CVE-2018-14780
An out-of-bounds read issue was discovered in the Yubico-Piv 1.5.0 smartcard driver.
Published 8 y ago · modified 4 mo ago · JSON
Summary
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.
Exploit prediction (EPSS)
0.45% probability of exploitation in the next 30 days, higher than 39% of all scored CVEs.
CVSS scores
| Assigned by | Version | Score | Vector |
|---|---|---|---|
| NVD | 3.0 | 4.6 | CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 2.1 | AV:L/AC:L/Au:N/C:P/I:N/A:N |
Classification
- Weakness
- CWE-125 Out-of-bounds Read
References
- yubico.com /support/security-advisories/ysa-2018-03/ · x_refsource_CONFIRM, x_transferred
- x41-dsec.de /lab/advisories/x41-2018-001-Yubico-Piv/ · x_refsource_MISC, x_transferred
- openwall.com /lists/oss-security/2018/08/14/2 · mailing-list, x_refsource_MLIST, x_transferred
- usn.ubuntu.com /4276-1/ · vendor-advisory, x_refsource_UBUNTU, x_transferred
Sources
- CVE List: CVE-2018-14780
- NVD: CVE-2018-14780
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