CVE-2018-16421

Public Exploit

Description

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.

Category

6.6
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.21%
Vendor Advisory redhat.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/OpenSC/OpenSC/commit/360e95d45ac4123255a4c796db96337f332160ad#diff-848b13147a344ba2c6361d91ca77feb1 third party advisory patch
https://github.com/OpenSC/OpenSC/releases/tag/0.19.0-rc1 patch third party advisory release notes
https://www.x41-dsec.de/lab/advisories/x41-2018-002-OpenSC/ third party advisory exploit
https://access.redhat.com/errata/RHSA-2019:2154 vendor advisory
https://lists.debian.org/debian-lts-announce/2019/09/msg00009.html mailing list

Frequently Asked Questions

What is the severity of CVE-2018-16421?
CVE-2018-16421 has been scored as a medium severity vulnerability.
How to fix CVE-2018-16421?
To fix CVE-2018-16421, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-16421 being actively exploited in the wild?
It is possible that CVE-2018-16421 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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