{"id":"CVE-2018-14779","details":"A buffer overflow issue was discovered in the Yubico-Piv 1.5.0 smartcard driver. The file lib/ykpiv.c contains the following code in the function `ykpiv_transfer_data()`: {% highlight c %} if(*out_len + recv_len - 2 \u003e max_out) { fprintf(stderr, \"Output buffer to small, wanted to write %lu, max was %lu.\", *out_len + recv_len - 2, max_out); } if(out_data) { memcpy(out_data, data, recv_len - 2); out_data += recv_len - 2; *out_len += recv_len - 2; } {% endhighlight %} -- it is clearly checked whether the buffer is big enough to hold the data copied using `memcpy()`, but no error handling happens to avoid the `memcpy()` in such cases. This code path can be triggered with malicious data coming from a smartcard.","modified":"2026-03-14T09:27:50.019907Z","published":"2018-08-15T18:29:00.747Z","related":["SUSE-SU-2019:1123-1","openSUSE-SU-2019:1341-1","openSUSE-SU-2024:11537-1"],"references":[{"type":"WEB","url":"https://usn.ubuntu.com/4276-1/"},{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2018/08/14/2"},{"type":"ADVISORY","url":"https://www.x41-dsec.de/lab/advisories/x41-2018-001-Yubico-Piv/"},{"type":"ADVISORY","url":"https://www.yubico.com/support/security-advisories/ysa-2018-03/"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"1.4.2"}]},{"events":[{"introduced":"0"},{"last_affected":"1.4.2"}]},{"events":[{"introduced":"0"},{"last_affected":"1.4.2b"}]},{"events":[{"introduced":"0"},{"last_affected":"1.4.2c"}]},{"events":[{"introduced":"0"},{"last_affected":"1.4.2d"}]},{"events":[{"introduced":"0"},{"last_affected":"1.4.2e"}]},{"events":[{"introduced":"0"},{"last_affected":"1.4.2f"}]},{"events":[{"introduced":"0"},{"last_affected":"1.4.2g"}]},{"events":[{"introduced":"0"},{"fixed":"1.6.0"}]},{"events":[{"introduced":"0"},{"last_affected":"3.7.3.160"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-14779.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}