CVE-2018-14780 Memory corruption in n/a
An out-of-bounds read in the Yubico PIV smartcard driver allows attackers to read memory or cause a crash via crafted APDU data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-14780?
CVE-2018-14780 is a medium-severity memory corruption vulnerability in n/a, published on 15 Aug 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-125
Which versions are affected by CVE-2018-14780?
It affects 3 products.
Products include Yubico Piv Manager, Yubico Piv Tool, Yubico Smart Card Minidriver.
How do I fix CVE-2018-14780?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2018-14780 being exploited?
There is no known exploitation of CVE-2018-14780 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2018-14780, GHSA-xwgg-25ph-4c8p, UBUNTU-CVE-2018-14780.