CVE-2018-20340
Published: 8 February 2019
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.
Notes
Author | Note |
---|---|
sbeattie | requires libpam-u2f setup or other yubikey based software applications. Browser U2F implmentations are NOT affected. |
Priority
Status
Package | Release | Status |
---|---|---|
libu2f-host Launchpad, Ubuntu, Debian |
jammy |
Not vulnerable
(1.1.7-1)
|
kinetic |
Not vulnerable
(1.1.7-1)
|
|
bionic |
Released
(1.1.4-1ubuntu0.1)
|
|
cosmic |
Released
(1.1.6-1ubuntu0.1)
|
|
disco |
Not vulnerable
(1.1.7-1)
|
|
eoan |
Not vulnerable
(1.1.7-1)
|
|
focal |
Not vulnerable
(1.1.7-1)
|
|
groovy |
Not vulnerable
(1.1.7-1)
|
|
hirsute |
Not vulnerable
(1.1.7-1)
|
|
impish |
Not vulnerable
(1.1.7-1)
|
|
lunar |
Not vulnerable
(1.1.7-1)
|
|
trusty |
Does not exist
|
|
upstream |
Pending
(1.1.7)
|
|
xenial |
Needed
|
|
mantic |
Not vulnerable
(1.1.7-1)
|
|
Patches: upstream: https://github.com/Yubico/libu2f-host/commit/4d490bb2c528c351e32837fcdaebd998eb5d3f27 |
||
Binaries built from this source package are in Universe and so are supported by the community. |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 6.8 |
Attack vector | Physical |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | High |
Availability impact | High |
Vector | CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |