Upstream information
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.
| 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 |
| 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 |
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Please note that this evaluation state might be work in progress, incomplete or outdated.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 |
