{"id":"CVE-2022-24795","aliases":["GHSA-jj47-x69x-mxrm"],"url":"https://o3.security/vulnerability/CVE-2022-24795","summary":"Buffer Overflow and Integer Overflow in yajl-ruby","details":"_NOTE: A previous patch, 1.4.2, fixed the heap memory issue, but could still lead to a DoS infinite loop. Please update to version 1.4.3_\n\nThe 1.x branch and the 2.x branch of [yajl](https://github.com/lloyd/yajl) contain an integer overflow which leads to subsequent heap memory corruption when dealing with large (~2GB) inputs.\n\n### Details\n\nThe [reallocation logic at yajl_buf.c#L64](https://github.com/brianmario/yajl-ruby/blob/7168bd79b888900aa94523301126f968a93eb3a6/ext/yajl/yajl_buf.c#L64) may result in the `need` 32bit integer wrapping to 0 when `need` approaches a value of 0x80000000 (i.e. ~2GB of data), which results in a reallocation of buf->alloc into a small heap chunk.\n\nThese integers are declared as `size_t` in the 2.x branch of `yajl`, which practically prevents the issue from triggering on 64bit platforms, however this does not preclude this issue triggering on 32bit builds on which `size_t` is a 32bit integer.\n\nSubsequent population of this under-allocated heap chunk is based on the original buffer size, leading to heap memory corruption.\n\n### Impact\n\nWe rate this as a moderate severity vulnerability which mostly impacts process availability as we believe exploitation for arbitrary code execution to be unlikely.\n\n### Patches\n\nPatched in yajl-ruby 1.4.3\n\n### Workarounds\n\nAvoid passing large inputs to YAJL\n\n### References\nhttps://github.com/brianmario/yajl-ruby/blob/7168bd79b888900aa94523301126f968a93eb3a6/ext/yajl/yajl_buf.c#L64\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [yajl-ruby](https://github.com/brianmario/yajl-ruby/issues)\n","published":"2022-04-05T00:00:00Z","modified":"2026-08-12T03:51:09.369877053Z","cvss":{"score":5.9,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":2,"affectedPackages":[{"ecosystem":"RubyGems","name":"yajl-ruby","fixedVersion":"1.4.3"}],"fix":{"url":"https://github.com/brianmario/yajl-ruby/commit/7168bd79b888900aa94523301126f968a93eb3a6","label":"brianmario/yajl-ruby@7168bd7"},"references":[{"type":"WEB","url":"https://github.com/brianmario/yajl-ruby/blob/7168bd79b888900aa94523301126f968a93eb3a6/ext/yajl/yajl_buf.c#L64"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/24xxx/CVE-2022-24795.json"},{"type":"ADVISORY","url":"https://github.com/brianmario/yajl-ruby/security/advisories/GHSA-jj47-x69x-mxrm"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KLE3C4CECEJ4EUYI56KXI6OWACWXX7WN/"},{"type":"ADVISORY","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YO32YDJ74DADC7CMJNLSLBVWN5EXGF5J/"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-24795"},{"type":"FIX","url":"https://github.com/brianmario/yajl-ruby/commit/7168bd79b888900aa94523301126f968a93eb3a6"},{"type":"ARTICLE","url":"https://lists.debian.org/debian-lts-announce/2023/07/msg00013.html"},{"type":"ARTICLE","url":"https://lists.debian.org/debian-lts-announce/2023/08/msg00003.html"},{"type":"PACKAGE","url":"https://github.com/brianmario/yajl-ruby"},{"type":"WEB","url":"https://github.com/rubysec/ruby-advisory-db/blob/master/gems/yajl-ruby/CVE-2022-24795.yml"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KLE3C4CECEJ4EUYI56KXI6OWACWXX7WN"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YO32YDJ74DADC7CMJNLSLBVWN5EXGF5J"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:09.369877053Z"}}