CVSS: 4.6EPSS: 0%CPEs: 3EXPL: 1CVE-2020-13132
https://notcve.org/view.php?id=CVE-2020-13132
09 Jul 2020 — An issue was discovered in Yubico libykpiv before 2.1.0. An attacker can trigger an incorrect free() in the ykpiv_util_generate_key() function in lib/util.c through incorrect error handling code. This could be used to cause a denial of service attack. Se detectó un problema en Yubico libykpiv versiones anteriores a 2.1.0. Un atacante puede desencadenar un free() incorrecto en la función ykpiv_util_generate_key() en la biblioteca lib/util.c por medio de un código de manejo de errores incorrecto. • https://blog.inhq.net/posts/yubico-libykpiv-vuln • CWE-763: Release of Invalid Pointer or Reference •
CVSS: 4.3EPSS: 0%CPEs: 3EXPL: 1CVE-2020-13131
https://notcve.org/view.php?id=CVE-2020-13131
09 Jul 2020 — An issue was discovered in Yubico libykpiv before 2.1.0. lib/util.c in this library (which is included in yubico-piv-tool) does not properly check embedded length fields during device communication. A malicious PIV token can misreport the returned length fields during RSA key generation. This will cause stack memory to be copied into heap allocated memory that gets returned to the caller. The leaked memory could include PINs, passwords, key material, and other sensitive information depending on the integrat... • https://blog.inhq.net/posts/yubico-libykpiv-vuln • CWE-125: Out-of-bounds Read •
CVSS: 7.2EPSS: 0%CPEs: 10EXPL: 0CVE-2018-14779 – Ubuntu Security Notice USN-4276-1
https://notcve.org/view.php?id=CVE-2018-14779
14 Aug 2018 — A buffer overflow 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_transfer_data()`: {% highlight c %} if(*out_len + recv_len - 2 > max_out) { fprintf(stderr, "Output buffer to small, wanted to write %lu, max was %lu.", *out_len + recv_len - 2, max_out); } if(out_data) { memcpy(out_data, data, recv_len - 2); out_data += recv_len - 2; *out_len += recv_len - 2; } {% endhighlight %} -- it is clearly checked whether the buffer... • http://www.openwall.com/lists/oss-security/2018/08/14/2 • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer CWE-787: Out-of-bounds Write •
CVSS: 4.6EPSS: 0%CPEs: 10EXPL: 0CVE-2018-14780 – Yubico PIV Tool 1.5.0 Buffer Overflow
https://notcve.org/view.php?id=CVE-2018-14780
14 Aug 2018 — 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... • http://www.openwall.com/lists/oss-security/2018/08/14/2 • CWE-125: Out-of-bounds Read •