CVE-2018-16421: Buffer Overflow
First published: Tue Sep 04 2018(Updated: )
Several buffer overflows when handling responses from a CAC Card in cac_get_serial_nr_from_CUID in libopensc/card-cac.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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Opensc Project Opensc | <=0.18.0 |
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Reference Links
- https://access.redhat.com/errata/RHSA-2019:2154
- https://github.com/OpenSC/OpenSC/commit/360e95d45ac4123255a4c796db96337f332160ad#diff-848b13147a344ba2c6361d91ca77feb1
- 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://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1628035
- https://access.redhat.com/security/cve/cve-2018-16421
- https://bugzilla.redhat.com/show_bug.cgi?id=1628034
Frequently Asked Questions
What is CVE-2018-16421?
CVE-2018-16421 is a vulnerability that allows attackers to cause a denial of service (application crash) or possibly have other unspecified impact by exploiting buffer overflows when handling responses from a CAC Card in OpenSC before version 0.19.0-rc1.
How severe is CVE-2018-16421?
CVE-2018-16421 has a severity score of 6.6 (medium).
Which software versions are affected by CVE-2018-16421?
OpenSC versions up to and including 0.18.0 and Red Hat OpenSC versions up to but excluding 0.19.0 are affected by CVE-2018-16421.
How can I fix CVE-2018-16421?
To fix CVE-2018-16421, update OpenSC to version 0.19.0 or later, or update Red Hat OpenSC to version 0.19.0 or later.
What is CWE-119?
CWE-119 is a common weakness enumeration category for buffer errors, such as buffer overflows, which is associated with CVE-2018-16421.
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