Skip to content
Noroxi
CVE-2018-14779· NVD / CVE Program· CNA mitre

A buffer overflow issue was discovered in the Yubico-Piv 1.5.0 smartcard driver.

A buffer overflow issue was discovered in the Yubico-Piv 1.5.0 smartcard driver. The file lib/ykpiv.c contains the following code in the function `ykpiv_transfer_data()`: {% highlight c %} if(*out_len + recv_len - 2 > max_out) { fprintf(stderr, "Output buffer to small, wanted to write %lu, max was %lu.", *out_len + recv_len - 2, max_out); } if(out_data) { memcpy(out_data, data, recv_len - 2); out_data += recv_len - 2; *out_len += recv_len - 2; } {% endhighlight %} -- it is clearly checked whether the buffer is big enough to hold the data copied using `memcpy()`, but no error handling happens to avoid the `memcpy()` in such cases. This code path can be triggered with malicious data coming from a smartcard.

MediumCVSS 6.8 · v3.0—No exploit Fix available
Published
Aug 15, 2018
Updated
Jun 16, 2026
EPSS
0.5% · 39th percentile
Follow this CVE

Sign in to follow · You’ll be notified if a followed record enters KEV, gets an exploit or is updated.

Report tools

JSON

Action score

27

Monitor

Low priority for now.

CVSS
27 / 40 · 6.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.5%

Affected systems

VendorProduct
yubicopiv manager
yubicopiv tool
yubicosmart card minidriver

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • yubico piv managerbefore 1.4.2
  • yubico piv manager1.4.2
  • yubico piv manager1.4.2b
  • yubico piv manager1.4.2c
  • yubico piv manager1.4.2d
  • yubico piv manager1.4.2e
  • yubico piv manager1.4.2f
  • yubico piv manager1.4.2g
  • yubico piv toolbefore 1.6.0
  • yubico smart card minidriverup to 3.7.3.160 inclusive

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12yubico-piv-toolbefore 1.6.1-11.6.1-1
openSUSE:Leap 15.0yubico-piv-toolbefore 1.5.0-lp150.2.3.11.5.0-lp150.2.3.1
openSUSE:Tumbleweedyubico-piv-toolbefore 2.2.0-1.52.2.0-1.5
SUSE:Linux Enterprise Module for Basesystem 15yubico-piv-toolbefore 1.5.0-3.3.331.5.0-3.3.33

Same product

yubico: all records

Other highest-scoring records for the same primary product.

  • CVE-2018-14780An out-of-bounds read issue was discovered in the Yubico-Piv 1.5.0 smartcard driver.
    18Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:yubico-piv-tool1.6.1-1 · Debian:12Package registry (OSV)
opensuse:yubico-piv-tool1.5.0-lp150.2.3.1 · openSUSE:Leap 15.0Package registry (OSV)
suse:yubico-piv-tool1.5.0-3.3.33 · SUSE:Linux Enterprise Module for Basesystem 15Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Physical access to the device is required.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Physical
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer

CVSS vector

CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records