CVE-2018-14780

Severity: medium (CVSS 4.6 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-08-15 · updated 2026-06-17
Weakness: CWE-125

Description

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.

Affected products

Yubico Piv Manager: before 1.4.2; 1.4.2, 1.4.2b, 1.4.2c, 1.4.2d, 1.4.2e, 1.4.2f (+1) — fixed in 1.4.2
Yubico Piv Tool: before 1.6.0 — fixed in 1.6.0
Yubico Smart Card Minidriver: through 3.7.3.160

How to fix

Upgrade to a fixed version: Yubico Piv Manager 1.4.2; Yubico Piv Tool 1.6.0. Check the vendor advisory for mitigations.

References

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