Vulnerability Monitor

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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.

Published

2018-08-15T18:29:00.887

Last Modified

2024-11-21T03:49:46.553

Status

Modified

Source

[email protected]

Severity

CVSSv3.0: 4.6 (MEDIUM)

CVSSv2 Vector

AV:L/AC:L/Au:N/C:P/I:N/A:N

  • Access Vector: LOCAL
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: PARTIAL
  • Integrity Impact: NONE
  • Availability Impact: NONE
Exploitability Score

3.9

Impact Score

2.9

Weaknesses
  • Type: Primary
    CWE-125
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application yubico piv_manager < 1.4.2 Yes
Application yubico piv_manager 1.4.2 Yes
Application yubico piv_manager 1.4.2b Yes
Application yubico piv_manager 1.4.2c Yes
Application yubico piv_manager 1.4.2d Yes
Application yubico piv_manager 1.4.2e Yes
Application yubico piv_manager 1.4.2f Yes
Application yubico piv_manager 1.4.2g Yes
Application yubico piv_tool < 1.6.0 Yes
Application yubico smart_card_minidriver ≤ 3.7.3.160 Yes
References