CVE-2019-20398

CVSS V2 Medium 4.3 CVSS V3 Medium 6.5
Description
A NULL pointer dereference is present in libyang before v1.0-r3 in the function lys_extension_instances_free() due to a copy of unresolved extensions in lys_restr_dup(). Applications that use libyang to parse untrusted input yang files may crash.
Overview
  • CVE ID
  • CVE-2019-20398
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2020-01-22T22:15:10
  • Last Modified Date
  • 2020-01-23T20:13:02
Weakness Enumerations
CWE URL
CWE-476 http://cwe.mitre.org/data/definitions/476.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:cesnet:libyang:0.11:r1:*:*:*:*:*:* 1 OR
cpe:2.3:a:cesnet:libyang:0.11:r2:*:*:*:*:*:* 1 OR
cpe:2.3:a:cesnet:libyang:0.12:r1:*:*:*:*:*:* 1 OR
cpe:2.3:a:cesnet:libyang:0.12:r2:*:*:*:*:*:* 1 OR
cpe:2.3:a:cesnet:libyang:0.13:r1:*:*:*:*:*:* 1 OR
cpe:2.3:a:cesnet:libyang:0.13:r2:*:*:*:*:*:* 1 OR
cpe:2.3:a:cesnet:libyang:0.14:r1:*:*:*:*:*:* 1 OR
cpe:2.3:a:cesnet:libyang:0.15:r1:*:*:*:*:*:* 1 OR
cpe:2.3:a:cesnet:libyang:0.16:r1:*:*:*:*:*:* 1 OR
cpe:2.3:a:cesnet:libyang:0.16:r2:*:*:*:*:*:* 1 OR
cpe:2.3:a:cesnet:libyang:0.16:r3:*:*:*:*:*:* 1 OR
cpe:2.3:a:cesnet:libyang:1.0:r1:*:*:*:*:*:* 1 OR
cpe:2.3:a:cesnet:libyang:1.0:r2:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:M/Au:N/C:N/I:N/A:P
  • Access Vector
  • NETWORK
  • Access Compatibility
  • MEDIUM
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • NONE
  • Availability Impact
  • PARTIAL
  • Base Score
  • 4.3
  • Severity
  • MEDIUM
  • Exploitability Score
  • 8.6
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • REQUIRED
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • HIGH
  • Base Score
  • 6.5
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 2.8
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://github.com/CESNET/libyang/commit/7852b272ef77f8098c35deea6c6f09cb78176f08 Patch
https://bugzilla.redhat.com/show_bug.cgi?id=1793935 Issue Tracking Patch Third Party Advisory
https://github.com/CESNET/libyang/compare/v1.0-r2...v1.0-r3 Third Party Advisory
https://github.com/CESNET/libyang/issues/773 Exploit Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2019-20398
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-20398
History
Created Old Value New Value Data Type Notes
2022-05-10 16:52:39 Added to TrackCVE
2022-12-04 09:57:40 2020-01-22T22:15Z 2020-01-22T22:15:10 CVE Published Date updated
2022-12-04 09:57:40 2020-01-23T20:13:02 CVE Modified Date updated
2022-12-04 09:57:40 Analyzed Vulnerability Status updated