CVE-2018-14780

An out-of-bounds read 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_fetch_object(): {% highlight c %} if(sw == SW_SUCCESS) {
size_t outlen; int offs = _ykpiv_get_length(data + 1, &outlen); if(offs ==
0) { return YKPIV_SIZE_ERROR; } memmove(data, data + 1 + offs, outlen);
*len = outlen; return YKPIV_OK; } else { return YKPIV_GENERIC_ERROR; } {%
endhighlight %} – in the end, a memmove() occurs with a length retrieved
from APDU data. This length is not checked for whether it is outside of the
APDU data retrieved. Therefore the memmove() could copy bytes behind the
allocated data buffer into this buffer.

Bugs

• <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=906128&gt;