CVE-2019-20393
Libyang Double-Free Flaw
Description
A double-free is present in libyang before v1.0-r1 in the function yyparse() when an empty description is used. Applications that use libyang to parse untrusted input yang files may be vulnerable to this flaw, which would cause a crash or potentially code execution.
INFO
Published Date :
Jan. 22, 2020, 10:15 p.m.
Last Modified :
Sept. 19, 2023, 10:15 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
2.8
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-2019-20393.
| URL | Resource |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1793930 | Issue Tracking Patch Third Party Advisory |
| https://github.com/CESNET/libyang/commit/d9feacc4a590d35dbc1af21caf9080008b4450ed | Patch Third Party Advisory |
| https://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1 | Third Party Advisory |
| https://github.com/CESNET/libyang/issues/742 | Exploit Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html |
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-2019-20393 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2019-20393 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 [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Sep. 19, 2023
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html [No Types Assigned] -
Initial Analysis by [email protected]
Jan. 23, 2020
Action Type Old Value New Value Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:P/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=1793930 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=1793930 Issue Tracking, Patch, Third Party Advisory Changed Reference Type https://github.com/CESNET/libyang/commit/d9feacc4a590d35dbc1af21caf9080008b4450ed No Types Assigned https://github.com/CESNET/libyang/commit/d9feacc4a590d35dbc1af21caf9080008b4450ed Patch, Third Party Advisory Changed Reference Type https://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1 No Types Assigned https://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1 Third Party Advisory Changed Reference Type https://github.com/CESNET/libyang/issues/742 No Types Assigned https://github.com/CESNET/libyang/issues/742 Exploit, Third Party Advisory Added CWE NIST CWE-415 Added CPE Configuration OR *cpe:2.3:a:cesnet:libyang:0.11:r1:*:*:*:*:*:* *cpe:2.3:a:cesnet:libyang:0.11:r2:*:*:*:*:*:* *cpe:2.3:a:cesnet:libyang:0.12:r1:*:*:*:*:*:* *cpe:2.3:a:cesnet:libyang:0.12:r2:*:*:*:*:*:* *cpe:2.3:a:cesnet:libyang:0.13:r1:*:*:*:*:*:* *cpe:2.3:a:cesnet:libyang:0.13:r2:*:*:*:*:*:* *cpe:2.3:a:cesnet:libyang:0.14:r1:*:*:*:*:*:* *cpe:2.3:a:cesnet:libyang:0.15:r1:*:*:*:*:*:* *cpe:2.3:a:cesnet:libyang:0.16:r1:*:*:*:*:*:* *cpe:2.3:a:cesnet:libyang:0.16:r2:*:*:*:*:*:* *cpe:2.3:a:cesnet:libyang:0.16:r3:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2019-20393 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-2019-20393
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.79 }} 0.14%
score
0.81952
percentile