CVE-2018-16421: opensc_project opensc
Vulnerability summary
CVE-2018-16421 is a medium (CVSS 6.6) vulnerability in opensc_project opensc. EPSS estimates a 0.72% chance of exploitation in the next 30 days, higher than 53% of scored vulnerabilities. 1 public exploit is recorded.
Advisory lineage
Upstream 0 · Downstream 5 · Related 2Timeline
- 04-09-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated6.6MediumCVSS:3.0/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated6.6MediumCVSS:3.0/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.72%
Chance of exploitation in the next 30 days
Percentile
53%
Versus all other CVEs
30-day change
+0.03 pp
From 0.69% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (x41-dsec.de)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Debian1 product
- opensc< 0.19.0~rc1-1
Opensc_project1 product
- opensc≤ 0.18.0
Ubuntu1 product
- openscAll versions (No fix recorded)
3 vendors · 3 products
References
8 links- github.com/OpenSC/OpenSC/commit/360e95d45ac4123255a4c796db96337f332160adX Refsource MISCPatchThird Party Advisory
- github.com/OpenSC/OpenSC/releases/tag/0.19.0-rc1X Refsource MISCPatchRelease NotesThird Party AdvisoryREPORT
- www.x41-dsec.de/lab/advisories/x41-2018-002-OpenSC/X Refsource MISCExploitThird Party AdvisoryREPORT
