Upstream information

CVE-2020-13131 at MITRE

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 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.

SUSE information

Overall state of this security issue: Pending

This issue is currently rated as having moderate severity.

CVSS v2 Scores
  National Vulnerability Database
Base Score 1.9
Vector AV:L/AC:M/Au:N/C:P/I:N/A:N
Access Vector Local
Access Complexity Medium
Authentication None
Confidentiality Impact Partial
Integrity Impact None
Availability Impact None
CVSS v3 Scores
  National Vulnerability Database SUSE
Base Score 4.3 4.3
Vector CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Access Vector Physical Physical
Access Complexity Low Low
Privileges Required None Low
User Interaction Required None
Scope Unchanged Unchanged
Confidentiality Impact High High
Integrity Impact None None
Availability Impact None None
CVSSv3 Version 3.1 3.1
SUSE Bugzilla entry: 1178119 [NEW]

No SUSE Security Announcements cross referenced.


Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.

Product(s) Source package State
SUSE Linux Enterprise 15-SP1 Module for Basesystem yubico-piv-tool Affected
SUSE Linux Enterprise 15-SP2 Module for Basesystem yubico-piv-tool Affected
SUSE Linux Enterprise High Performance Computing 12 SP5 yubico-piv-tool Affected
SUSE Linux Enterprise High Performance Computing 15 LTSS yubico-piv-tool Affected
SUSE Linux Enterprise Server 12 SP4 ESPOS yubico-piv-tool Affected
SUSE Linux Enterprise Server 12 SP4 LTSS yubico-piv-tool Affected
SUSE Linux Enterprise Server 12 SP5 yubico-piv-tool Affected
SUSE Linux Enterprise Server 15 LTSS yubico-piv-tool Affected
SUSE Linux Enterprise Server ESPOS 15 yubico-piv-tool Affected
SUSE Linux Enterprise Server for SAP Applications 12 SP4 yubico-piv-tool Affected
SUSE Linux Enterprise Server for SAP Applications 12 SP5 yubico-piv-tool Affected
SUSE Linux Enterprise Server for SAP Applications 15 yubico-piv-tool Affected
SUSE OpenStack Cloud 9 yubico-piv-tool Affected
SUSE OpenStack Cloud Crowbar 9 yubico-piv-tool Affected