CVE-2018-14779
A buffer overflow issue was discovered in the Yubico-Piv 1.5.0 smartcard driver.
Impact
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 is big enough to hold the data copied using `memcpy()`, but no error handling happens to avoid the `memcpy()` in such cases. This code path can be triggered with malicious data coming from a smartcard.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Yubico | Piv Manager | before 1.4.2 Versions 1.4.2, 1.4.2b, 1.4.2c, 1.4.2d, 1.4.2e |
| Yubico | Piv Tool | before 1.6.0 |
| Yubico | Smart Card Minidriver | through 3.7.3.160 |
Weakness classification
References
- NVD record
- CVE.org record
- http://www.openwall.com/lists/oss-security/2018/08/14/2
- https://usn.ubuntu.com/4276-1/
- https://www.x41-dsec.de/lab/advisories/x41-2018-001-Yubico-Piv/
- https://www.yubico.com/support/security-advisories/ysa-2018-03/
- http://www.openwall.com/lists/oss-security/2018/08/14/2
- https://usn.ubuntu.com/4276-1/
- https://www.x41-dsec.de/lab/advisories/x41-2018-001-Yubico-Piv/
- https://www.yubico.com/support/security-advisories/ysa-2018-03/