Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2018-14780

Severity CVSS v4.0:
Pending analysis
Type:
CWE-125 Out-of-bounds Read
Publication date:
15/08/2018
Last modified:
25/02/2020

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.

Impact

Vector 3.x
CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS v3.1 Severity and Metrics:

Base Score: 4.60 MEDIUM
Vector: CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector (AV): Physical
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): None
Availability (A): None

Base Score 3.x
4.60
Severity 3.x
MEDIUM
Vector 2.0
AV:L/AC:L/Au:N/C:P/I:N/A:N CVSS v2.0 Severity and Metrics:

Base Score: 2.10 LOW
Vector: AV:L/AC:L/Au:N/C:P/I:N/A:N

Attack Vector (AV): Local
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): None
Availability (A): None

Base Score 2.0
2.10
Severity 2.0
LOW

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:yubico:piv_manager:*:*:*:*:*:*:*:* 1.4.2 (excluding)
cpe:2.3:a:yubico:piv_manager:1.4.2:*:*:*:*:*:*:*
cpe:2.3:a:yubico:piv_manager:1.4.2b:*:*:*:*:*:*:*
cpe:2.3:a:yubico:piv_manager:1.4.2c:*:*:*:*:*:*:*
cpe:2.3:a:yubico:piv_manager:1.4.2d:*:*:*:*:*:*:*
cpe:2.3:a:yubico:piv_manager:1.4.2e:*:*:*:*:*:*:*
cpe:2.3:a:yubico:piv_manager:1.4.2f:*:*:*:*:*:*:*
cpe:2.3:a:yubico:piv_manager:1.4.2g:*:*:*:*:*:*:*
cpe:2.3:a:yubico:piv_tool:*:*:*:*:*:*:*:* 1.6.0 (excluding)
cpe:2.3:a:yubico:smart_card_minidriver:*:*:*:*:*:*:*:* 3.7.3.160 (including)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools