Out-of-bounds Read Affecting yubico/yubico-piv-tool package, versions [,1.6.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-YUBICOYUBICOPIVTOOL-2366313
- published26 Jan 2022
- disclosed15 Aug 2018
- creditUnknown
Introduced: 15 Aug 2018
CVE-2018-14780 (opens in a new tab)How to fix?
Upgrade yubico/yubico-piv-tool to version 1.6.0 or higher.
Overview
Affected versions of this package are vulnerable to Out-of-bounds Read. 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.