","python-tornado-help-6.5-2.oe2403sp1.x86_64.rpm","python3-tornado-6.5-2.oe2403sp1.x86_64.rp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