CVE Vulnerability

CVE-2020-13131

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 integration. During further processing by the caller, this information could leak across trust boundaries. Note that RSA key generation is triggered by the host and cannot directly be triggered by the token.

1.9 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 3.4 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

Scope

4.3 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 0.7 / Impact : 3.6

Attack Vector PHYSICAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://www.yubico.com/products/services-software/download/smart-card-drivers-tools/ Vendor Advisory
https://blog.inhq.net/posts/yubico-libykpiv-vuln/ Exploit Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:yubico:libykpiv:*:*:*:*:*:*:*:*
cpe:2.3:a:yubico:piv_tool_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:yubico:yubikey_smart_card_minidriver:*:*:*:*:*:*:*:*
Information

Published : 2020-07-09 06:15

Updated : 2020-07-16 07:04

NVD link : CVE-2020-13131

Mitre link : CVE-2020-13131

Products Affected
No products.
CWE
CWE-125

Out-of-bounds Read