A double free when handling responses from an HSM Card in sc_pkcs15emu_sc_hsm_init in libopensc/pkcs15-sc-hsm.c in OpenSC before 0.19.0-rc1 could be used by attackers able to supply crafted smartcards to cause a denial of service (application crash) or possibly have unspecified other impact.
Weakness
The product calls free() twice on the same memory address.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Opensc | Opensc_project | * | 0.18.0 (including) |
| Opensc | Ubuntu | bionic | * |
| Opensc | Ubuntu | cosmic | * |
| Opensc | Ubuntu | esm-apps/bionic | * |
| Opensc | Ubuntu | esm-apps/xenial | * |
| Opensc | Ubuntu | trusty | * |
| Opensc | Ubuntu | upstream | * |
| Opensc | Ubuntu | xenial | * |
Potential Mitigations
References
- https://github.com/OpenSC/OpenSC/commit/360e95d45ac4123255a4c796db96337f332160ad#diff-d643a0fa169471dbf2912f4866dc49c5
- https://github.com/OpenSC/OpenSC/releases/tag/0.19.0-rc1
- https://lists.debian.org/debian-lts-announce/2019/09/msg00009.html
- https://www.x41-dsec.de/lab/advisories/x41-2018-002-OpenSC/
- https://github.com/OpenSC/OpenSC/commit/360e95d45ac4123255a4c796db96337f332160ad#diff-d643a0fa169471dbf2912f4866dc49c5
- https://github.com/OpenSC/OpenSC/releases/tag/0.19.0-rc1
- https://lists.debian.org/debian-lts-announce/2019/09/msg00009.html
- https://www.x41-dsec.de/lab/advisories/x41-2018-002-OpenSC/