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9.8
CRITICAL CVSS 3.1
CVE-2019-19334
Libyang YANG File Parse Identityref Buffer Overflow Vulnerability
Description

In all versions of libyang before 1.0-r5, a stack-based buffer overflow was discovered in the way libyang parses YANG files with a leaf of type "identityref". An application that uses libyang to parse untrusted YANG files may be vulnerable to this flaw, which would allow an attacker to cause a denial of service or possibly gain code execution.

INFO

Published Date :

Dec. 6, 2019, 4:15 p.m.

Last Modified :

Nov. 21, 2024, 4:34 a.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2019-19334 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Redhat enterprise_linux
1 Fedoraproject fedora
1 Cesnet libyang
: Total Affected Vendor : 3 | Products : 3
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 2.0 HIGH [email protected]
CVSS 3.0 HIGH [email protected]
CVSS 3.1 CRITICAL [email protected]
Solution
This addresses a buffer overflow vulnerability in libyang by updating to a patched version.
  • Update the libyang package to a non-vulnerable version.
  • If running Red Hat Enterprise Linux 8, refer to RHSA-2019:4360 for specific guidance.
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-2019-19334.

URL Resource
https://access.redhat.com/errata/RHSA-2019:4360
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19334 Issue Tracking Patch Third Party Advisory
https://github.com/CESNET/libyang/commit/6980afae2ff9fcd6d67508b0a3f694d75fd059d6 Patch Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PETB6TVMFV5KUD4IKVP2JPLBCYHUGSAJ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RL54JMS7XW7PI6JC4BFSNNLSX5AINQUL/
https://access.redhat.com/errata/RHSA-2019:4360
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19334 Issue Tracking Patch Third Party Advisory
https://github.com/CESNET/libyang/commit/6980afae2ff9fcd6d67508b0a3f694d75fd059d6 Patch Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PETB6TVMFV5KUD4IKVP2JPLBCYHUGSAJ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RL54JMS7XW7PI6JC4BFSNNLSX5AINQUL/
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2019-19334 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-2019-19334 weaknesses.

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-2019-19334 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2019-19334 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://access.redhat.com/errata/RHSA-2019:4360
    Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19334
    Added Reference https://github.com/CESNET/libyang/commit/6980afae2ff9fcd6d67508b0a3f694d75fd059d6
    Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PETB6TVMFV5KUD4IKVP2JPLBCYHUGSAJ/
    Added Reference https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RL54JMS7XW7PI6JC4BFSNNLSX5AINQUL/
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Added Reference Red Hat, Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PETB6TVMFV5KUD4IKVP2JPLBCYHUGSAJ/ [No types assigned]
    Added Reference Red Hat, Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RL54JMS7XW7PI6JC4BFSNNLSX5AINQUL/ [No types assigned]
    Removed Reference Red Hat, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/PETB6TVMFV5KUD4IKVP2JPLBCYHUGSAJ/
    Removed Reference Red Hat, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/RL54JMS7XW7PI6JC4BFSNNLSX5AINQUL/
  • CVE Modified by [email protected]

    Dec. 23, 2019

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2019:4360 [No Types Assigned]
  • CVE Modified by [email protected]

    Dec. 18, 2019

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/RL54JMS7XW7PI6JC4BFSNNLSX5AINQUL/ [No Types Assigned]
  • Initial Analysis by [email protected]

    Dec. 18, 2019

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19334 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19334 Issue Tracking, Patch, Third Party Advisory
    Changed Reference Type https://github.com/CESNET/libyang/commit/6980afae2ff9fcd6d67508b0a3f694d75fd059d6 No Types Assigned https://github.com/CESNET/libyang/commit/6980afae2ff9fcd6d67508b0a3f694d75fd059d6 Patch, Third Party Advisory
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/PETB6TVMFV5KUD4IKVP2JPLBCYHUGSAJ/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/PETB6TVMFV5KUD4IKVP2JPLBCYHUGSAJ/ Mailing List, Third Party Advisory
    Added CWE NIST CWE-787
    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:*:*:*:*:*:* *cpe:2.3:a:cesnet:libyang:1.0:r1:*:*:*:*:*:* *cpe:2.3:a:cesnet:libyang:1.0:r2:*:*:*:*:*:* *cpe:2.3:a:cesnet:libyang:1.0:r3:*:*:*:*:*:* *cpe:2.3:a:cesnet:libyang:1.0:r4:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Dec. 18, 2019

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/PETB6TVMFV5KUD4IKVP2JPLBCYHUGSAJ/ [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 9.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Base CVSS Score: 8.1
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Base CVSS Score: 7.5
Access Vector
Access Complexity
Authentication
Confidentiality Impact
Integrity Impact
Availability Impact
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.86 }} 0.23%

score

0.74162

percentile