{"id":"CVE-2020-17527","details":"While investigating bug 64830 it was discovered that Apache Tomcat 10.0.0-M1 to 10.0.0-M9, 9.0.0-M1 to 9.0.39 and 8.5.0 to 8.5.59 could re-use an HTTP request header value from the previous stream received on an HTTP/2 connection for the request associated with the subsequent stream. While this would most likely lead to an error and the closure of the HTTP/2 connection, it is possible that information could leak between requests.","aliases":["BIT-tomcat-2020-17527","GHSA-vvw4-rfwf-p6hx"],"modified":"2026-04-16T04:38:57.690734486Z","published":"2020-12-03T19:15:12.200Z","related":["SUSE-SU-2021:0031-1","SUSE-SU-2021:0040-1","SUSE-SU-2021:0041-1","SUSE-SU-2021:0042-1","SUSE-SU-2026:1058-1","openSUSE-SU-2021:0043-1","openSUSE-SU-2021:0081-1","openSUSE-SU-2024:11468-1","openSUSE-SU-2024:13441-1"],"references":[{"type":"WEB","url":"https://lists.apache.org/thread.html/r26a2a66339087fc37db3caf201e446d3e83b5cce314371e235ff1784%40%3Ccommits.tomee.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r2d6e05c5ff96f8068a59dfdb3800e9ee8d4e36ce1971783c6e5f9b20%40%3Ccommits.tomee.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/ra9fcdb904dd2e2256ef90b3e4ced279cd464cb0ab63a6c64df5c010d%40%3Cannounce.tomcat.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rabbe6b3ae6a9795641d7a05c00d2378d5bbbe4240b7e20f09b092cce%40%3Cissues.guacamole.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rce5ac9a40173651d540babce59f6f3825f12c6d4e886ba00823b11e5%40%3Cannounce.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r5a285242737ddef4d338236328aaaf3237183e1465a5efafd16b99ed%40%3Cdev.tomcat.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r8a227ac6a755a6406c1cc47dd48800e973d4cf13fe7fe68ac59c679c%40%3Cdev.tomcat.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/ra9fcdb904dd2e2256ef90b3e4ced279cd464cb0ab63a6c64df5c010d%40%3Cannounce.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rbba08c4dcef3603e36276d49adda8eedbe458c5104314b4038f697e1%40%3Cusers.tomcat.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r9fd47f1b03e9b41d16a5cf72659b533887267d3398d963c2fff3abfa%40%3Ccommits.tomee.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/ra35c8d617b17d59f400112cebadec43ad379f98198b4a9726190d7ee%40%3Cissues.guacamole.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/raa0e9ad388c1e6fd1e301b5e080f9439f64cb4178119a86a4801cc53%40%3Cdev.tomcat.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rd5babd13d7a350b369b2f647b4dd32ce678af42f9aba5389df1ae6ca%40%3Cusers.tomcat.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rca833c6d42b7b9ce1563488c0929f29fcc95947d86e5e740258c8937%40%3Cdev.tomcat.apache.org%3E"},{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2020/12/03/3"},{"type":"ADVISORY","url":"https://lists.apache.org/thread.html/rce5ac9a40173651d540babce59f6f3825f12c6d4e886ba00823b11e5%40%3Cannounce.tomcat.apache.org%3E"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20201210-0003/"},{"type":"ADVISORY","url":"https://www.debian.org/security/2021/dsa-4835"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2020/12/msg00022.html"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202012-23"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpuApr2021.html"},{"type":"FIX","url":"https://www.oracle.com//security-alerts/cpujul2021.html"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpuapr2022.html"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpujan2022.html"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/apache/tomcat","events":[{"introduced":"389365303d986b2a918bc95f39421b27a2c9ff30"},{"last_affected":"c042ec71219dbde3e1ce0381ce5be0801120d0fa"},{"introduced":"3c78e95e36268dfb76db1570f0cf49104fa6eabc"},{"last_affected":"fc2c65d390444d75412855ad0de8b878018d02dc"},{"introduced":"0"},{"last_affected":"10e04de1946981261a734507f4a6d953e2a206fe"},{"introduced":"0"},{"last_affected":"65ddc3a3872ea41ca67fec7b6834c704b6893361"},{"introduced":"0"},{"last_affected":"b5a74e3c7913c560648f0ffedfbbb3ebe4318def"},{"introduced":"0"},{"last_affected":"de128d72af746184e035ff1b53629f08cb141a04"},{"introduced":"0"},{"last_affected":"aac670afe1226e10513021100fce8a12344743c6"},{"introduced":"0"},{"last_affected":"c2c8107f0cea4755497a85990807b883b66f6b57"},{"introduced":"0"},{"last_affected":"8c48678b110f3fbbe66f6dde0e45d2578fa92c29"},{"introduced":"0"},{"last_affected":"9c5edb840d9413c1408e7c191bc0e1bbfcd9e07f"},{"introduced":"0"},{"last_affected":"59e713216cf2256aacc54f6ba627865f356f9e4e"},{"introduced":"0"},{"last_affected":"7dc5e29fe49850102261badf158752d6865311e4"},{"introduced":"0"},{"last_affected":"600dc8ba5d9be7599d29bff83c342213d93b034e"},{"introduced":"0"},{"last_affected":"3bd48aab236e5bf0ed1644e9f0c588fd20e503ab"},{"introduced":"0"},{"last_affected":"642d3dd4d50ea1f03f9827962e4fc982a123bb78"},{"introduced":"0"},{"last_affected":"24566c02fb917a6ca1b6479a60971b0d8acd895c"},{"introduced":"0"},{"last_affected":"cac0e029dcced854eeca7444710e78e412dc2c2a"},{"introduced":"0"},{"last_affected":"c5efed313de1a181f4f9f98f5023117f3b911257"},{"introduced":"0"},{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