CVE-2019-20393

Public Exploit

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.

Category

8.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.24%
Third-Party Advisory redhat.com Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/CESNET/libyang/compare/v0.16-r3...v1.0-r1 third party advisory
https://github.com/CESNET/libyang/issues/742 third party advisory exploit
https://github.com/CESNET/libyang/commit/d9feacc4a590d35dbc1af21caf9080008b4450ed third party advisory patch
https://bugzilla.redhat.com/show_bug.cgi?id=1793930 issue tracking third party advisory patch
https://lists.debian.org/debian-lts-announce/2023/09/msg00019.html mailing list

Frequently Asked Questions

What is the severity of CVE-2019-20393?
CVE-2019-20393 has been scored as a high severity vulnerability.
How to fix CVE-2019-20393?
To fix CVE-2019-20393, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-20393 being actively exploited in the wild?
It is possible that CVE-2019-20393 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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