{"id":"CVE-2021-37136","aliases":["GHSA-grg4-wf29-r9vv"],"url":"https://o3.security/vulnerability/CVE-2021-37136","summary":"Bzip2Decoder doesn't allow setting size restrictions for decompressed data","details":"### Impact\nThe Bzip2 decompression decoder function doesn't allow setting size restrictions on the decompressed output data (which affects the allocation size used during decompression).\n\n\nAll users of Bzip2Decoder are affected. The malicious input can trigger an OOME and so a DoS attack\n\n### Workarounds\nNo workarounds other than not using the `Bzip2Decoder`\n\n### References\n\nRelevant code areas:\n\nhttps://github.com/netty/netty/blob/netty-4.1.67.Final/codec/src/main/java/io/netty/handler/codec/compression/Bzip2Decoder.java#L80\nhttps://github.com/netty/netty/blob/netty-4.1.67.Final/codec/src/main/java/io/netty/handler/codec/compression/Bzip2Decoder.java#L294\nhttps://github.com/netty/netty/blob/netty-4.1.67.Final/codec/src/main/java/io/netty/handler/codec/compression/Bzip2Decoder.java#L305","published":"2021-10-19T15:15:07.697Z","modified":"2026-08-27T03:49:08.104571402Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"io.netty:netty-codec","fixedVersion":"4.1.68.Final"},{"ecosystem":"Maven","name":"org.jboss.netty:netty","fixedVersion":null},{"ecosystem":"Maven","name":"io.netty:netty","fixedVersion":null}],"fix":{"url":"https://github.com/netty/netty/commit/41d3d61a61608f2223bb364955ab2045dd5e4020","label":"netty/netty@41d3d61"},"references":[{"type":"WEB","url":"https://lists.apache.org/thread.html/r06a145c9bd41a7344da242cef07977b24abe3349161ede948e30913d%40%3Ccommits.druid.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r5406eaf3b07577d233b9f07cfc8f26e28369e6bab5edfcab41f28abb%40%3Ccommits.druid.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r5e05eba32476c580412f9fbdfc9b8782d5b40558018ac4ac07192a04%40%3Ccommits.druid.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r75490c61c2cb7b6ae2c81238fd52ae13636c60435abcd732d41531a0%40%3Ccommits.druid.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rd262f59b1586a108e320e5c966feeafbb1b8cdc96965debc7cc10b16%40%3Ccommits.druid.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rfb2bf8597e53364ccab212fbcbb2a4e9f0a9e1429b1dc08023c6868e%40%3Cdev.tinkerpop.apache.org%3E"},{"type":"ADVISORY","url":"https://github.com/netty/netty/security/advisories/GHSA-grg4-wf29-r9vv"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2023/01/msg00008.html"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20220210-0012/"},{"type":"ADVISORY","url":"https://www.debian.org/security/2023/dsa-5316"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpuapr2022.html"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpujan2022.html"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpujul2022.html"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-37136"},{"type":"WEB","url":"https://github.com/netty/netty/commit/41d3d61a61608f2223bb364955ab2045dd5e4020"},{"type":"WEB","url":"https://security.netapp.com/advisory/ntap-20220210-0012"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rfb2bf8597e53364ccab212fbcbb2a4e9f0a9e1429b1dc08023c6868e@%3Cdev.tinkerpop.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rd262f59b1586a108e320e5c966feeafbb1b8cdc96965debc7cc10b16@%3Ccommits.druid.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r75490c61c2cb7b6ae2c81238fd52ae13636c60435abcd732d41531a0@%3Ccommits.druid.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r5e05eba32476c580412f9fbdfc9b8782d5b40558018ac4ac07192a04@%3Ccommits.druid.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r5406eaf3b07577d233b9f07cfc8f26e28369e6bab5edfcab41f28abb@%3Ccommits.druid.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r06a145c9bd41a7344da242cef07977b24abe3349161ede948e30913d@%3Ccommits.druid.apache.org%3E"},{"type":"WEB","url":"https://github.com/netty/netty/blob/4.1/codec/src/main/java/io/netty/handler/codec/compression/Bzip2Decoder.java#L80"},{"type":"WEB","url":"https://github.com/netty/netty/blob/4.1/codec/src/main/java/io/netty/handler/codec/compression/Bzip2Decoder.java#L305"},{"type":"WEB","url":"https://github.com/netty/netty/blob/4.1/codec/src/main/java/io/netty/handler/codec/compression/Bzip2Decoder.java#L294"},{"type":"PACKAGE","url":"https://github.com/netty/netty"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-27T03:49:08.104571402Z"}}