Out-of-bounds Read Affecting yubico-piv-tool package, versions <2.1.1-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.14% (50th percentile)

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  • Snyk IDSNYK-DEBIAN11-YUBICOPIVTOOL-584414
  • published15 Jul 2020
  • disclosed9 Jul 2020

Introduced: 9 Jul 2020

CVE-2020-13131  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade Debian:11 yubico-piv-tool to version 2.1.1-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream yubico-piv-tool package and not the yubico-piv-tool package as distributed by Debian. See How to fix? for Debian:11 relevant fixed versions and status.

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.

CVSS Scores

version 3.1