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01 Record

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

MediumPUBLISHEDCNA: mitre
CNA base score4.3 CVSS v3.xCVSS:3.0/AC:L/AV:P/A:N/C:H/I:N/PR:N/S:U/UI:R

02 Description

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

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
0.49% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 41.9% of scored records. A rank, not a probability.
NVD base score
4.3 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2020-07-09 17:50Z6 YR AGO
Last updated
2024-08-04 12:11Z2 YR AGO
Reserved
2020-05-18
Assigning CNA
mitre
Record state
PUBLISHED
Severity
Medium (CVSS 4.3)
CNA CVSS vector
CVSS:3.0/AC:L/AV:P/A:N/C:H/I:N/PR:N/S:U/UI:R
Weaknesses
Data version
5.1
Document digest
8c998222225b7496d2a9051bcad59f882c66a31f5523ae30bb32637293108b6a

05 Affected products

VendorProductVersionsPlatforms
yubicolibykpivNot specified—
yubicopiv_tool_managerNot specified—
yubicoyubikey_smart_card_minidriverNot specified—

06 References

07 Fixed in

Debian 12

  • yubico-piv-tool
    Fixed in 2.1.1-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • yubico-piv-tool
    Fixed in 2.1.1-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • yubico-piv-tool
    Fixed in 2.1.1-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 18.04 LTS

  • yubico-piv-tool
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 20.04 LTS

  • yubico-piv-tool
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 16.04 LTS

  • yubico-piv-tool
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.