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Ubuntu: USN-4276-1 (CVE-2018-14780): Yubico PIV Tool vulnerabilities

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Ubuntu: USN-4276-1 (CVE-2018-14780): Yubico PIV Tool vulnerabilities

Severity
2
CVSS
(AV:L/AC:L/Au:N/C:P/I:N/A:N)
Published
08/15/2018
Created
02/14/2020
Added
02/12/2020
Modified
03/25/2022

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.

Solution(s)

  • ubuntu-upgrade-libykpiv1
  • ubuntu-upgrade-ykcs11
  • ubuntu-upgrade-yubico-piv-tool

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