CVE-2018-14779

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.

Link	Resource
https://www.yubico.com/support/security-advisories/ysa-2018-03/	Vendor Advisory
https://www.x41-dsec.de/lab/advisories/x41-2018-001-Yubico-Piv/	Third Party Advisory
http://www.openwall.com/lists/oss-security/2018/08/14/2	Mailing List Third Party Advisory
https://usn.ubuntu.com/4276-1/

Configuration 1

cpe:2.3:a:yubico:smart_card_minidriver:*:*:*:*:*:*:*:* cpe:2.3:a:yubico:piv_manager:1.4.2g:*:*:*:*:*:*:* cpe:2.3:a:yubico:piv_manager:1.4.2f:*:*:*:*:*:*:* cpe:2.3:a:yubico:piv_manager:1.4.2e:*:*:*:*:*:*:* cpe:2.3:a:yubico:piv_manager:1.4.2d:*:*:*:*:*:*:* cpe:2.3:a:yubico:piv_manager:1.4.2c:*:*:*:*:*:*:* cpe:2.3:a:yubico:piv_manager:1.4.2b:*:*:*:*:*:*:* cpe:2.3:a:yubico:piv_tool:*:*:*:*:*:*:*:* cpe:2.3:a:yubico:piv_manager:*:*:*:*:*:*:*:* cpe:2.3:a:yubico:piv_manager:1.4.2:*:*:*:*:*:*:*

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Published : 2018-08-15 06:29

Updated : 2020-02-25 04:15

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NVD link : CVE-2018-14779

Mitre link : CVE-2018-14779

No products.

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

CWE-787