CVE-2018-16425 — A double free when handling responses from an HSM Card in sc_pkcs15emu_sc_hsm_in

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 o

01What is this vulnerability?

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.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2018-09-04T00:00:00.000Z
• Last modified: 2024-08-05T10:24:32.094Z

09References

• github.com — https://github.com/OpenSC/OpenSC/releases/tag/0.19.0-rc1
• github.com — https://github.com/OpenSC/OpenSC/commit/360e95d45ac4123255a4c796db96337f332160ad…
• www.x41-dsec.de — https://www.x41-dsec.de/lab/advisories/x41-2018-002-OpenSC/
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2019/09/msg00009.html