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CVE-2018-20340

N/A
Published: March 17, 2019 at 08:06 PM UTC
Updated: June 17, 2026 at 01:52 AM UTC
2 products affected across 2 vendorsDebian LinuxLIBU2F Host

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Severity
N/A
Exploit prediction
EPSS 0.5%

Description

Yubico libu2f-host 1.1.6 contains unchecked buffers in devs.c, which could enable a malicious token to exploit a buffer overflow. An attacker could use this to attempt to execute malicious code using a crafted USB device masquerading as a security token on a computer where the affected library is currently in use. It is not possible to perform this attack with a genuine YubiKey.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (6)

x_refsource_MISC
Source: [email protected]
https://blog.inhq.net/posts/yubico-libu2f-host-vuln-part1/
x_refsource_CONFIRMRelease NotesVendor Advisory
Source: [email protected]
https://developers.yubico.com/libu2f-host/Release_Notes.html
x_refsource_MISCMailing ListThird Party Advisory
Source: [email protected]
https://seclists.org/bugtraq/2019/Feb/23
Vendor Advisoryx_refsource_GENTOO
Source: [email protected]
https://security.gentoo.org/glsa/202004-15
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://www.debian.org/security/2019/dsa-4389
x_refsource_CONFIRMPatchVendor Advisory
Source: [email protected]
https://www.yubico.com/support/security-advisories/ysa-2019-01/

CVSS

4.6MEDIUM[email protected]
Confidentiality
PARTIAL
Integrity
PARTIAL
Availability
PARTIAL
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-119

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