CVE-2018-20340
Yubico YubiKey Unchecked Buffer Overflow Vulnerability
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.
INFO
Published Date :
March 21, 2019, 4 p.m.
Last Modified :
Nov. 21, 2024, 4:01 a.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
0.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2018-20340.
| URL | Resource |
|---|---|
| https://blog.inhq.net/posts/yubico-libu2f-host-vuln-part1/ | |
| https://developers.yubico.com/libu2f-host/Release_Notes.html | Release Notes Vendor Advisory |
| https://seclists.org/bugtraq/2019/Feb/23 | Mailing List Third Party Advisory |
| https://security.gentoo.org/glsa/202004-15 | |
| https://www.debian.org/security/2019/dsa-4389 | Third Party Advisory |
| https://www.yubico.com/support/security-advisories/ysa-2019-01/ | Patch Vendor Advisory |
| https://blog.inhq.net/posts/yubico-libu2f-host-vuln-part1/ | |
| https://developers.yubico.com/libu2f-host/Release_Notes.html | Release Notes Vendor Advisory |
| https://seclists.org/bugtraq/2019/Feb/23 | Mailing List Third Party Advisory |
| https://security.gentoo.org/glsa/202004-15 | |
| https://www.debian.org/security/2019/dsa-4389 | Third Party Advisory |
| https://www.yubico.com/support/security-advisories/ysa-2019-01/ | Patch Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2018-20340 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2018-20340 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://blog.inhq.net/posts/yubico-libu2f-host-vuln-part1/ Added Reference https://developers.yubico.com/libu2f-host/Release_Notes.html Added Reference https://seclists.org/bugtraq/2019/Feb/23 Added Reference https://security.gentoo.org/glsa/202004-15 Added Reference https://www.debian.org/security/2019/dsa-4389 Added Reference https://www.yubico.com/support/security-advisories/ysa-2019-01/ -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
May. 01, 2020
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/202004-15 [No Types Assigned] -
CVE Modified by [email protected]
Dec. 05, 2019
Action Type Old Value New Value Added Reference https://blog.inhq.net/posts/yubico-libu2f-host-vuln-part1/ [No Types Assigned] -
Initial Analysis by [email protected]
Mar. 27, 2019
Action Type Old Value New Value Added CVSS V2 (AV:L/AC:L/Au:N/C:P/I:P/A:P) Added CVSS V3 AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://www.debian.org/security/2019/dsa-4389 No Types Assigned https://www.debian.org/security/2019/dsa-4389 Third Party Advisory Changed Reference Type https://seclists.org/bugtraq/2019/Feb/23 No Types Assigned https://seclists.org/bugtraq/2019/Feb/23 Mailing List, Third Party Advisory Changed Reference Type https://developers.yubico.com/libu2f-host/Release_Notes.html No Types Assigned https://developers.yubico.com/libu2f-host/Release_Notes.html Release Notes, Vendor Advisory Changed Reference Type https://www.yubico.com/support/security-advisories/ysa-2019-01/ No Types Assigned https://www.yubico.com/support/security-advisories/ysa-2019-01/ Patch, Vendor Advisory Added CWE CWE-119 Added CPE Configuration OR *cpe:2.3:a:yubico:libu2f-host:1.1.6:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2018-20340 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2018-20340
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.19 }} 0.04%
score
0.55787
percentile