CVE-2018-14780

Publication date 15 August 2018

Last updated 24 July 2024

Ubuntu priority

High

Why this priority?

Cvss 3 Severity Score

4.6 · Medium

Score breakdown

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.

From the Ubuntu Security Team

It was discovered that libykpiv, a supporting library of the Yubico PIV tool and YubiKey PIV Manager, mishandled specially crafted input. An attacker with a custom-made, malicious USB device could potentially execute arbitrary code on a computer running the Yubico PIV Tool or Yubikey PIV Manager.

Status

Package Ubuntu Release Status
yubico-piv-tool 22.04 LTS jammy
Not affected
21.10 impish
Not affected
21.04 hirsute
Not affected
20.10 groovy
Not affected
20.04 LTS focal
Not affected
19.10 eoan
Not affected
19.04 disco Ignored end of life
18.10 cosmic Ignored end of life
18.04 LTS bionic
Fixed 1.4.2-2ubuntu0.1
16.04 LTS xenial
14.04 LTS trusty Not in release

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Severity score breakdown

Parameter Value
Base score 4.6 · Medium
Attack vector Physical
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

Related Ubuntu Security Notices (USN)

    • USN-4276-1
    • Yubico PIV Tool vulnerabilities
    • 11 February 2020
    • USN-4846-1
    • Yubico PIV Tool vulnerabilities
    • 15 March 2021

Other references