CVE-2018-14779
A buffer overflow issue was discovered in the Yubico-Piv 1.5.0 smartcard driver.
Does this matter?
Lower severity and a low EPSS score (0.49%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.0
- 6.8 MEDIUMCVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.49% probability · 42th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-119, CWE-787
- Affected
- yubico/piv manager · yubico/piv tool · yubico/smart card minidriver
- Source
- cve@mitre.org
EPSS 0.5% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.openwall.com/lists/oss-security/2018/08/14/2Mailing List, Third Party Advisory
- https://usn.ubuntu.com/4276-1/
- https://www.x41-dsec.de/lab/advisories/x41-2018-001-Yubico-Piv/Third Party Advisory
- https://www.yubico.com/support/security-advisories/ysa-2018-03/Vendor Advisory
- http://www.openwall.com/lists/oss-security/2018/08/14/2Mailing List, Third Party Advisory
- https://usn.ubuntu.com/4276-1/
- https://www.x41-dsec.de/lab/advisories/x41-2018-001-Yubico-Piv/Third Party Advisory
- https://www.yubico.com/support/security-advisories/ysa-2018-03/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.